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Start Over Descriptor "superconducting rf" Topic particle accelerators
7 results on '"superconducting rf"'

1. Feedforward resonance control for the European X-ray free electron laser high duty cycle upgrade

Author

Andrea Bellandi, Julien Branlard, Holger Schlarb, and Christian Schmidt

Subjects
particle accelerators, LLRF, superconducting RF, free electron laser, control systems, Physics, QC1-999
Abstract

The High Duty Cycle (HDC) upgrade is a proposed improvement to the existing European X-ray Free Electron Laser (EuXFEL) to extend the pulsed RF duty factor from the actual value of around 1% to more than 5% up to Continuous Wave (CW). To implement this upgrade, the loaded quality factor (QL) of the superconducting cavities will increase by more than one order of magnitude. This will result in shrinking the cavity bandwidth to values as low as a few Hertz. Since the Lorentz Force Detuning (LFD) experienced during the accelerating field buildup is of hundreds of Hertz, the Low-Level RF (LLRF) system has to accurately track and control the cavity resonance frequency to obtain the desired accelerating gradient. Moreover, ponderomotive instabilities have to be suppressed to achieve stability during beam acceleration. Since LFD is a repetitive disturbance in cavity frequency, the correction to its effects can be implemented as a feedforward compensation on the piezoelectric tuners of the cavity. Initial results on the simulation of feedforward resonance control in the HDC regime are discussed in this proceeding.

Published
2023
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2. HOM frequency control of SRF cavity in high current ERLs.

Author

Xu, Chen and Ben-Zvi, Ilan

Subjects
*SUPERCONDUCTING cavity resonators, *PARTICLE accelerators, *PARTICLE beams, *ELECTRIC power production, *RESONANCE frequency analysis
Abstract

The acceleration of high-current beam in Superconducting Radio Frequency (SRF) cavities is a challenging but essential for a variety of advanced accelerators. SRF cavities should be carefully designed to minimize the High Order Modes (HOM) power generated in the cavities by the beam current. The reduction of HOM power we demonstrate in a particular case can be quite large. This paper presents a method to systematically control the HOM resonance frequencies in the initial design phase to minimize the HOM power generation. This method is expected to be beneficial for the design of high SRF cavities addressing a variety of Energy Recovery Linac (ERL) applications. [ABSTRACT FROM AUTHOR]

Published
2018
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3. Systematic uncertainties in RF-based measurement of superconducting cavity quality factors.

Author

Holzbauer, J.P., Pischalnikov, Yu., Sergatskov, D.A., Schappert, W., and Smith, S.

Subjects
*SUPERCONDUCTORS, *QUALITY factor, *UNCERTAINTY, *PARTICLE accelerators, *NUCLEAR research
Abstract

Q 0 determinations based on RF power measurements are subject to at least three potentially large systematic effects that have not been previously appreciated. Instrumental factors that can systematically bias RF based measurements of Q 0 are quantified and steps that can be taken to improve the determination of Q 0 are discussed. [ABSTRACT FROM AUTHOR]

Published
2016
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4. Overview of ILC.

Author

Pagani, Carlo

Subjects
*LINEAR accelerators, *COLLIDERS (Nuclear physics), *PARTICLE accelerators, *PHYSICAL sciences, *PHYSICS education
Abstract

I will review the history of the linear colliders since the original Tigner proposal of 1965, passing through the great success of the TESLA Collaboration and TTF, up to the current Global Design Effort, aiming at its realization. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2007
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5. The SPL at CERN.

Author

Garoby, R.

Subjects
*LINEAR accelerators, *PROTON accelerators, *PARTICLE accelerators, *NEUTRINOS, *MUONS, *LEPTONS (Nuclear physics)
Abstract

The Superconducting Proton Linac (SPL) is a multi-GeV, multi-MW linear proton machine which represents a very interesting option for the future of CERN. Operating at 50 Hz, it will serve both as a high performance injector for the complex of high energy accelerators, replacing the present PS booster, and as a high power proton driver for other physics applications like the generation of muons and neutrinos and/or radio-active ions. The potential of the SPL is presently being scrutinized and compared to other alternatives. A path of evolution is considered, beginning with the realization of a 3 MeV test facility, followed by the building of the 160 MeV front end of the SPL and finishing with the construction of the complete linac. The status of these investigations and the progress towards the SPL are summarized in this paper. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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6. EuCARD 2010 Accelerator Technology in Europe

Author

Romaniuk, Ryszard S

Subjects
Engineering, Nuclear transmutation, 020209 energy, Superconducting RF, 02 engineering and technology, 7. Clean energy, 050601 international relations, law.invention, law, 0202 electrical engineering, electronic engineering, information engineering, media_common.cataloged_instance, Seven Basic Tools of Quality, European union, Particle beam, media_common, business.industry, 05 social sciences, Electrical engineering, Radioactive waste, Particle accelerator, Nuclear power, particle accelerators, 0506 political science, Systems engineering, European Research Area, business
Abstract

Accelerators are basic tools of the experimental physics of elementary particles, nuclear physics, light sources of the fourth generation. They are also used in myriad other applica- tions in research, industry and medicine. For example, there are intensely developed transmutation techniques for nuclear waste from nuclear power and atomic industries. The European Union invests in the development of accelerator infrastructures inside the framework programs to build the European Research Area. The aim is to build new infrastructure, develop the existing, and generally make the infrastructure available to competent users. The paper summarizes the first year of activities of the EU FP7 Project Capacities EuCARD - European Coordination of Accelerator R&D. Several teams from this country participate actively in this project. The contribution from Polish research teams concerns: photonic and electronic measurement - control systems, RF-gun co-design, thin-film superconducting technology, superconducting transport infrastructures, photon and particle beam measurements and control. Keywords—RF, SRF, superconducting RF, electronic systems, particle accelerators, FEL lasers, photon physics, photonics, elementary particles, large research infrastructures in Europe, European research projects.

Published
2010
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7. Accelerator science and technology in Europe - EuCARD 2012

Author

Ryszard Romaniuk and Warsaw University of Technology, Institute of Electronic Systems

Subjects
Engineering, business.industry, Free-electron laser, Particle accelerator, high energy physics experiments, integration of hardware and software, free electron laser, particle accelerators, nuclear electronics, Domain (software engineering), Metrology, law.invention, superconducting RF, Data acquisition, law, Nuclear electronics, Systems engineering, Electronics and photonics for high energy physics experiments, Telecommunications, business, Science, technology and society, Electronic systems, advanced electronic systems
Abstract

Accelerator science and technology is one of a key enablers of the developments in the particle physic, photon physics and also applications in medicine and industry. The paper presents a digest of the research results in the domain of accelerator science and technology in Europe, shown during the third annual meeting of the EuCARD – European Coordination of Accelerator Research and Development. The conference concerns building of the research infrastructure, including in this advanced photonic and electronic systems for servicing large high energy physics experiments. There are debated a few basic groups of such systems like: measurement – control networks of large geometrical extent, multichannel systems for large amounts of metrological data acquisition, precision photonic networks of reference time, frequency and phase distribution.

Published
2012

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