Capsule implosions for continuum x-ray backlighting of opacity samples at the National Ignition Facility

Opachich, Y. P.; Heeter, R. F.; Barrios, M. A.; Garcia, E. M.; Craxton, R. S.; King, J. A.; Liedahl, D. A.; McKenty, P. W.; Schneider, M. B.; May, M. J.; Zhang, R.; Ross, P. W.; Kline, J. L.; Moore, A. S.; Weaver, J. L.; Flippo, K. A.; Perry, T. S.

doi:10.1063/1.4985076

Capsule implosions for continuum x-ray backlighting of opacity samples at the National Ignition Facility

Journal Article · Thu Jun 08 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4985076· OSTI ID:1438698

^[1]; ^[2]; ^[2]; Garcia, E. M. ^[3]; ^[3]; King, J. A. ^[1]; Liedahl, D. A. ^[2]; McKenty, P. W. ^[3]; ^[2]; May, M. J. ^[2]; Zhang, R. ^[3]; Ross, P. W. ^[1]; Kline, J. L. ^[4]; Moore, A. S. ^[2]; ^[5]; ^[4]; ^[4]

National Security Technologies, LLC, Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Rochester, Rochester, NY (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Naval Research Lab., Washington, D.C. (United States)

Direct drive implosions of plastic capsules have been performed at the National Ignition Facility to provide a broad-spectrum (500–2000 eV) X-ray continuum source for X-ray transmission spectroscopy. The source was developed for the high-temperature plasma opacity experimental platform. Initial experiments using 2.0 mm diameter polyalpha-methyl styrene capsules with ~20 μm thickness have been performed. X-ray yields of up to ~1 kJ/sr have been measured using the Dante multichannel diode array. The backlighter source size was measured to be ~100 μm FWHM, with ~350 ps pulse duration during the peak emission stage. Lastly, these results are used to simulate transmission spectra for a hypothetical iron opacity sample at 150 eV, enabling the derivation of photometrics requirements for future opacity experiments.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1438698

Report Number(s):: LLNL-JRNL--740876

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 24; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (4)

Development and modeling of a polar-direct-drive exploding pusher platform at the National Ignition Facility Ellison, C. Leland; Whitley, Heather D.; Brown, Colin R. D. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5025724	journal	July 2018
Hohlraum modeling for opacity experiments on the National Ignition Facility Dodd, E. S.; DeVolder, B. G.; Martin, M. E. Physics of Plasmas, Vol. 25, Issue 6 https://doi.org/10.1063/1.5026285	journal	June 2018
Implementation of a 1-2 keV point-projection x-ray spectrometer on the National Ignition Facility King, J. A.; Opachich, Y. P.; Huffman, E. J. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038092	journal	October 2018
Iron X-ray Transmission at Temperature Near 150 eV Using the National Ignition Facility: First Measurements and Paths to Uncertainty Reduction Heeter, Robert; Perry, Ted; Johns, Heather Atoms, Vol. 6, Issue 4 https://doi.org/10.3390/atoms6040057	journal	October 2018

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