Open AccessHigh wavevector temporal speckle correlations at the Linac Coherent Light Source
Author(s) -
Sooheyong Lee,
Wojciech Roseker,
Christian Gutt,
Zhirong Huang,
Yuantao Ding,
G. Grübel,
A. Robert
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.009790
Subject(s) - optics , speckle pattern , monochromator , physics , linear particle accelerator , laser , scattering , thomson scattering , pulse shaping , pulse (music) , beam (structure) , detector , wavelength
We report on the feasibility of high wavevector temporal speckle correlation measurements at the world's first hard x-ray free electron laser, the Linac Coherent Light Source (LCLS). Due to the chaotic nature of LCLS, the spectral profile of the x-ray radiation fluctuates on a pulse-to-pulse basis. Its impact on the determination of the single shot speckle contrast in a wide angle x-ray scattering geometry is investigated by analyzing FEL power spectra that are simulated based on the nominal operational parameters of LCLS. Ultimately, a potential scheme to deliver a single-mode hard x-ray pulse is proposed by using a narrow bandpass crystal monochromator.