한빛사논문
- 조회1,218
Inhyuk Nam 1,4, Chang-Ki Min1,4, Bonggi Oh 1,4, Gyujin Kim1, Donghyun Na1, Young Jin Suh1, Haeryong Yang1, Myung Hoon Cho1, Changbum Kim1, Min-Jae Kim1, Chi Hyun Shim1, Jun Ho Ko1, Hoon Heo1, Jaehyun Park1, Jangwoo Kim 1, Sehan Park1, Gisu Park1, Seonghan Kim1, Sae Hwan Chun1, HyoJung Hyun1, Jae Hyuk Lee1, Kyung Sook Kim1, Intae Eom1, Seungyu Rah1, Deming Shu2, Kwang-Je Kim2, Sergey Terentyev3, Vladimir Blank3, Yuri Shvyd’ko 2,*, Sang Jae Lee 1,* and Heung-Sik Kang1,*
1Pohang Accelerator Laboratory, Pohang, Gyeongbuk, Republic of Korea. 2Argonne National Laboratory, Argonne, IL, USA. 3Technological Institute for Superhard and Novel Carbon Materials, Moscow, Russian Federation. 4These authors contributed equally: Inhyuk Nam, Chang-Ki Min, Bonggi Oh.
*Correspondence to Yuri Shvyd’ko or Sang Jae Lee or Heung-Sik Kang.
Abstract
A self-seeded X-ray free-electron laser (XFEL) is a promising approach to realize bright, fully coherent free-electron laser (FEL) sources in the hard X-ray domain that have been a long-standing issue with longitudinal coherence remaining challenging. At the Pohang Accelerator Laboratory XFEL, we have demonstrated a hard X-ray self-seeded XFEL with a peak brightness of 3.2 × 1035 photons s–1 mm–2 mrad–2 0.1% bandwidth (BW)–1 at 9.7 keV. The bandwidth (0.19 eV) is about 1/70 times as wide (close to the Fourier transform limit) and the peak spectral brightness is 40 times higher than in self-amplified spontaneous emission (SASE), with substantial improvements in the stability of self-seeding and noticeably suppressed pedestal effects. We could reach an excellent self-seeding performance at a photon energy of 3.5 keV (lowest) and 14.6 keV (highest) with the same stability as the 9.7 keV self-seeding. The bandwidth of the 14.6 keV seeded FEL was 0.32 eV, and the peak brightness was 1.3 × 1035 photons s–1 mm–1 mrad–1 0.1%BW–1. We show that the use of seeded FEL pulses with higher reproducibility and a cleaner spectrum results in serial femtosecond crystallography data of superior quality compared with data collected using SASE mode.
논문정보
- Research article
- 2021년 03월 (BRIC 등록일 2021-03-18)
- 국내(교신)+국외 연구진
- 생명과학 > 구조생물 및 생물물리학
댓글 작성 로그인
팝업 닫기관련 링크
연구자 키워드
관련분야 연구자보기
소속기관 논문보기
관련분야 논문보기
