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Title: Dispersion Caused by the Penetration Effect in X-ray Compressors

Journal Article · · Photonics
ORCiD logo [1];  [2]; ORCiD logo [3];  [3];  [3];  [3];  [4];  [5]
  1. Institute of Advanced Science Facilities, Shenzhen (China); Southern University of Science and Technology (SUSTech), Shenzhen (China)
  2. Institute of Advanced Science Facilities, Shenzhen (China); Univ. of Science and Technology of China, Hefei (China). National Synchrotron Radiation Laboratory (NSRL)
  3. Institute of Advanced Science Facilities, Shenzhen (China)
  4. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
  5. Institute of Advanced Science Facilities, Shenzhen (China); Chinese Academy of Sciences (CAS), Dalian (China). Dalian Institute of Chemical Physics

Chirped X-ray pulse compression is a promising approach for generating ultra-short X-ray free electron laser (XFEL) pulses. The design of X-ray pulse compressors requires the careful control of group delay dispersion (GDD), which plays a critical role in achieving optimal compression. However, the penetration dispersion of crystals and multilayers can induce an extra GDD, which may result in over-compression or under-compression. In this study, we investigate the penetration dispersion of crystals and multilayers theoretically and numerically. Our results indicate that the extra GDD induced by the penetration effect increases as the bandwidth of the rocking curve decreases. Moreover, the extra GDD is nonlinear and can be mitigated by optimizing the configuration of X-ray pulse compressors. This work provides insights into the dispersion compensation and configuration optimization of X-ray pulse compressors, which are essential for generating ultra-short XFEL pulses.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China; Chinese Academy of Sciences (CAS)
Grant/Contract Number:
AC02-76SF00515; 12005135; 22288201; 2018YFE0203000; GJJSTD20190002
OSTI ID:
1996630
Journal Information:
Photonics, Vol. 10, Issue 5; ISSN 2304-6732
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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