Microbunch Instability in Wigglers

YANG Yu-Feng; ZHU Xiong-Wei

Chinese Physics C> 2007, Vol. 31> Issue(8) : 778-782

Microbunch Instability in Wigglers

YANG Yu-Feng ^, ,
ZHU Xiong-Wei

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

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Abstract：
We studied the microbunch instability in wigglers induced by coherent synchrotron radiation (CSR) theoretically and numerically for the first time. This instability occurs only at very small energy spread, and reaches maximum when the energy of electrons and the peak value of the magnet field adopt specific values. Results show that the instability may slightly exist in the wiggler of Beijing Free Electron Laser (BFEL), but does not happen at all in the wigglers of the proposed China Test Facility (CTF) for the X-ray free electron laser.

References

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. The LCSL Design Study Group. SLAC Report No. SLAC-R-521, 19982. Saldin E L, Schneidmiller E A, Yurkov M V. DESY ReportNo. TELSA-FEL-2002-02, 20023. Heifets S, Stupakov G. Phys. Rev. ST Accel. Beams, 2002,5: 0644014. Heifets S, Stupakov G. SLAC Report No SLUC-PUB-8988,20015. Heifets S, Stupakov G. SLAC Report No SLUC-PUB-8761,20016. Murphy J B, Krinsky S, Gluckstern R L. Part. Accel., 1997,57: 97. LI Wen. Handbook of Mathematical Basic Formulas. Ha-erbin: Heilongjiang Scienti c and Technique Publishers,1984. 180(in Chinese)(李文.数学基本公式手册.哈尔滨:黑龙江科学技术出版社，1984. 180) 8. HUI Zhong-Xi, YANG Zhen-Hua. Free Electron Laser. Bei-jing: Defense Industrial Publishers, 1995. 22(in Chinese)(惠钟锡，杨震华.自由电子激光.北京:国防工业出版社，1995.

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YANG Yu-Feng and ZHU Xiong-Wei. Microbunch Instability in Wigglers[J]. Chinese Physics C, 2007, 31(8): 778-782.

YANG Yu-Feng and ZHU Xiong-Wei. Microbunch Instability in Wigglers[J]. Chinese Physics C, 2007, 31(8): 778-782. shu

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Received: 2006-11-21
Revised: 2006-12-28

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沈阳化工大学材料科学与工程学院沈阳 110142

Microbunch Instability in Wigglers

YANG Yu-Feng ^,
ZHU Xiong-Wei

Corresponding author: YANG Yu-Feng,

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2006-11-21
Accepted Date: 2006-12-28
Available Online: 2007-08-05

Abstract: We studied the microbunch instability in wigglers induced by coherent synchrotron radiation (CSR) theoretically and numerically for the first time. This instability occurs only at very small energy spread, and reaches maximum when the energy of electrons and the peak value of the magnet field adopt specific values. Results show that the instability may slightly exist in the wiggler of Beijing Free Electron Laser (BFEL), but does not happen at all in the wigglers of the proposed China Test Facility (CTF) for the X-ray free electron laser.