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Title: The seed energy fluctuation of hard X-ray self-seeding free electron laser

Journal Article · · AIP Advances
DOI:https://doi.org/10.1063/1.5091018· OSTI ID:1527352
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9]; ORCiD logo [5]
  1. Univ. of Science and Technology of China, Hefei (China); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States); Chinese Academy of Sciences (CAS), Shanghai (China)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States); Huazhong University of Science and Technology, Wuhan (China)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  6. Seabreeze High School, Daytona Beach, FL (United States)
  7. Saratoga High School, Saratoga, CA (United States)
  8. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Applied Physics; Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Advanced Research Inst.
  9. Univ. of Science and Technology of China, Hefei (China)
+ Show Author Affiliations

Self-seeding free electron lasers (FELs) are capable of generating fully coherent X-ray pulses. Yet, the stability of output pulse energy of hard X-ray self-seeding (HXRSS) FEL is poor. This letter reports the seed energy stability investigation of HXRSS FEL. For the purpose of a more stable HXRSS FEL, this work suggests a relatively broad bandwidth ρt of crystal monochromator, a relatively long electron bunch with energy jitter (r.m.s.) down to a quarter of FEL Pierce parameter ρ, and a larger Bragg angle θB to improve the seed energy stability. Moreover, the angle jitter (r.m.s.) between the SASE pulse incident direction and the crystal surface should be less than (ρ tan θB)/2, and the relative time jitter (r.m.s.) between the electron bunch and the seed should be less than half of the seed bump duration τt.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515; FWP-2013-SLAC-100164
OSTI ID:
1527352
Alternate ID(s):
OSTI ID: 1503923
Journal Information:
AIP Advances, Vol. 9, Issue 3; ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (18)

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Operation of a free-electron laser from the extreme ultraviolet to the water window journal June 2007
Collective instabilities and high-gain regime in a free electron laser journal July 1984
A novel self-seeding scheme for hard X-ray FELs journal September 2011
Gain-guided X-ray free-electron laser oscillator journal August 2018
A compact X-ray free-electron laser emitting in the sub-ångström region journal June 2012
First lasing and operation of an ångstrom-wavelength free-electron laser journal August 2010
Time dependence of Bragg forward scattering and self-seeding of hard x-ray free-electron lasers journal May 2012
An X-ray Free-Electron Laser Oscillator for Record High Spectral Purity, Brightness, and Stability journal January 2012
Review of fully coherent free-electron lasers journal September 2018
High brightness fully coherent x-ray amplifier seeded by a free-electron laser oscillator journal April 2018
X-ray FEL with a meV bandwidth
  • Saldin, E. L.
  • 19th Advanced ICFA beam dynamics workshop on physics of, and science with, the x-ray free-electron laser, AIP Conference Proceedings https://doi.org/10.1063/1.1401570
conference January 2001
Demonstration of self-seeding in a hard-X-ray free-electron laser journal August 2012
Analytical theory of intensity fluctuations in SASE journal April 1998
Possible application of X-ray optical elements for reducing the spectral bandwidth of an X-ray SASE FEL text January 1996
Time dependence of Bragg forward scattering and self-seeding of hard x-ray free-electron lasers text January 2012
Spatiotemporal Response of Crystals in X-ray Bragg Diffraction text January 2012
High brightness fully coherent X-ray amplifier seeded by a free-electron laser oscillator text January 2017

Figures / Tables (4)

FIG. 1(p. 2)figure FIG. 1
TABLE I(p. 2)table TABLE I
FIG. 2(p. 3)figure FIG. 2
FIG. 3(p. 3)figure FIG. 3

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