| Paper |
Title |
Page |
| MOPC034 |
Collective Effects in a Short-Pulse FEL Driver
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145 |
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- P. H. Williams, H. L. Owen
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- G. Bassi
Cockcroft Institute, Warrington, Cheshire
- S. Thorin
MAX-lab, Lund
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There is much interest in the provision of coherent, tunable VUV and soft X-ray pulses of duration less than 10fs. A 1.3 GHz linac driver concept has been developed, and in this paper we address collective effects in the short electron bunches using start-to-end modelling. In particular, we examine the limitations from coherent radiation and induced microbunching, and their impact on the design of the accelerator system.
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| TUOBG04 |
A Vlasov-Maxwell Solver to Study Microbunching Instability in the FERMI@ELETTRA First Bunch Compressor System
|
971 |
| |
- G. Bassi
Liverpool University, Science Faculty, Liverpool
- G. Bassi
Cockcroft Institute, Warrington, Cheshire
- J. A. Ellison, K. A. Heinemann
UNM, Albuquerque, New Mexico
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Microbunching can cause an instability which degrades beam quality. This is a major concern for free electron lasers where very bright electron beams are required. A basic theoretical framework for understanding this instability is the 3D Vlasov-Maxwell system. However, the numerical integration of this system is computationally too intensive at the moment. As a result, investigations to date have been done using very simplified analytical models or numerical solvers based on simple 1D models. We have developed an accurate and reliable 2D Vlasov-Maxwell solver which we believe improves existing codes. Our solver has been successfully tested against the Zeuthen benchmark bunch compressors*. In the present contribution we apply our self-consistent, parallel solver to study the microbunching instability in the first bunch compressor system of FERMI@ELETTRA. This system was proposed as a benchmark for testing codes at the September'07 workshop on microbunching instability in Trieste**.
*PAC2007, papers TUZBC03 and THPAN084.
**https://www.elettra.trieste.it/FERMI/index.php?n=Main. MicrobProgram
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Slides
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| TUOBG04 |
A Vlasov-Maxwell Solver to Study Microbunching Instability in the FERMI@ELETTRA First Bunch Compressor System
|
971 |
| |
- G. Bassi
Liverpool University, Science Faculty, Liverpool
- G. Bassi
Cockcroft Institute, Warrington, Cheshire
- J. A. Ellison, K. A. Heinemann
UNM, Albuquerque, New Mexico
|
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| |
Microbunching can cause an instability which degrades beam quality. This is a major concern for free electron lasers where very bright electron beams are required. A basic theoretical framework for understanding this instability is the 3D Vlasov-Maxwell system. However, the numerical integration of this system is computationally too intensive at the moment. As a result, investigations to date have been done using very simplified analytical models or numerical solvers based on simple 1D models. We have developed an accurate and reliable 2D Vlasov-Maxwell solver which we believe improves existing codes. Our solver has been successfully tested against the Zeuthen benchmark bunch compressors*. In the present contribution we apply our self-consistent, parallel solver to study the microbunching instability in the first bunch compressor system of FERMI@ELETTRA. This system was proposed as a benchmark for testing codes at the September'07 workshop on microbunching instability in Trieste**.
*PAC2007, papers TUZBC03 and THPAN084.
**https://www.elettra.trieste.it/FERMI/index.php?n=Main. MicrobProgram
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Slides
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