Journal
OPTICS EXPRESS
Volume 24, Issue 20, Pages 22469-22480Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.022469
Keywords
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Categories
Funding
- Human Frontiers Science Project [RGP0063/2013]
- National Institute of Health (NIH) [GM116423, GM110501, GM55302, P41GM103393]
- Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (OBES) [DE-AC02-05CH11231, DE-AC02-76SF00515]
- Federal Ministry of Education and Research (BMBF) [05K12CB4]
- European Community [PCIG10-GA-2011-297905]
- Helmholtz Virtual Institute Dynamic Pathways in Multidimensional Landscapes
- LCLS
- Stanford University through the Stanford Institute for Materials Energy Sciences (SIMES)
- Lawrence Berkeley National Laboratory (LBNL)
- University of Hamburg through the BMBF [FSP 301]
- Center for Free Electron Laser Science (CFEL)
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
- DOE Office of Biological and Environmental Research
- National Institutes of Health, National Institute of General Medical Sciences [P41GM103393]
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X-ray free electron lasers (XFELs) enable unprecedented new ways to study the electronic structure and dynamics of transition metal systems. L-edge absorption spectroscopy is a powerful technique for such studies and the feasibility of this method at XFELs for solutions and solids has been demonstrated. However, the required x-ray bandwidth is an order of magnitude narrower than that of self-amplified spontaneous emission (SASE), and additional monochromatization is needed. Here we compare L-edge x-ray absorption spectroscopy (XAS) of a prototypical transition metal system based on monochromatizing the SASE radiation of the linac coherent light source (LCLS) with a new technique based on self-seeding of LCLS. We demonstrate how L-edge XAS can be performed using the self-seeding scheme without the need of an additional beam line monochromator. We show how the spectral shape and pulse energy depend on the undulator setup and how this affects the x-ray spectroscopy measurements. (C) 2016 Optical Society of America
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