Beam performance of the SHINE dechirper  

作　　者：You-Wei Gong Meng Zhang Wei-Jie Fan Duan Gu Ming-Hua Zhao 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China

出　　处：《Nuclear Science and Techniques》2021年第3期72-81,共10页核技术（英文）

基　　金：supported by the Youth Innovation Promotion Association CAS(Nos.2018300 and 2021282);the National Key Research and Development Program of China(No.2018YFE0103100);the National Natural Science Foundation of China(No.11935020)。

摘　　要：A corrugated structure is built and tested on many FEL facilities,providing a'dechirper'mechanism for eliminating energy spread upstream of the undulator section of X-ray FELs.The wakefield effects are here studied for the beam dechirper at the Shanghai high repetition rate XFEL and extreme light facility(SHINE),and compared with analytical calculations.When properly optimized,the energy spread is well compensated.The transverse wakefield effects are also studied,including the dipole and quadrupole effects.By using two orthogonal dechirpers,we confirm the feasibility of restraining the emittance growth caused by the quadrupole wakefield.A more efficient method is thus proposed involving another pair of orthogonal dechirpers.

关 键 词：Corrugated structure Energy spread WAKEFIELD Shanghai high repetition rate XFEL and extreme light facility 

分 类 号：TL53[核科学技术—核技术及应用]