Author: "Dept. Accelerateurs" - Searchworks@Jio Institute Digital Library Search Results

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103 results on '"Dept. Accelerateurs"'

1. Radiation therapy at compact Compton sources

Author: Pekka Suortti, Marie Jacquet, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Univ. of Helsinki, Dept. of Physics, ThomX, and Department of Physics
Subjects: Photon, Technology Assessment, Biomedical, ThomX, [PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph], Biophysics, General Physics and Astronomy, Synchrotron radiation, Electron, Radiation, Physics and Astronomy(all), Linear particle accelerator, law.invention, SYNCHROTRON-RADIATION, Radiotherapy, High-Energy, Optics, law, X-rays, Animals, Humans, COMPUTED-TOMOGRAPHY, Radiology, Nuclear Medicine and imaging, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics, Miniaturization, Interaction point, business.industry, General Medicine, Equipment Design, Compton source, 3126 Surgery, anesthesiology, intensive care, radiology, Laser, Equipment Failure Analysis, Radiation therapy, Radiology Nuclear Medicine and imaging, Physics::Accelerator Physics, Dose Fractionation, Radiation, Atomic physics, business, Storage ring, Synchrotrons
Abstract: The principle of the compact Compton source is presented briefly. In collision with an ultrarelativistic electron bunch a laser pulse is back-scattered as hard X-rays. The radiation cone has an opening of a few mrad, and the energy bandwidth is a few percent. The electrons that have an energy of the order of a few tens of MeV either circulate in storage ring, or are injected to a linac at a frequency of 10-100 MHz. At the interaction point the electron bunch collides with the laser pulse that has been amplified in a Fabry-Perot resonator. There are several machines in design or construction phase, and projected fluxes are 1012 to 10(14) photons/s. The flux available at 80 keV from the ThomX machine is compared with that used in the Stereotactic Synchrotron Radiation Therapy clinical trials. It is concluded that ThomX has the potential of serving as the radiation source in future radiation therapy programs, and that ThomX can be integrated in hospital environment. (C) 2015 Published by Elsevier Ltd on behalf of Associazione Italiana di Fisica Medica.
Published: 2015
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2. High intensity compact Compton X-ray sources: Challenges and potential of applications

Author: M. Jacquet, ThomX - Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, ThomX, business.industry, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], High intensity, Compton, Compact, Laser, Engineering physics, Imaging, law.invention, Cultural heritage, Optics, law, X-rays, 11. Sustainability, Femtosecond, business, Diffraction, Instrumentation, Working environment, High brightness
Abstract: Thanks to the exceptional development of high power femtosecond lasers in the last 15 years, Compton based X-ray sources are in full development over the world in the recent years. Compact Compton sources are able to combine the compactness of the instrument with a beam of high intensity, high quality, tunable in energy. In various fields of applications such as biomedical science, cultural heritage preservation and material science researches, these sources should provide an easy working environment and the methods currently used at synchrotrons could be largely developed in a lab-size environment as hospitals, labs, or museums.
Published: 2014
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3. Transport line for a multi-staged laser-plasma acceleration: DACTOMUS

Author: Nicolas Delerue, Brgitte Cros, Gillies Maynard, A. Specka, B. S. Paradkar, A. Chancé, Christelle Bruni, Patrick Mora, J. Schwindling, O. Delferrière, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), Ralph Assmann, Massimo Ferrario, Jens Osterhoff, Arnd E. Specka, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, business.industry, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Transfer line, Electron beams, Beam optics, Plasma acceleration, Laser, 01 natural sciences, 010305 fluids & plasmas, Pulse (physics), law.invention, Acceleration, Optics, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], law, 0103 physical sciences, Line (geometry), Cathode ray, 010306 general physics, business, Instrumentation, Realization (systems), Laser-plasma acceleration
Abstract: International audience; Laser-plasma acceleration is one of the most promising techniques to reach very high acceleration gradients up to a few hundreds of GeV/m. In order to push this acceleration scheme in the domain of the very high energies, the CILEX project was launched with the laser APOLLON. One of the main topics of this project is to study multi-staged acceleration. It consists in generating and pre-accelerating electrons in a first laser-plasma stage, to transport them up to a second stage where the electrons are accelerated again thanks to another laser pulse. The DACTOMUS project, based on a collaboration CEA-IRFU, CEA-IRAMIS, LAL, LPGP, LULI and LLR, aims at the study and realization of such a transfer line between these two stages. Firstly, a prototype will be developed and tested by the groups of CEA-IRAMIS-SPAM, LPGP, and LULI on the UHI100 facility(CEA-SPAM). This collaboration must enable to realize the first acceleration stage. For the transport line prototype, the main difficulties are to realize a very compact and energy accepting line with diagnostics to characterize the electron beam. We will present here the optics of this line, its performances and the inserted diagnostics.
Published: 2014
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4. Advanced positron sources

Author: Alessandro Variola, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ralph Assmann, Massimo Ferrario, Jens Osterhoff, and Arnd E. Specka
Subjects: Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Nuclear engineering, Context (language use), Pair creation, 7. Clean energy, law.invention, Nuclear physics, Plasma accelerator, Positron, law, Positron sources, Lepton colliders, Physics::Accelerator Physics, High Energy Physics::Experiment, Boundary value problem, Beam emittance, Collider, Instrumentation, Energy (signal processing), Lepton
Abstract: International audience; Positron sources are a critical system for the future lepton colliders projects. Due to the large beam emittance at the production and the limitation given by the target heating and mechanical stress, the main collider parameters fixing the luminosity are constrained by the e+e+ sources. In this context also the damping ring design boundary conditions and the final performance are given by the injected positron beam. At present different schemes are being taken into account in order to increase the production and the capture yield of the positron sources, to reduce the impact of the deposited energy in the converter target and to increase the injection efficiency in the damping ring. The final results have a strong impact not only on the collider performance but also on its cost optimization. After a short introduction illustrating their fundamental role, the basic positron source scheme and the performance of the existing sources will be illustrated. The main innovative designs for the future colliders advanced sources will be reviewed and the different developed technologies presented. Finally the positrons-plasma R&D experiments and the futuristic proposals for positron sources will reviewed.
Published: 2014
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5. Longitudinal profile monitor using smith-purcell radiation: Recent results from the E-203 Collaboration

Author: Delerue, N., Barros, J., Le Corre, S., Vieille Grosjean, M., Bakkali Taheri, F., Bartolini, R., Doucas, G., Ivan Konoplev, Perry, C., Reichold, A., Stevenson, S., Fuster Martinez, N., Andrews, H., Bharadwaj, V., Clarke, C., Labat, M., Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Los Alamos National Laboratory (LANL), University of Oxford [Oxford], SLAC National Accelerator Laboratory (SLAC), Stanford University, Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics::Optics, Physics::Accelerator Physics, [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract: TUPC38 - Work supported by seed funding from the John Fell Fund, University of Oxford, Université Paris-Sud, program "Attractivité" and by the ANR under contract ANR-12-JS05-0003-01; International audience; We report on recent measurements made at FACET by the E-203 collaboration to test a longitudinal bunch profile monitor based on Coherent Smith-Purcell radiation. The capacity of this monitor to resolve sub-picosecond bunches will be shown as well as a comparison of profile reconstructed for different beam compression settings. We will also present recent electromagnetic simulations of the interactions between the beam and the grating as well as the expected resolution of such monitor. Comparison between Coherent Smith-Purcell radiation measurement and those made with other techniques will also be discussed. Finally future upgrades of the experiment and steps toward the construction of a single shot longitudinal profile monitor will be presented.
Published: 2016

6. Reconstruction of the time profile of 20.35 GeV, subpicosecond long electron bunches by means of coherent Smith-Purcell radiation

Author: H. L. Andrews, N. Fuster-Martinez, Nicolas Delerue, V. Bharadwaj, C. Perry, Ivan Konoplev, Christine Clarke, M. Vieille-Grosjean, A. Reichold, Marie Labat, J. Barros, G. Doucas, S. Le Corre, F. Bakkali Taheri, S. Stevenson, Riccardo Bartolini, Los Alamos National Laboratory (LANL), University of Oxford [Oxford], Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), SLAC National Accelerator Laboratory (SLAC), Stanford University, Dept. Accelerateurs - ETALON, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), Synchrotron SOLEIL (SSOLEIL), and Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, business.industry, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Resolution (electron density), Surfaces and Interfaces, Grating, Radiation, Polarization (waves), 01 natural sciences, Root mean square, Nuclear physics, Wavelength, Optics, 0103 physical sciences, ETALON, lcsh:QC770-798, Physics::Accelerator Physics, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, 010306 general physics, business, Background radiation
Abstract: We have used coherent Smith-Purcell radiation (cSPr) in order to determine the temporal profile of sub-ps long electron bunches at the Facility for Advanced Accelerator Experimental Tests, at SLAC. The measurements reported here were carried out in June 2012 and April 2013. The rms values for the bunch length varied between 356 to 604 fs, depending on the accelerator settings. The resolution of the system was limited by the range of detectable wavelengths which was, in turn, determined by the choice of the grating periods used in these experiments and the achievable beam-grating separation. The paper gives the details of the various steps in the reconstruction of the time profile and discusses possible improvements to the resolution. We also present initial measurements of the polarization properties of cSPr and of the background radiation. © Published by the American Physical Society.
Published: 2016
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7. Comparison of Coherent Smith-Purcell Radiation and Coherent Transition Radiation

Author: Khodnevych, Vitalii, Bezshyyko, Oleg, Delerue, Nicolas, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs - ETALON, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and ETALON
Subjects: Accelerator Physics (physics.acc-ph), [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 06 Beam Instrumentation, Controls, Feedback and Operational Aspects, FOS: Physical sciences, Physics - Accelerator Physics, Accelerator Physics
Abstract: Smith-Purcell radiation and Transition Radiation are two radiative phenomenon that occur in charged particles accelerators. For both the emission can be significantly enhanced with sufficiently short pulses and both can be used to measure the form factor of the pulse. We compare the yield of these phenomenon in different configurations and look at their application as bunch length monitors, including background filtering and rejection. We apply these calculations to the specific case of the CLIO Free Electron laser., Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea
Published: 2016

8. First Measurements of Coherent Smith-Purcell Radiation in the SOLEIL Linac

Author: Delerue, Nicolas, Barros, Joanna, Hubert, Nicolas, Jenzer, Stéphane, Khodnevych, Vitalii, Labat, Marie, Malovytsia, Maksym, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Dept. Accelerateurs - ETALON, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), ETALON, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 06 Beam Instrumentation, Controls, Feedback and Operational Aspects, Physics::Accelerator Physics, [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 7. Clean energy, Accelerator Physics
Abstract: An experiment to measure the Coherent Smith-Purcell radiation has been installed in the SOLEIL Linac. Its aim is to produce a map of Smith-Purcell radiation emissions in several planes and compare it with theoretical predictions. Coherent Smith Purcell radiation is produced when a grating is brought close from a sufficiently short charged particles beam. The experiment consist of two detectors with 5 degrees of freedom. These two detectors can be moved around the emission point to measure the intensity of the radiation at different locations. Radiation maps are recorded parasitically by moving the detectors around during normal linac operations., Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea
Published: 2016

9. Experimental and Theoretical Studies of the Properties of Coherent Smith-Purcell Radiation

Author: Bakkali Taheri, Faissal, Barros, Joanna, Bartolini, Riccardo, Clarke, Christine, Delerue, Nicolas, Doucas, George, Konoplev, Ivan, Reichold, Armin, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs - ETALON, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ETALON, and Starita, Sabine
Subjects: 010308 nuclear & particles physics, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 0103 physical sciences, 06 Beam Instrumentation, Controls, Feedback and Operational Aspects, Physics::Accelerator Physics, [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 010306 general physics, 01 natural sciences, Accelerator Physics
Abstract: Previous studies have demonstrated that coherent Smith-Purcell radiation (cSPr) can be used for relativistic electron bunch time profile reconstruction at pico-second and femtosecond scales. The E203 experiments undertaken in May 2015 at FACET (SLAC) were dedicated to the study of some properties of cSPr, namely the azimuthal distribution and the polarization of the radiation. The experimental set up description which allowed such studies will be presented along with the results. To understand the experimental data both semi-analytical and numerical models were studied. The semi-analytical approach was based on the surface-current model, and the 3D particle-in-cell code VSim was used for numerical modeling. The experimental and theoretical studies are compared., Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea
Published: 2016

10. Study of Short Bunches at the Free Electron Laser CLIO

Author: Khodnevych, Vitalii, Berthet, Jean-Paul, Delerue, Nicolas, Glotin, Francois, Jenzer, Stéphane, Ortega, Jean-Michel, Prazeres, Rui, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs - ETALON, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and ETALON
Subjects: Accelerator Physics (physics.acc-ph), [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], FOS: Physical sciences, Physics::Accelerator Physics, Physics - Accelerator Physics, 02 Photon Sources and Electron Accelerators, Accelerator Physics
Abstract: CLIO is a Free Electron Laser based on a thermionic electron gun. In its normal operating mode it delivers electron 8 pulses but studies are ongoing to shorten the pulses to about 1 ps. We report on simulations showing how the pulse can be shortened and the expected signal yield from several bunch length diagnostics (Coherent Transition Radiation, Coherent Smith Purcell Radiation)., IPAC16 MOPMB005
Published: 2016

11. Comparison of the Smith-purcell Radiation Yield for Different Models

Author: Malovytsia, Maksym, Delerue, Nicolas, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs - ETALON, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), V.N. Karazin Kharkiv National University (KhNU), ETALON, and Starita, Sabine
Subjects: Accelerator Physics (physics.acc-ph), [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], FOS: Physical sciences, Physics::Accelerator Physics, 06 Beam Instrumentation, Controls, Feedback and Operational Aspects, [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics - Accelerator Physics, Accelerator Physics
Abstract: Smith-Purcell radiation is used in several applications including the measurement of the longitudinal profile of electron bunches. A correct reconstruction of such profile requires a good understanding of the underlying model. We have compared the leading models of Smith-Purcell radiation and shown that they are in agreement within the experimental errors., Comment: 3 pages, 3 figures, 1 table
Published: 2016
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12. Photon beam generation at PERLE

Author: Zomer, F., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DEPACC, Mighty Laser, and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2015

13. Developments of optical resonators and optical recirculators for Compton X/γ ray machines

Author: A. Martens, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Dept. Accelerateurs - ELI-NP, LAL - Laboratoire de l'Accelerateur Lineaire, ELI-NP, DEPACC, and Starita, Sabine
Subjects: Physics, [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Photon, business.industry, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Gamma ray, Physics::Optics, Particle accelerator, [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Electron, Laser science, Laser, 7. Clean energy, law.invention, Resonator, Optics, law, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Optoelectronics, Physics::Accelerator Physics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Collider, business
Abstract: International audience; Optical resonators and optical recirculators are key elements of Compton X/γ-ray machines. Such devices could ultimately be used in the design of polarized positron sources for a future linear electron-positron collider and photon sources for an hypothetical photon-photon collider. With regard to their use in laser physics or in time-frequency metrology, these devices have to obey severe constraints when implemented in the vacuum of an electron accelerator. Our group is developing both types of devices. An original recirculator design is being developed for the ELI-NP γ ray source. It is an aberration free device that recirculates 32 times a short and high intensity laser pulse. It also allows synchronizing each of the 32 passes with the electron RF cavities within approximately 100 fs. The second topic is a description of R&D on optical resonators dedicated to laser-electron interactions, in particular the ThomX Compton ring. Two different picosecond laser oscillators have been locked to the highest cavity finesse F=30000 ever reached in pulsed regime. We also designed and built a new kind of non-planar cavity, tetrahedron shape, providing circularly polarized eigenmodes. This cavity was installed in the ATF accelerator of KEK and successfully used to produce a high gamma ray flux. Thanks to an original fibre amplifier, 100 kW of average power were stacked inside the cavity.
Published: 2015

14. RF DESIGN OF A HIGH GRADIENT S-BAND TRAVELLING WAVE ACCELERATING STRUCTURE FOR THOMX LINAC

Author: El Khaldi, Mohamed, Garolfi, Luca, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 010308 nuclear & particles physics, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 0103 physical sciences, 7: Accelerator Technology, 01 natural sciences, 7. Clean energy, Accelerator Physics
Abstract: There is growing demand from the industrial and research communities for high gradient, compact RF accelerating structures. The Thomx high gradient structure (HGS) is travelling wave (TW), quasi constant gradient section and will operate at 2998.55 MHz (30°C in vacuum) in the 2π/3 mode. The optimization of the cell shape (Electromagnetic design) has been carried out with the codes HFSS and CST MWS, in order to improve the main RF characteristics of the cavity such as shunt impedance, accelerating gradient, group velocity, modified Poynting vector, surface fields, etc. Prototypes with a reduced number of cells have been designed. For an input power of about 20 MW, EM simulation results show that an average accelerating gradient of 28 MV/m is achieved which corresponds to a peak accelerating gradient of 35 MV/m, a peak surface gradient of 44 MV/m and peak modified Poynting vector S_{cmax} of 0.24 MW/mm²., Proceedings of the 6th Int. Particle Accelerator Conf., IPAC2015, Richmond, VA, USA
Published: 2015

15. 3 GHz Single Cell Cavity Optimization Design

Author: Garolfi, L., Khaldi, M. El, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract: International audience; In order to develop a high gradient S-band acceleratingstructure, an optimized travelling wave (TW) single-cellcavity operating at the frequency of 2998.55 MHz at 30C with 2pi/3 phase advance, is proposed. Starting fromthe well-known accelerating cells design developed byLAL and SLAC for linear accelerators; it is possible toimprove the main RF parameters, such as quality factor, shunt impedance and group velocity, by choosing a suitableshape of the inner surface. Despite the surface electric field being considered as the only main quantity limiting theaccelerating gradient; the importance of power flow has resulted from high-gradient experimental data. In this context,the modified Poynting vector quantity can be considered as a new RF breakdown constraint depending on an iris shape.RF simulations have been carried out with HFSS and CST MWS. Simulations results have shown an optimal RF characteristics.
Published: 2015

16. A laser beam circulator for high spectral brightness γ-beam source

Author: Cassou, K., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2015

17. Alignment survey of previous IPBPMs

Author: Wallon, S., Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2015

18. Pugwash : les physiciens, l’arme nucléaire, la responsabilité des scientifiques

Author: Nicolas Delerue, Jacques Bordé, Annick Suzor-Weiner, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Photophysique Moléculaire (PPM), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-SOC-PH]Physics [physics]/Physics [physics]/Physics and Society [physics.soc-ph], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], General Medicine, [SDE.ES]Environmental Sciences/Environmental and Society
Abstract: National audience; Dans les années qui suivirent la Seconde Guerre mondiale, les physiciens réalisèrent que la bombe qu’ils avaient construite était en train de leur échapper. Afin de promouvoir un usage pacifique de la science, ils fondèrent le Mouvement Pugwash, qui agit en coulisse en faveur de la paix dans le monde et a été l’un des instigateurs du traité sur la non-prolifération. Il a reçu en 1995 le prix Nobel de la Paix, et encore récemment a contribué à convaincre le gouvernement syrien de détruire ses armes chimiques.L’évolution actuelle est à l’ouverture, vers les scientifiques de toutes disciplines, mais aussi vers un large public qui doit être informé et associé à la réflexion sur les conditions de survie de l’humanité, et de sa survie en paix.
Published: 2015
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19. Performances of the Alpha-X RF gun on the PHIL accelerator at LAL

Author: Christelle Bruni, R. Roux, S. Chancé, Gang Xu, J.N. Cayla, J. Brossard, T. Vinatier, H. Monard, V. Chaumat, PHIL-Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire d'Etudes des Eléments Légers (LEEL - UMR 3685), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), DEPACC, Alpha-X, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Electron beam, Nuclear and High Energy Physics, Beam dynamics, business.industry, RF-gun, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Solenoid, 7. Clean energy, Nuclear physics, Transverse plane, Optics, Magnet, Cathode ray, Photocathodes, Physics::Accelerator Physics, Thermal emittance, Coaxial, Schottky effect, business, Instrumentation, Beam (structure), Electron gun
Abstract: International audience; The Alpha-X RF-gun was designed to produce an ultra-short (
Published: 2015
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20. The ABCD matrix for parabolic reflectors and its application to astigmatism free four-mirror cavities

Author: Fabian Zomer, K. Dupraz, A. Martens, Kevin Cassou, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Materials science, Optical alignment, Stacking, Physics::Optics, Astigmatism, 01 natural sciences, law.invention, 010309 optics, Matrix (mathematics), Optics, law, 0103 physical sciences, medicine, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Electrical and Electronic Engineering, Physical and Theoretical Chemistry, 010306 general physics, Optical cavity, Alignment, Ray transfer matrix analysis, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Parabolic reflector, business.industry, Parabolic mirror, medicine.disease, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Power (physics), ABCD matrix, Physics::Accelerator Physics, business, Simulation
Abstract: International audience; The ABCD matrix for parabolic reflectors is derived for any incident angles. It is used in numerical studies of four-mirror cavities composed of two flat and two parabolic mirrors. Constraints related to laser beam injection efficiency, optical stability, cavity-mode, beam-waist size and high stacking power are satisfied. A dedicated alignment procedure leading to stigmatic cavity-modes is employed to overcome issues related to the optical alignment of parabolic reflectors.
Published: 2015
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21. Study of Phase Reconstruction Techniques applied to Smith-Purcell Radiation Measurements

Author: Delerue, Nicolas, Barros, Joanna, Bezshyyko, Oleg, Khodnevych, Vitalii, Dept. Accelerateurs - ETALON, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Accelerator Physics (physics.acc-ph), [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], FOS: Physical sciences, Physics - Accelerator Physics
Abstract: Measurements of coherent radiation at accelerators typically give the absolute value of the beam profile Fourier transform but not its phase. Phase reconstruction techniques such as Hilbert transform or Kramers Kronig reconstruction are used to recover such phase. We report a study of the performances of these methods and how to optimize the reconstructed profiles.
Published: 2015

22. Quelle est la nature de la lumière ? Discrète ou continue ?

Author: Delerue, N., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Hors Equipe
Subjects: [PHYS.PHYS.PHYS-POP-PH]Physics [physics]/Physics [physics]/Popular Physics [physics.pop-ph]
Abstract: National audience; La nature de la lumière est un problème qui fascine les physiciens depuis très longtemps. Est-elle discrète ou continue ? Est-ce une onde ou une particule ? Descartes, Newton et Einstein s’y sont intéressé sans trouver une explication acceptable. Le XXème siècle nous a apporté son lot de surprises…
Published: 2015

23. Status of Fast Luminosity Monitoring Using Diamond Sensors For SuperKEKB

Author: Khechen, D. El, Bambade, P., Jehanno, D., Kubytskyi, V., Rimbault, C., Starita, Sabine, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract: International audience; The SuperKEKB e+e- collider aims to reach a very highluminosity of 8 1035 cm-2s-1, using strongly focused ultra-low emittance bunches colliding every 4ns. A fastluminosity monitoring system is required for luminosityfeedback and control in the presence of dynamic imperfections,as well as for luminosity optimisation. A relativeprecision of about 10−3 in 1ms is specified, which can beachieved thanks to the very large cross-section of the radiative Bhabha process at zero degree scattering angle. The technologyused is based on diamond sensors, to be placed just outside the beam pipe, downstream of the interaction point, atlocations with event rates consistent with the aimed precision and small enough contamination from single-beam particlelosses. We will present estimates of the precisions which can be effectively reached considering several beam-pipe geometriesand materials at the selected location, along with a preliminary study of single beam losses expected at the detectorlocation. The status of on-going testing and preparation of the first diamond sensor and fast readout electronics to be usedin the single beam commissioning phase will also be reported.
Published: 2015

24. ICOSIM++: a Simulation Tool for Crystal Aided Collimation Experiments

Author: Zhang, J., Chance, S., Demma, T., Variola, A., Montesano, S., Scandale, W., Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), European Organization for Nuclear Research (CERN), and UA9
Subjects: Physics::Accelerator Physics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation
Abstract: Proceedings to appear in NIM B; International audience; UA9 is the crystal-assisted collimation experiment at CERN. In the SPS this experiment successfully demonstrated that bent crystals can work as "smart deflectors" on primary halo particles. The final goal is to use this technique for LHC collimation. A prototype of crystal aided collimation system was installed in the LHC in March 2014. To understand thoroughly the experimental data, and to prepare the future UA9 experiment in LHC, the simulation of the beam collimation process is a fundamental ingredient. Here we present the C++ based tracking code ICOSIM++ that was specifically designed to simulate the collimation of a particle beam in a circular accelerator. The interaction of the beam halo particles with the collimators is treated either by calling tabulated cross-sections or by a call to FLUKA. An interface connecting ICOSIM++ to a Fortran routine simulating the interaction of a proton with a crystal has been added recently. This makes ICOSIM++ an ideal and flexible tool to study crystal collimation. Furthermore, the energies and trajectories of the lost particles are registered for further analysis. Tracking simulation results for the SPS will be shown and compared with SixTrack simulation results.
Published: 2014

25. Compact x-ray sources

Author: Variola, A., Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph]
Published: 2014

26. Real-Time Display System for the Optical Fiber Beam Loss Monitor for the PHIL and ThomX Facilities

Author: Chaikovska, I., Delerue, N., Alessandro Variola, ThomX - PHIL - Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: PHIL, ThomX, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics::Accelerator Physics, [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph]
Abstract: TUPD23; Fiber monitors are an attractive beam loss diagnostics tool. They are based on the detection of the electromagnetic shower produced by the main beam losses. Cherenkov radiation is produced by the electromagnetic shower charged particles within the multimode fibers attached to the vacuum chamber. It is consequently converted to an electrical signal containing the information about the position and intensity of the beam losses. Therefore, a system based on the fibers installed alongside the whole accelerator togetherwith the signal detection system forms a continuous, real-time Fiber Beam LossMonitor (FBLM). In this context, the FBLM is a very useful tool for the commissioning and beam alignment. In this article we report on the development of the real-time display system for the FBLM at PHIL (PHotoInjector at LAL, Orsay, France) as a prototype of the beamloss monitor for the ThomX project, the compact Compton based X-ray source under construction in Orsay.
Published: 2014

27. RF Coaxial Resonator for Investigating Multipactor Discharges on Metal and Dielectric Surfaces

Author: El Khaldi, M., Kaabi, W., Lepercq, P., Peinaud, Y., Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract: http://accelconf.web.cern.ch/AccelConf/LINAC2014/html/auth0693.htmTHPP096; International audience; Multipactor discharge is a phenomenon in which electrons impact one or more material surfaces in resonance with an alternating electric field. The discharge can occur for a wide range of frequencies, from the MHz range to tens of GHz, and in wide array of geometries if the impacted surface has a secondary electron emission (SEE) yield larger than one. The discharge can take place on a single surface or between two surfaces. A novel coaxial resonator to investigate two-surface multipactor discharges on metal and dielectric surfaces in the gap region under vacuum conditions has been designed and tested. The resonator is ~ 100 mm in length with an outer diameter of ~ 60 mm (internal dimensions). A pulsed RF source delivers up to 30 W average power over a wide frequency range 650-900 MHz to the RF resonator. The incident and reflected RF signals are monitored by calibrated RF diodes. An electron probe provides temporal measurements of the multipacting electron current with respect to the RF power. These experiments were successful in identifying multipacting and allowed us the evaluation of a home made sputtered titanium nitride (TiN) thin layers as a Multipactor suppressor.
Published: 2014

28. Effect of Beam Dynamics Processes in the Low Energy Ring ThomX

Author: Delerue, Nicolas, Bruni, Christelle, Chaikovska, Iryna, Drebot, Illya, Jacquet, Marie, Loulergue, Alexandre, Variola, Alessandro, Zomer, Fabian, Starita, Sabine, Christine Petit-Jean-Genaz, Gianluigi Arduini, Peter Michel, Volker RW Schaa, ThomX - Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Accelerator Physics (physics.acc-ph), ThomX, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Astrophysics::High Energy Astrophysical Phenomena, A16 Advanced Concepts, FOS: Physical sciences, Physics::Accelerator Physics, 02 Synchrotron Light Sources and FELs, [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics - Accelerator Physics, 7. Clean energy, Accelerator Physics
Abstract: As part of the R\&D for the 50 MeV ThomX Compton source project, we have studied the effect of several beam dynamics processes on the evolution of the beam in the ring. The processes studied include among others Compton scattering, intrabeam scattering, coherent synchrotron radiation. We have performed extensive simulations of a full injection/extraction cycle (400000 turns). We show how each of these processes degrades the flux of photons produced and how a feedback system contributes to recovering most of the flux., Submitted to IPAC'14, WEPRO001
Published: 2014

29. Length Measurement of High-brightness Electron Beam thanks to the 3-Phase Method

Author: Vinatier, Thomas, Bruni, Christelle, Chancé, Sophie, Puzo, Patrick, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Christine Petit-Jean-Genaz, Gianluigi Arduini, Peter Michel, and Volker RW Schaa
Subjects: 03 medical and health sciences, 0302 clinical medicine, 010308 nuclear & particles physics, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 0103 physical sciences, T03 Beam Diagnostics and Instrumentation, Physics::Accelerator Physics, 01 natural sciences, 030218 nuclear medicine & medical imaging, Accelerator Physics, 06 Instrumentation, Controls, Feedback & Operational Aspects
Abstract: The goal of 3-phase method is to determine the length of an electron beam without dedicated diagnostics by varying the measurement conditions of its energy spread, through a change in the RF phase of an accelerating structure. The originality here comes from the fact that it is applied on high-brightness electron beams of few MeV generated by RF photo-injectors. It allows testing the accuracy of 3-phase method, since the length to reconstruct is known as being that of the laser pulse generating the beam. It requires establishing the longitudinal transfer matrix of a RF photo-injector, which is difficult since the electron velocity vary from 0 to relativistic during its path*. The 3-phase method in RF photo-injector has been simulated by ASTRA and PARMELA codes, validating the principle of the method. First measurement has been done on PHIL accelerator at LAL, showing a good agreement with the expected length. I will then show results obtained at PITZ with a standing wave booster and a comparison with those coming from a Cerenkov detector. Finally, measurements at higher energy performed on the SOLEIL LINAC with travelling wave accelerating structures will be exposed., Proceedings of the 5th Int. Particle Accelerator Conf., IPAC2014, Dresden, Germany
Published: 2014

30. Optical fiber beam loss monitor for the PHIL and ThomX facilities

Author: Chaikovska, Iryna, Burmistrov, Leonid, Delerue, Nicolas, Variola, Alessandro, ThomX - PHIL - Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Christine Petit-Jean-Genaz, Gianluigi Arduini, Peter Michel, and Volker RW Schaa
Subjects: ThomX, PHIL, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], T03 Beam Diagnostics and Instrumentation, Physics::Accelerator Physics, Accelerator Physics, 06 Instrumentation, Controls, Feedback & Operational Aspects
Abstract: Fiber beam loss monitor (FBLM) is an attractive solution to measure intensity and position of the beam losses in the real time. It is a very useful tool, especially, for the commissioning and beam alignment. In this article we report on the development of the FBLM at PHIL (PHotoinjector at LAL, Orsay, France) as a prototype of the beam loss monitor for the ThomX machine, the compact Compton based X-ray source being in the construction phase in Orsay., Proceedings of the 5th Int. Particle Accelerator Conf., IPAC2014, Dresden, Germany
Published: 2014

31. Reconstruction of longitudinal electrons bunch profiles at FACET, SLAC

Author: Vieille Grosjean, Mélissa, Bakkali Taheri, Faissal, Barros, Joanna, Clarke, Christine, Delerue, Nicolas, Doucas, George, Jenzer, Stéphane, Konoplev, Ivan, Reichold, Armin, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs - ETALON, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), University of Oxford [Oxford], SLAC National Accelerator Laboratory (SLAC), Stanford University, Christine Petit-Jean-Genaz, Gianluigi Arduini, Peter Michel, and Volker RW Schaa
Subjects: 03 medical and health sciences, 0302 clinical medicine, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], T03 Beam Diagnostics and Instrumentation, Physics::Optics, Physics::Accelerator Physics, 030218 nuclear medicine & medical imaging, Accelerator Physics, 06 Instrumentation, Controls, Feedback & Operational Aspects
Abstract: The E-203 collaboration is testing a device on FACET at SLAC to measure the longitudinal profile of electron bunches using Smith-Purcell radiation. At FACET the electron bunches have an energy of 20GeV and a duration of a few hundred femtoseconds. Smith-Purcell radiation is emitted when a charged particle passes close to the surface of a metallic grating. The set-up installed in FACET consists in four targets (three gratings and a blank) on a carrousel on one side and eleven pyroelectric detectors on the opposite side, the beam passing between. At the moment, the measurement is averaged over a hundred pulses or more. We have studied the stability of the measurement from pulse to pulse and the resolution of the measure depending on the number of grating used., Proceedings of the 5th Int. Particle Accelerator Conf., IPAC2014, Dresden, Germany
Published: 2014

32. Effect of Beam-grating Separation on Longitudinal Profile Reconstruction using Smith-Purcell Radiation and Recent Upgrade to E203

Author: Barros, J., Dept. Accelerateurs - ETALON, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph]
Abstract: THPME085 - Financially supported by the Université Paris-Sud (programme attractivité") and the French ANR (contract ANR-12-JS05-0003-01).; On the FACET facility at SLAC, the E203 collaboration uses Smith-Purcell radiation to reconstruct longitudinal beam profiles non-destructively. In order to increase the detected signal, the grating needs to be placed as close as possible from the beam, but without interfering with it. We report on a comparison of several reconstructions from the same dataset by using different values of the beam-grating separation and we give an estimate of the error in the profile determination due to position uncertainty. We also present how using a new motor system and a dedicated wire scanner can increase the accuracy of the beam-grating separation measurement.
Published: 2014

33. Optimization of flat top of high pulsed power waveform by wavelet analysis

Author: Babigeon, J.-L., Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph]
Abstract: Accelerator physics for elementary particle colliders : topics linked with time frequency domain tuning of Pulse Forming Network in High Pulsed Power sources Particle physics needs high quality beams for reaching a minimum of energy/position dispersion (low emittance)colliding bunches. It means in first, constant flat top of pulsed power sources, like High Voltage modulators. Conventional micro seconde one, already lie on Pulse Forming Network (PFN), which proper tuning influence the minimum ripple on wave form. That tuning is not trivial. tuning of Pulse Forming Network in High Pulsed Power sources The goal of the machines like Large hadron Collider LHC at CERN, is to generate collision of packets of particles with a high definition in energy/momentum, hence a small dispersion. In fact, the ''emittance'', which is the volume of X,P in phase space, must be the smallest as possible. For that, the impulse power sources must deliver an electrical, ideally ''flat top'' (inside that plateau, the energy of emitted particles is constant), so unlike signal recognition or transmissions for example, for today accelerators the performances are not yet axed on rising or falling time (however it could be the case in future high frequency machines). The resulting spectrum of power waveforms is then dominated by its pass-band character. To improve the flat top, we need to develop and tune some passive Pulse Forming Network PFN, and their performance must reach some per mill of the High voltage, regarding the relative amplitude of the ripples in the flat top. The problem of optimal tuning seems to lie in ''control and optimization'' class. In our machine, it depends on 12 continuous variables, who are the values of tunable power inductances. The PFN is a 12-strongly coupled harmonic oscillator (many bodies problem), and the optimal tuning state is not described by a trivial algorithm. What we need is to find a control and optimization method, either by analytical -if possible- approach, either by analysis of measurement during tuning. As classically, the time or frequency waveforms do not help us to improve the tuning, essentially because in time measurements, 2 distant cells of PFN may interfere with unknown phases. Naturally the Frequency transform doesn't allow us to catch that hidden information. We then used a wavelet toolbox, with scilab, and as we met some difficulties in the dynamic range of our waveforms with that toolbox, we are presently conducting some direct investigations with for example complex morlet wavelets. We shall describe the first results. In alternative approach, we try to solve the correspondent evolution equation, which belongs to Hill family, because it is linked with a pseudo transmission line with inhomogeneous characteristic impedance. We have extrapolated the Flocquet method by infinite determinants, but in synthesis like algorithm. We shall also discuss these first progresses. Considerations on mixed/intricate time frequency analysis Inside the same problem, we try to answer to another different question : is there a class of transform which would use a ''mixed variable'' which we call for example w. For sake of simplicity, w is complex and we have w= g(f,t) (or g(a,t) where a is the scale parameter of wavelet formalism). All our measurement V(t) or V(f) should be then transformed/mapped to V(w) where V is the High voltage image of the power source. To make our question or formalism useful, we have to restrict the features of g. We try to discuss these restrictions regarding the general aspects of g, (symmetries, deterministic category then metric abscissa ?...) and also investigation on the ''visibility'' of V(w), as measurement tool in signal recognition. It is not mandatory to closely link that question to precedent theme. We intend to discuss/list some -linear or not- representations different from the couple translation/rotation. That discussion and these ideas could help us in many other topics of the physic, like Electromagnetic field measurements (photo emission assisted by Schottky effect) for femtosecond electrons bunches. That issue could also be beneficial in other scientific researches.
Published: 2014

34. Development of optical cavity systems for advanced photon sources

Author: Delerue, N., Dept. Accelerateurs - MightyLaser, Laboratoire de l'Accélérateur Linéaire (LAL), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], ComputingMilieux_COMPUTERSANDSOCIETY, MightyLaser
Abstract: On behalf of the MightyLaser Collaboration
Published: 2014

35. Collaboration on fast luminosity measurements and MDI questions for super B meson factories

Author: Rimbault, C., Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Published: 2014

36. Da\phi ne gamma-rays factory

Author: Alesini, D., Chaikovska, I., Guiducci, S., Milardi, C., Variola, A., Zobov, M., Zomer, F., Laboratori Nazionali di Frascati (LNF), Istituto Nazionale di Fisica Nucleare (INFN), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Astrophysics::High Energy Astrophysical Phenomena, gamma ray sources, gamma-ray apparatus, IP networks, Bandwidth, storage rings, Colliding beam accelerators, adopted laser wavelength, DA-Phi-NE gamma-rays factory, photon collider, Fabry-Perot optical resonator, nuclear physics experiments, radioactive sources, longitudinal electron beam dynamics, gamma beam source, Electron beams, [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], gamma-rays, particle accelerators, Compton collisions, Photonics, Couplings, spectral density, Physics::Accelerator Physics, Physics - Accelerator Physics, Compton scattering, Laser beams
Abstract: Gamma sources with high flux and spectral densities are the main requirements for new nuclear physics experiments to be performed in several worldwide laboratories and envisaged in the ELI-NP (Extreme Light Infrastructure-Nuclear Physics) project or in the IRIDE (Interdisciplinary Research Infrastructure with Dual Electron Linacs) proposals. The paper is focalized on an experiment of gamma photons production using Compton collisions between the DA\Phi NE electron beam and a high average power laser pulse, amplified in a Fabry-P\'erot optical resonator. The calculations show that the resulting gamma beam source has extremely interesting properties in terms of spectral density, energy spread and gamma flux comparable (and even better) with the last generation gamma sources. The energy of the gamma beam depends on the adopted laser wavelength and can be tuned changing the energy of the electron ring. In particular we have analyzed the case of a gamma factory tunable in the 2-9 MeV range. The main parameters of this new facility are presented and the perturbation on the transverse and longitudinal electron beam dynamics is discussed. A preliminary accelerator layout to allow experiments with the gamma beam is presented with a first design of the accelerator optics., Comment: 26 pages, 15 figures
Published: 2014
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37. Equilibrium energy spread and emittance in a Compton ring: An alternative approach

Author: Alessandro Variola, I. Chaikovska, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Compton scattering, Extrapolation, Surfaces and Interfaces, Compton wavelength, Radiation, 01 natural sciences, 7. Clean energy, Computational physics, Cross section (physics), Quantum mechanics, 0103 physical sciences, lcsh:QC770-798, Thermal emittance, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Quantum fluctuation
Abstract: In this article the Campbell's theorem is used to evaluate the equilibrium emittance and energy spread in a Compton ring. This method allows us to have an efficient analytical approach separating the contributions of the Compton cross section from the luminosity factor. The consequent advantage is given by the possibility to have an easy extrapolation for the ``nonclassical'' cases like the polarized Compton backscattering or the evaluation of the equilibrium given by different radiation mechanisms. The effects accounting for the polarized Compton backscattering in the article are evaluated numerically. The analytical results in the nonpolarized case and in the negligible recoil effect approximation are in excellent agreement with the values obtained by matching the Compton damping rate with the quantum fluctuations, and they show that the equilibrium energy spread and emittance are independent from the luminosity.
Published: 2014
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38. Real defects, examples, classification at XFEL

Author: Kaabi, W., Dept. Accelerateurs - XFEL, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and TESLA
Subjects: [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Published: 2014

39. XFEL couplers

Author: Kaabi, W., Dept. Accelerateurs - XFEL, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), TESLA, and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Published: 2014

40. X-rays from Compton compact sources for medical applications

Author: Jacquet, M., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ThomX - Dept. Accelerateurs, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ThomX, and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-MED-PH] Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], ThomX, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2014

41. Sources d'électrons

Author: Monard, H., Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Published: 2014

42. Developments of optical resonators and optical recirculators for Compton X/gamma ray machines

Author: Martens, A., Dept. Accelerateurs, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Published: 2014

43. Enhanced high harmonic generation driven by high-intensity laser in argon gas-filled hollow core waveguide

Author: S. Daboussi, Dominique Descamps, Eric Mével, Olivier Guilbaud, Eric Constant, Sophie Kazamias, Ondrej Hort, Stéphane Petit, Kevin Cassou, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre Laser de l'Université Paris Sud (CLUPS), Université Paris-Sud - Paris 11 (UP11), Centre Laser de l'Université Paris Sud (CLUPS), Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), LASERIX, Laboratoire de l'Accélérateur Lineaire, University of Tunis El Manar, Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Free electron model, Waveguide (electromagnetism), chemistry.chemical_element, 01 natural sciences, NM, law.invention, 010309 optics, COHERENT, Harmonic spectrum, Optics, law, Ionization, 0103 physical sciences, High harmonic generation, FIELD, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Physics, [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Argon, business.industry, HIGH-ORDER HARMONICS, COHERENT, IONIZATION, INJECTION, PULSES, FIELD, NM, Laser, Atomic and Molecular Physics, and Optics, PULSES, HIGH-ORDER HARMONICS, chemistry, IONIZATION, Atomic physics, INJECTION, business, Doppler broadening
Abstract: We show that a significant enhancement of the photon flux produced by high harmonic generation can be obtained through guided configuration at high laser intensity largely above the saturation intensity. We identify two regimes. At low pressure, we observe an intense second plateau in the high harmonic spectrum in argon. At relatively high pressure, complex interplay between strongly time-dependent ionization processes and propagation effects leads to important spectral broadening without loss of spectral brightness. We show that the relevant parameter for this physical process is the product of laser peak power by gas pressure. We compare source performances with high harmonic generation using a gas jet in loose focusing geometry and conclude that the source developed is a good candidate for injection devices such as seeded soft x-ray lasers or free electron lasers in the soft x-ray range.
Published: 2014
Full Text: View/download PDF

44. Status of Diamond Detector Development for Beam Halo Investigation at ATF2

Author: Liu, Shan, Bambade, Philip, Bogard, Frédéric, Cayla, Jean-Noël, Fuster-Martínez, Nuria, Khvastunov, Illia, Monard, Hugues, Sylvia, Christophe, Tauchi, Toshiaki, Terunuma, Nobuhiro, Vinatier, Thomas, Starita, Sabine, Christine Petit-Jean-Genaz, Gianluigi Arduini, Peter Michel, Volker RW Schaa, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), KEK (High energy accelerator research organization), Christine Petit-Jean-Genaz, Gianluigi Arduini, Peter Michel, Volker RW Schaa, ATF, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: 03 medical and health sciences, 0302 clinical medicine, Physics::Instrumentation and Detectors, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], T03 Beam Diagnostics and Instrumentation, Physics::Accelerator Physics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 030218 nuclear medicine & medical imaging, Accelerator Physics, 06 Instrumentation, Controls, Feedback & Operational Aspects
Abstract: We are developing a diamond detector for beam halo and Compton spectrum diagnostics after the interaction point (IP) of ATF2, a low energy (1.3 GeV) prototype of the final focus system for ILC and CLIC linear collider projects. Tests of a 500 μm thick sCVD diamond detector with a dimension of 4.5 mm×4.5 mm have been carried out with radioactive sources and with electron beam from PHIL low energy (, Proceedings of the 5th Int. Particle Accelerator Conf., IPAC2014, Dresden, Germany
Published: 2014

45. Design and optimization of a highly efficient optical multipass system for γ -ray beam production from electron laser beam Compton scattering

Author: A. Courjaud, A. C. Mueller, Fabian Zomer, Paolo Tomassini, P. Fichot, G. Gatti, K. Dupraz, A. Ghigo, J. Y. Riou, A. Martens, T. Hovsepian, F. Wang, Frédéric Druon, Alessandro Variola, E. Mottay, Kevin Cassou, Luca Serafini, A. Stocchi, Luigi Palumbo, Nicolas Delerue, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Charles Fabry / Lasers, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), Laboratori Nazionali di Frascati (LNF), Istituto Nazionale di Fisica Nucleare (INFN), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], and Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN)
Subjects: Nuclear and High Energy Physics, Extreme Light Infrastructure, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Electron, 01 natural sciences, 7. Clean energy, law.invention, 010309 optics, Optics, law, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, 010306 general physics, Laser beams, Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Compton scattering, Surfaces and Interfaces, Polarization (waves), Laser, Cathode ray, Physics::Accelerator Physics, lcsh:QC770-798, Radio frequency, business
Abstract: A new kind of nonresonant optical recirculator, dedicated to the production of $\ensuremath{\gamma}$ rays by means of Compton backscattering, is described. This novel instrument, inspired by optical multipass systems, has its design focused on high flux and very small spectral bandwidth of the $\ensuremath{\gamma}$-ray beam. It has been developed to fulfill the project specifications of the European Extreme Light Infrastructure ``Nuclear Pillar,'' i.e., the Gamma Beam System. Our system allows a single high power laser pulse to recirculate 32 times synchronized on the radio frequency driving accelerating cavities for the electron beam. Namely, the polarization of the laser beam and crossing angle between laser and electrons are preserved all along the 32 passes. Moreover, optical aberrations are kept at a negligible level. The general tools developed for designing, optimizing, and aligning the system are described. A detailed simulation demonstrates the high efficiency of the device.
Published: 2014
Full Text: View/download PDF

46. ThomX Technical Design Report

Author: Variola, A., Haissinski, J., Loulergue, A., Zomer, F., (eds, ThomX - Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Published: 2014

47. Particle Accelerators I: How to produce protons for the LHC (or electrons for the ILC)

Author: Delerue, N., Starita, Sabine, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph]
Published: 2014

48. La relativité générale déforme l’espace-temps

Author: Delerue, N., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Hors Equipe, and Starita, Sabine
Subjects: [PHYS.PHYS.PHYS-POP-PH]Physics [physics]/Physics [physics]/Popular Physics [physics.pop-ph], [PHYS.PHYS.PHYS-POP-PH] Physics [physics]/Physics [physics]/Popular Physics [physics.pop-ph]
Abstract: National audience; Avec la relativité restreinte, Albert Einstein introduit une relation entre espace et temps. Mais cette théorie ne décrit pas correctement les effets de la gravitation. Il complète donc son approche et fonde la théorie de la relativité géné- rale où la matière déforme l’espace-temps.
Published: 2014

49. Compact x-ray sources for clinical applications

Author: Jacquet, M., Starita, Sabine, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ThomX - Dept. Accelerateurs, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and ThomX
Subjects: ThomX, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], [PHYS.PHYS.PHYS-ACC-PH] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2014

50. On the suitability of longitudinal profile measurements using Coherent Smith-Purcell radiation for high current proton beams

Author: Barros, J., Delerue, N., Vieille-Grosjean, M., Dolenc Kittelmann, I., Thomas, C., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Dept. Accelerateurs - ETALON, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Christine Petit-Jean-Genaz, Gianluigi Arduini, Peter Michel, and Volker RW Schaa
Subjects: Accelerator Physics (physics.acc-ph), [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics::Optics, Physics::Accelerator Physics, FOS: Physical sciences, Physics - Accelerator Physics
Abstract: The use of Smith-Purcell radiation to measure electrons longitudinal profiles has been demonstrated at several facilities in the picosecond and sub-picosecond range. There is a strong interest for the development of non intercepting longitudinal profile diagnostics for high current proton beams. We present here results of simulations on the expected yield of longitudinal profile monitors using Smith-Purcell radiation for such proton beams., Comment: Presented at IPAC 2014 - THPME089
Published: 2014
Full Text: View/download PDF

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