Journal Article

Hard X-ray free-electron laser with femtosecond-scale timing jitter

Kim, Changbum, Jung, Young Gyu, Park, Yong Jung, Hu, Jinyul, Kang, Tai-Hee, Hwang, Sun-min, Shin, Hocheol, Park, Ki-Hyeon, Park, Byoung Ryul, Park, Jaehun, Yang, Jung-Moo, Lee, Heung-Soo, Kim, Seung Nam, Park, Jaehyun, Kim, Seung-Hwan, Lee, Sojeong, Parc, Yong Woon, Kwon, Soonam, Koo, Tae-Yeong, Sung, Chi-Won, Kim, Sang-Hee, Kim, Ji Hwa, Park, Soung Soo, Lim, Chae-yong, Lee, Jae Hyuk, Hyun, Hyojung, Mok, Ik-Su, Kim, Kwang-Woo, Kim, Sangsoo, Kim, Sunam, Na, Donghyun, Park, Sung-Ju, Eom, Intae, Jeong, Seong Hun, Nam, Ki Hyun, Heo, Hoon, Park, Jaeku, Yu, Chung-Jong, Kim, Bong-Soo, Ko, In Soo, Min, Chang-Ki, Kim, Seonghan, Kang, Heung-Sik, Baek, Soung Youl, Lee, Bong-Ho, Oh, Bonggi, Choi, Hyo-Jin, Mun, Geonyeong, Yang, Haeryong, Kim, Young-Chan, Kim, Jangwoo, Kim, KwangHoon, Lee, Hong Gi, Suh, Young Jin, Kim, Min Ho, Lee, Chae-Soon, Kim, Gyujin, Lee, Mong-Soo, Nam, Inhyuk, Han, Jang-Hui, Park, Sang-Youn, Shin, Dong Cheol, Jung, Nam-Suk, Kim, Kyung Sook, Lee, Hee-Seock, Hong, Juho, Kim, Yongsam, Lee, Woul-Woo, Kim, Myong Jin, Park, Sang Han, Kim, Dong-Eon, Suh, Hyung Suck, Rah, Seungyu, Jung, Seonghoon, Lee, Sangbong

2017

Overview

The hard X-ray free-electron laser at the Pohang Accelerator Laboratory (PAL-XFEL) in the Republic of Korea achieved saturation of a 0.144 nm free-electron laser beam on 27 November 2016, making it the third hard X-ray free-electron laser in the world, following the demonstrations of the Linac Coherent Light Source (LCLS) and the SPring-8 Angstrom Compact Free Electron Laser (SACLA). The use of electron-beam-based alignment incorporating undulator radiation spectrum analysis has allowed reliable operation of PAL-XFEL with unprecedented temporal stability and dispersion-free orbits. In particular, a timing jitter of just 20 fs for the free-electron laser photon beam is consistently achieved due to the use of a state-of-the-art design of the electron linear accelerator and electron-beam-based alignment. The low timing jitter of the electron beam makes it possible to observe Bi(111) phonon dynamics without the need for timing-jitter correction, indicating that PAL-XFEL will be an extremely useful tool for hard X-ray time-resolved experiments. The Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL) in South Korea has now entered operation with a timing jitter of just 20 fs.

• Publisher: Nature Publishing Group UK,Nature Publishing Group
• Subject: 639/624/1020/1087 / 639/624/1020/1095 / Acceleration / Alignment / Applied and Technical Physics / Coherent light / Electron beams / Free electron lasers / Laboratories / Laser beams / Lasers / Light sources / Orbital stability / Photon beams / Physics / Physics and Astronomy / Quantum Physics / Spectrum analysis / Stability analysis / State of the art / Superconducting supercolliders / Timing jitter / Vibration / X ray spectra