FEL performance achieved at PAL‐XFEL using a three‐chicane bunch compression scheme. (20th June 2019)

• Record Type: Journal Article
• Authors: Kang, Heung-Sik; Yang, Haeryong; Kim, Gyujin; Heo, Hoon; Nam, Inhyuk; Min, Chang-Ki; Kim, Changbum; Baek, Soung Youl; Choi, Hyo-Jin; Mun, Geonyeong; Park, Byoung Ryul; Suh, Young Jin; Shin, Dong Cheol; Hu, Jinyul; Hong, Juho; Jung, Seonghoon; Kim, Sang-Hee; Kim, KwangHoon; Na, Donghyun; Park, Soung Soo; Park, Yong Jung; Han, Jang-Hui; Jung, Young Gyu; Jeong, Seong Hun; Kim, Min Jae; Lee, Hong Gi; Lee, Sangbong; Lee, Woul-Woo; Oh, Bonggi; Suh, Hyung Suck; Park, Ki-Hyeon; Lee, Heung-Soo; Khan, D. Z.; Raubenheimer, T. O.; Wu, Juhao;
• Is Part Of: Journal of synchrotron radiation. Volume 26:Part 4(2019)
• Page Start: 1127
• Page End: 1138
• Publication Date: 2019-06-20
• Subjects: free‐electron laser -- hard X‐rays -- bunch compression -- coherent synchrotron radiation -- stability -- arrival timing jitter; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577519005861
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : PAL‐XFEL facilitating the 3‐BC scheme has achieved reliable XFEL operation with unprecedented stability. Its outperformance over the 2‐BC scheme is discussed. Abstract : PAL‐XFEL utilizes a three‐chicane bunch compression (3‐BC) scheme (the very first of its kind in operation) for free‐electron laser (FEL) operation. The addition of a third bunch compressor allows for more effective mitigation of coherent synchrotron radiation during bunch compression and an increased flexibility of system configuration. Start‐to‐end simulations of the effects of radiofrequency jitter on the electron beam performance show that using the 3‐BC scheme leads to better performance compared with the two‐chicane bunch compression scheme. Together with the high performance of the linac radiofrequency system, it enables reliable operation of PAL‐XFEL with unprecedented stability in terms of arrival timing, pointing and intensity; an arrival timing jitter of better than 15 fs, a transverse position jitter of smaller than 10% of the photon beam size, and an FEL intensity jitter of smaller than 5% are consistently achieved.