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

Journal Article · Mon Jun 15 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4922751· OSTI ID:22489996

May, M. J.; Fournier, K. B.; Colvin, J. D.; Barrios, M. A.; Dewald, E. L.; Moody, J.; Patterson, J. R.; Schneider, M.; Widmann, K. ^[1]; Hohenberger, M.; Regan, S. P. ^[2]

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1. Lawrence Livermore National Laboratory, P.O. Box 808 L170, Livermore, California 94551 (United States)
2. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)

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. 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.

• OSTI ID: 22489996
• Journal Information: Physics of Plasmas, Vol. 22, Issue 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CONVERSION
ENERGY DENSITY
EPOXIDES
IRON
K SHELL
KEV RANGE
LASERS
MATERIALS TESTING
NICKEL
SPECTRA
STAINLESS STEELS
TIME RESOLUTION
US NATIONAL IGNITION FACILITY
VISIBLE RADIATION
X RADIATION
X-RAY SPECTROMETERS