A Compact Hard X-Ray Free-Electron Laser based on Velocity Bunching
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- Title
- A Compact Hard X-Ray Free-Electron Laser based on Velocity Bunching
- Authors
- Lee, J; Oh, BH; Yoon, M
- Date Issued
- 2013-10
- Publisher
- KPS
- Abstract
- We show that a femto-second hard X-ray radiation pulse can be generated in a free-electron laser amplifier without magnetic bunch compressors. This is possible by adopting a very low charge electron beam followed by the velocity bunching (VB) in two accelerating sections in a linear accelerator. With VB, an electron bunch with a bunch charge of 10 pC can be successfully compressed in the presence of the space-charge effect by a factor of 150, from 0.2 ps to 1.3 fs rms. Multi-gigawatt hard X-ray radiation can be generated from a 5-GeV electron beam, saturating in approximately a 40-m distance from the undulator entrance. Various accelerator and electron-beam parameters were optimized using a multi-objective genetic algorithm.
- Keywords
- Undulator; XFEL; Velocity bunching; Bunch compression; SIMULATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14968
- DOI
- 10.3938/JKPS.63.1262
- ISSN
- 0374-4884
- Article Type
- Article
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 63, no. 7, page. 1262 - 1267, 2013-10
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