Impact on the magnetic compressor due to CSR

LIU Chu-Yu; WANG Fang; WANG Er-Dong; QUAN Sheng-Wen; HAO Jian-Kui; LU Xiang-Yang; ZHANG Bao-Cheng; ZHAO Kui

doi:10.1088/1674-1137/32/8/016

Chinese Physics C> 2008, Vol. 32> Issue(8) : 665-667 DOI: 10.1088/1674-1137/32/8/016

Impact on the magnetic compressor due to CSR

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Abstract：
When an electron bunch is compressed in a chicane compressor, the CSR (coherent synchrotron radiation) will induce energy redistribution along the bunch. Such energy redistribution will affect the longitudinal emittance as a direct consequence. It will also excite betatron oscillation due to the chromatic transfer functions, and hence a transverse emittance change. So, it is indispensable for us to find a way to alleviate the CSR-caused emittance dilution and the bad result of chicane compressor in PKU-FEL.

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LIU Chu-Yu, WANG Fang, WANG Er-Dong, QUAN Sheng-Wen, HAO Jian-Kui, LU Xiang-Yang, ZHANG Bao-Cheng and ZHAO Kui. Impact on the magnetic compressor due to CSR[J]. Chinese Physics C, 2008, 32(8): 665-667. doi: 10.1088/1674-1137/32/8/016

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Received: 2007-09-26
Revised: 2008-01-08

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沈阳化工大学材料科学与工程学院沈阳 110142

Impact on the magnetic compressor due to CSR

Corresponding author: LIU Chu-Yu,

Received Date: 2007-09-26
Accepted Date: 2008-01-08
Available Online: 2008-08-05

Abstract:

When an electron bunch is compressed in a chicane compressor, the CSR (coherent synchrotron radiation) will induce energy redistribution along the bunch. Such energy redistribution will affect the longitudinal emittance as a direct consequence. It will also excite betatron oscillation due to the chromatic transfer functions, and hence a transverse emittance change. So, it is indispensable for us to find a way to alleviate the CSR-caused emittance dilution and the bad result of chicane compressor in PKU-FEL.