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Title: Bright x-ray stainless steel K-shell source development at the National Ignition Facility

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4922751· OSTI ID:1234624

High x-ray conversion efficiency (XRCE) K-shell sources are being developed for high energy density experiments for use as backlighters and for the testing of materials exposed to high x-ray fluxes and fluences. Recently, sources with high XRCE in the K-shell x-ray energy range of iron and nickel were investigated at the National Ignition Facility (NIF). The x-ray conversion efficiency in the 5–9 keV spectral range was determined to be 6.8% ± 0.3%. These targets were 4.1 mm diameter, 4 mm tall hollow epoxy tubes having a 50 μm thick wall supporting a tube of 3 to 3.5 μm thick stainless steel. The NIF laser deposited ~460 kJ of 3ω light into the target in a 140 TW, 3.3 ns square pulse. The absolute x-ray emission of the source was measured by two calibrated Dante x-ray spectrometers. In conclusion, time resolved images filtered for the Fe K-shell were recorded to follow the heating of the target. Time integrated high-resolution spectra were recorded in the K-shell range

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1234624
Alternate ID(s):
OSTI ID: 1228644
Report Number(s):
LLNL-JRNL-667562
Journal Information:
Physics of Plasmas, Vol. 22, Issue 6; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (3)

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Investigation of high X-ray conversion efficiency Kr filled gas sources at the National Ignition Facility journal June 2019
Dynamic high energy density plasma environments at the National Ignition Facility for nuclear science research journal February 2018