Improving a high-efficiency, gated spectrometer for x-ray Thomson scattering experiments at the National Ignition Facility
- Lawrence Livermore National Laboratory, Livermore, California 94720 (United States)
- University of California, Berkeley, California 94720 (United States)
- Gesellschaft für Schwerionenphysik, Darmstadt (Germany)
- SLAC National Accelerator Laboratory, Menlo Park, California 94720 (United States)
We are developing x-ray Thomson scattering for applications in implosion experiments at the National Ignition Facility. In particular we have designed and fielded MACS, a high-efficiency, gated x-ray spectrometer at 7.5–10 keV [T. Döppner et al., Rev. Sci. Instrum. 85, 11D617 (2014)]. Here we report on two new Bragg crystals based on Highly Oriented Pyrolytic Graphite (HOPG), a flat crystal and a dual-section cylindrically curved crystal. We have performed in situ calibration measurements using a brass foil target, and we used the flat HOPG crystal to measure Mo K-shell emission at 18 keV in 2nd order diffraction. Such high photon energy line emission will be required to penetrate and probe ultra-high-density plasmas or plasmas of mid-Z elements.
- OSTI ID:
- 22596585
- Journal Information:
- Review of Scientific Instruments, Vol. 87, Issue 11; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
A platform for x-ray Thomson scattering measurements of radiation hydrodynamics experiments on the NIF
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journal | October 2018 |
X-ray penumbral imaging diagnostic developments at the National Ignition Facility
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conference | September 2017 |
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