Open AccessGenerating Single-Spike Hard X-Ray Pulses with Nonlinear Bunch Compression in Free-Electron Lasers
Author(s) -
Senlin Huang,
Yuantao Ding,
Y. Feng,
E. Hemsing,
Zhirong Huang,
J. Krzywiński,
Alberto Lutman,
Agostino Marinelli,
T. Maxwell,
Diling Zhu
Publication year - 2017
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.119.154801
Subject(s) - physics , linear particle accelerator , laser , electron , free electron model , pulse (music) , radiation , energy (signal processing) , optics , photon , photon energy , pulse duration , atomic physics , nuclear physics , detector , beam (structure) , quantum mechanics
A simple method for generating single-spike hard x-ray pulses in free-electron lasers (FELs) has been developed at the Linac Coherent Light Source (LCLS). This is realized by nonlinear bunch compression using 20-pC bunch charge, demonstrated in the hard x-ray regime at 5.6 and 9 keV, respectively. Measurements show about half of the FEL shots containing a single-spike spectrum. At 5.6-keV photon energy, the single-spike shots have a mean pulse energy of about 10 μJ with 70% intensity fluctuation and the pulse full width at half maximum is evaluated to be at 200-as level.
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