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6 results on '"Francesco Canella"'

1. Carrier-envelope offset frequency measurement by means of an external optical resonator

Author

Dario Giannotti, Edoardo Suerra, Francesco Canella, Simone Cialdi, Paolo Laporta, and Gianluca Galzerano

Subjects
optical frequency comb (OFC), optical cavity, carrier-envelope offset frequency, Pound–Drever–Hall laser frequency stabilization, active stabilization, Physics, QC1-999
Abstract

A general-purpose method based on the implementation of the asymmetric Pound–Drever–Hall (PDH) technique is proposed to measure the carrier-envelope offset (CEO) frequency of a mode-locked laser using an external optical cavity. By analyzing the synchronously demodulated signal of the spectrally filtered cavity reflection when the optical resonator is locked to the mode-locked laser, a discriminating signal depending on the relative frequency offset between the mode-locked and optical cavity comb-like spectra is obtained. For a given geometry and group delay dispersion (GDD) of the cavity parameters (i.e., a known cavity mode offset), this signal can be used to retrieve the laser CEO. This approach turns out to be advantageous in terms of setup complexity with respect to other well-known techniques that rely on non-linear frequency generation, such as f–2f interferometers. In addition, this method can be used to precisely determine the laser–cavity spectral coupling, which is an important topic in cavity-enhanced spectroscopy and non-linear optics applications. After the theoretical description of the generalized asymmetric PDH signal, an experimental validation of the proposed method is reported using an Er-doped fiber frequency comb source centered at 1,550 nm, with a repetition rate of 250 MHz, locked to a linear optical cavity with a 1 GHz free spectral range. The theoretical effect of the GDD is confirmed experimentally using different cavity configurations. Moreover, the comparison with the CEO frequency values measured using an f–2f interferometer demonstrates the feasibility of the proposed method.

Published
2023
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2. BriXs Ultra High Flux Inverse Compton Source Based on Modified Push-Pull Energy Recovery Linacs

Author

Illya Drebot, Alberto Bacci, Angelo Bosotti, Francesco Broggi, Francesco Canella, Paolo Cardarelli, Simone Cialdi, Luigi Faillace, Gianluca Galzerano, Mauro Gambaccini, Dario Giannotti, Dario Giove, Giovanni Mettivier, Paolo Michelato, Laura Monaco, Rocco Paparella, Gianfranco Paternó, Vittoria Petrillo, Francesco Prelz, Marcello Rossetti Conti, Andrea Renato Rossi, Paolo Russo, Antonio Sarno, Edoardo Suerra, Angelo Taibi, and Luca Serafini

Subjects
brixs, compton X-ray source, energy recovery, Physics, QC1-999, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

We present a conceptual design for a compact X-ray Source BriXS (Bright and compact X-ray Source). BriXS, the first stage of the Marix project, is an Inverse Compton Source (ICS) of X-ray based on superconducting cavities technology for the electron beam with energy recirculation and on a laser system in Fabry-Pérot cavity at a repetition rate of 100 MHz, producing 20−180 keV monochromatic X-Rays devoted mainly to medical applications. An energy recovery scheme based on a modified folded push-pull CW-SC twin Energy Recovery Linac (ERL) ensemble allows us to sustain an MW-class beam power with almost one hundred kW active power dissipation/consumption.

Published
2019
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3. Accurate Measurement of Optical Resonator Finesse

Author

Edoardo Vicentini, Francesco Canella, Simone Cialdi, Dario Giannotti, Gianluca Galzerano, and Edoardo Suerra

Subjects
Physics, business.industry, 020208 electrical & electronic engineering, Physics::Optics, 02 engineering and technology, Laser, law.invention, Amplitude modulation, Resonator, Finesse, Optics, Transmission (telecommunications), law, Optical cavity, 0202 electrical engineering, electronic engineering, information engineering, Physics::Accelerator Physics, Electrical and Electronic Engineering, business, Instrumentation, Frequency modulation, Beam (structure)
Abstract

We report on a novel and general measurement technique to characterize the finesse of optical resonators. The method retrieves the cavity transmission profile coefficient by using an amplitude modulation of the probe beam and a synchronous detection scheme. Both the real and imaginary parts of the transmission profile can be accurately measured. Validation of the method is performed using two different cavity configurations, a linear and a ring resonator, probed by both continuous-wave and mode-locked laser sources. A comparison with respect to conventional cavity-ring-down measurement scheme shows the accuracy of the proposed method.

Published
2020
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4. A new method for spatial mode shifting of stabilized optical cavities for the generation of dual-color X-rays

Author

S. Capra, Luca Serafini, Dario Giannotti, Gianluca Galzerano, Illya Drebot, Giovanni Mettivier, Edoardo Suerra, Francesco Canella, Daniele Cipriani, Simone Cialdi, P. Cardarelli, Suerra, E., Giannotti, D., Canella, F., Drebot, I., Capra, S., Cipriani, D., Mettivier, G., Galzerano, G., Cardarelli, P., Cialdi, S., and Serafini, L.

Subjects
Cavity mode shifting, Inverse Compton scattering, Enhancement cavity, X-rays, Nuclear and High Energy Physics, Laser, Physics::Optics, Curved mirror, Cavity mode shifting, Electron, law.invention, Scattering, Finesse, Superposition principle, Optics, law, X-rays, Instrumentation, Enhancement cavity, Physics, Focal point, business.industry, Compton scattering, Compton, Inverse Compton scattering, Cardinal point, Optical cavity, Physics::Accelerator Physics, business
Abstract

We propose an innovative method to shift the transversal position of the focal point of an optical cavity keeping it actively frequency stabilized. Our cavity is a 4 mirrors bow-tie cavity and the spatial shift of the resonant mode is obtained by properly rotating the two curved mirrors by piezo actuators. This method allows us to move the transversal position of the cavity focal point of 135 µm in a time of 50 ms, keeping the resonance condition of the cavity by means of the Pound–Drever–Hall technique. We propose to use this technique for the generation of 2-color X-rays via Inverse Compton Scattering (ICS). This technique exploits the large average power stored in the high finesse cavity by shifting the laser beam with respect to the electron beam trajectory, hence controlling the spatial superposition of the electron and photon beams in the interaction region. Arranging two cavities assembled one on top of the other, with different collision angle with the electron beam, allows the generation of X-ray bursts of different energies just by swiftly moving the two cavities, switching the two focal points onto the electron beam trajectory, thus activating in sequence two different ICS spectral lines .

Published
2021
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5. BriXS, a new X-ray inverse Compton source for medical applications

Author

Luca Serafini, Giovanni Mettivier, Angelo Taibi, Edoardo Suerra, Alberto Bacci, Simone Cialdi, P. Cardarelli, Gianfranco Paternò, M. Rossetti Conti, Dario Giannotti, Antonio Sarno, Francesco Canella, A. Loria, R. Castriconi, Paolo Russo, A. Del Vecchio, Riccardo Calandrino, Vittoria Petrillo, F. di Franco, Mauro Gambaccini, Illya Drebot, Cardarelli, P., Bacci, A., Calandrino, R., Canella, F., Castriconi, R., Cialdi, S., Del Vecchio, A., di Franco, F., Drebot, I., Gambaccini, M., Giannotti, D., Loria, A., Mettivier, G., Paterno, G., Petrillo, V., Rossetti Conti, M., Russo, P., Sarno, A., Suerra, E., Taibi, A., and Serafini, L.

Subjects
Photon, Astrophysics::High Energy Astrophysical Phenomena, Biophysics, General Physics and Astronomy, Inverse, Socio-culturale, Electrons, Electron, Photon energy, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Optics, Radiology, Nuclear Medicine and imaging, Inverse Compton, Monochromatic X-ray, X-ray imaging, Physics, Photons, business.industry, Lasers, X-Rays, X-ray imaging, X-ray, Free-electron laser, General Medicine, Inverse Compton, Radiography, Transverse plane, 030220 oncology & carcinogenesis, Monochromatic X-ray, business, Coherence (physics)
Abstract

MariX is a research infrastructure conceived for multi-disciplinary studies, based on a cutting-edge system of combined electron accelerators at the forefront of the world-wide scenario of X-ray sources. The generation of X-rays over a large photon energy range will be enabled by two unique X-ray sources: a Free Electron Laser and an inverse Compton source, called BriXS (Bright compact X-ray Source). The X-ray beam provided by BriXS is expected to have an average energy tunable in the range 20–180 keV and intensities between 1011 and 1013 photon/s within a relative bandwidth Δ E / E = 1 –10 % . These characteristics, together with a very small source size ( ~ 20 μ m) and a good transverse coherence, will enable a wide range of applications in the bio-medical field. An additional unique feature of BriXS will be the possibility to make a quick switch of the X-ray energy between two values for dual-energy and K-edge subtraction imaging. In this paper, the expected characteristics of BriXS will be presented, with a particular focus on the features of interest to its possible medical applications.

Published
2020

6. MariX, an advanced MHz-class repetition rate X-ray source for linear regime time-resolved spectroscopy and photon scattering

Author

Z. Mazzotta, Riccardo Valdagni, M. Moretti Sala, Silvia Morante, Lucio Rossi, Massimo Sorbi, M. Opromolla, Adolfo Esposito, F. Camera, Giorgio Turchetti, Alberto Pullia, Massimo Petrarca, Francesco Ragusa, S. Capra, Andrea Castoldi, Massimiliano Romé, Dario Giannotti, Francesco Stellato, Marcel Ruijter, Luca Serafini, Antonio Sarno, A. Bellandi, Mauro Carrara, A. Loria, Riccardo Calandrino, S. Samsam, Paola Mangili, Chiara Guazzoni, Daniele Sertore, L. Monaco, Verardo Torri, Alberto Bacci, Cristina Vaccarezza, Giacomo Claudio Ghiringhelli, Vittoria Petrillo, Francesco Canella, A. Del Vecchio, M. Bertucci, Marco A. C. Potenza, Alberto Tagliaferri, Alessandro Cianchi, C. Paulin, Giorgio Rossi, Paolo Russo, Tommaso Mazza, Mauro Gambaccini, Ermanno Pinotti, Matteo G. A. Paris, Ezio Puppin, Paolo Laporta, Roberta Ramponi, Giovanni Mettivier, Gianluca Galzerano, Simone Cialdi, P. Cardarelli, Fabian Zomer, Edoardo Suerra, Stefano Olivares, Martino Bolognesi, Daniele Nutarelli, F. Prelz, Chiara Meroni, L. Faillace, F. Broggi, Alke Martens, Bruno Paroli, Nicola Coluccelli, Angelo Vanzulli, Illya Drebot, Gianfranco Paternò, M. Rossetti Conti, Angelo Taibi, M. Statera, Bruno Spataro, Dario Giove, C. Curatolo, Flavia Groppi, S. Leoni, Rocco Paparella, S. Di Mitri, Laura Perini, G.M. Cattaneo, Carlo Fiorini, Kevin Dupraz, Massimo Ferrario, Kevin Cassou, Carlo Pagani, Paolo Piseri, Giovanni Onida, Andrea Rossi, R. Castriconi, Paolo Michelato, Angelo Bosotti, 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-Saclay, Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS), Serafini, L., Bacci, A., Bellandi, A., Bertucci, M., Bolognesi, M., Bosotti, A., Broggi, F., Calandrino, R., Camera, F., Canella, F., Capra, S., Cardarelli, P., Carrara, M., Cassou, K., Castoldi, A., Castriconi, R., Cattaneo, G. M., Cialdi, S., Cianchi, A., Coluccelli, N., Curatolo, C., Del Vecchio, A., Di Mitri, S., Drebot, I., Dupraz, K., Esposito, A., Faillace, L., Ferrario, M., Fiorini, C., Galzerano, G., Gambaccini, M., Ghiringhelli, G., Giannotti, D., Giove, D., Groppi, F., Guazzoni, C., Laporta, P., Leoni, S., Loria, A., Mangili, P., Martens, A., Mazza, T., Mazzotta, Z., Meroni, C., Mettivier, Giovanni, Michelato, P., Monaco, L., Morante, S., Moretti Sala, M., Nutarelli, D., Olivares, S., Onida, G., Opromolla, M., Pagani, C., Paparella, R., Paris, M. G. A., Paroli, B., Paternò, G., Paulin, C., Perini, L., Petrarca, M., Petrillo, V., Pinotti, E., Piseri, P., Potenza, M. A. C., Prelz, F., Pullia, A., Puppin, E., Ragusa, F., Ramponi, R., Romè, M., Rossetti Conti, M., Rossi, A. R., Rossi, L., Ruijter, M., Russo, Paolo, Samsam, S., Sarno, Antonio, Sertore, D., Sorbi, M., Spataro, B., Statera, M., Stellato, F., Suerra, E., Tagliaferri, A., Taibi, A., Torri, V., Turchetti, G., Vaccarezza, C., Valdagni, R., Vanzulli, A., Zomer, F., Rossi, G., 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
Nuclear and High Energy Physics, Photon, Astrophysics::High Energy Astrophysical Phenomena, Linear accelerators Free-electron lasers, Linear accelerators, Free-electron lasers, Medicine applications, Socio-culturale, 02 engineering and technology, 01 natural sciences, 7. Clean energy, Instrumentation, law.invention, Optics, law, 0103 physical sciences, 010306 general physics, Spectroscopy, Physics, [PHYS]Physics [physics], Range (particle radiation), business.industry, Scattering, Particle accelerator, Photoelectric effect, 021001 nanoscience & nanotechnology, Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin), Pulse (physics), Time-resolved spectroscopy, 0210 nano-technology, business
Abstract

The need of a fs-scale pulsed, high repetition rate, X-ray source for time-resolved fine analysis of matter (spectroscopy and photon scattering) in the linear response regime is addressed by the conceptual design of a facility called MariX (Multi-disciplinary Advanced Research Infrastructure for the generation and application of X-rays) outperforming current X-ray sources for the declared scope. MariX is based on the original design of a two-pass two-way superconducting linear electron accelerator , equipped with an arc compressor, to be operated in CW mode (1 MHz). MariX provides FEL emission in the range 0.2–8 keV with 1 0 8 photons per pulse ideally suited for photoelectric effect and inelastic X-ray scattering experiments. The accelerator complex includes an early stage that supports an advanced inverse Compton source of very high-flux hard X-rays of energies up to 180 keV that is well adapted for large area radiological imaging, realizing a broad science programme and serving a multidisciplinary user community, covering fundamental science of matter and application to life sciences, including health at preclinical and clinical level.

Published
2019
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