Single shot spatial and temporal coherence properties of the SLAC linac coherent light source in the hard x-ray regime

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.108.024801· OSTI ID:1033858

Gutt, C; Wochner, P; Fischer, B; Conrad, H; Castro-Colin, M; Lee, S; Lehmkuhler, F; Steinke, I; Sprung, M; Roseker, W; Zhu, D; Lemke, H; Bogle, S; Fuoss, P H; Stephenson, G B; Cammarata, M; Fritz, D M; Robert, A; Grubel, G ^[1]

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1. Materials Science Division

We measured the transverse and longitudinal coherence properties of the Linac Coherent Light Source (LCLS) at SLAC in the hard x-ray regime at 9 keV photon energy on a single shot basis. Speckle patterns recorded in the forward direction from colloidal nanoparticles yielded the transverse coherence properties of the focused LCLS beam. Speckle patterns from a gold nanopowder recorded with atomic resolution allowed us to measure the shot-to-shot variations of the spectral properties of the x-ray beam. The focused beam is in the transverse direction fully coherent with a mode number close to 1. The average number of longitudinal modes behind the Si(111) monochromator is about 14.5 and the average coherence time {tau}{sub c} = (2.0 {+-} 1.0) fs. The data suggest a mean x-ray pulse duration of (29 {+-} 14) fs behind the monochromator for (100 {+-} 14) fs long electron pulses.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 1033858
• Report Number(s): ANL/MSD/JA-71037; PRLTAO; TRN: US1200618
• Journal Information: Physical Review Letters, Vol. 108, Issue 2; ISSN 0031-9007
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
ELECTRONS
GOLD
LIGHT SOURCES
LINEAR ACCELERATORS
MONOCHROMATORS
PHOTONS
RESOLUTION
STANFORD LINEAR ACCELERATOR CENTER