skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High-energy (> 70 KeV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility

Abstract

Here, the Advanced Radiographic Capability (ARC) laser system at the National Ignition Facility (NIF) is designed to ultimately provide eight beamlets with a pulse duration adjustable from 1 to 30 ps, and energies up to 1.5 kJ per beamlet. Currently, four beamlets have been commissioned. In the first set of 6 commissioning target experiments, the individual beamlets were fired onto gold foil targets with energy up to 1 kJ per beamlet at 20–30 ps pulse length. The x-ray energy distribution and pulse duration were measured, yielding energy conversion efficiencies of 4–9 × 10 –4 for x-rays with energies greater than 70 keV. With greater than 3 J of such x-rays, ARC provides a high-precision x-ray backlighting capability for upcoming inertial confinement fusion and high-energy-density physics experiments on NIF.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1] more »;  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1] « less
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1347667
Alternate Identifier(s):
OSTI ID: 1349380
Report Number(s):
LLNL-JRNL-706562
Journal ID: ISSN 1070-664X; TRN: US1700603
Grant/Contract Number:
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 3; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; 42 ENGINEERING

Citation Formats

Chen, Hui, Hermann, M. R., Kalantar, D. H., Martinez, D. A., Di Nicola, P., Tommasini, R., Alessi, D., Bowers, M., Browning, D., Brunton, G., Budge, T., Crane, J., Di Nicola, J. -M., Doppner, T., Dixit, S., Erbert, G., Fishler, B., Halpin, J., Hamamoto, M., Heebner, J., Hernandez, V. J., Hohenberger, M., Homoelle, D., Honig, J., Hsing, W., Izumi, N., Khan, S., LaFortune, K., Lawson, J., Nagel, S. R., Negres, R. A., Novikova, L., Orth, C., Pelz, L., Prantil, M., Rushford, M., Shaw, M., Sigurdsson, R., Wegner, P., Widmayer, C., Williams, G. J., Williams, W., Whitman, P., Yang, S., Landen, O. L., and Sherlock, M.. High-energy (> 70 KeV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility. United States: N. p., 2017. Web. doi:10.1063/1.4978493.
Chen, Hui, Hermann, M. R., Kalantar, D. H., Martinez, D. A., Di Nicola, P., Tommasini, R., Alessi, D., Bowers, M., Browning, D., Brunton, G., Budge, T., Crane, J., Di Nicola, J. -M., Doppner, T., Dixit, S., Erbert, G., Fishler, B., Halpin, J., Hamamoto, M., Heebner, J., Hernandez, V. J., Hohenberger, M., Homoelle, D., Honig, J., Hsing, W., Izumi, N., Khan, S., LaFortune, K., Lawson, J., Nagel, S. R., Negres, R. A., Novikova, L., Orth, C., Pelz, L., Prantil, M., Rushford, M., Shaw, M., Sigurdsson, R., Wegner, P., Widmayer, C., Williams, G. J., Williams, W., Whitman, P., Yang, S., Landen, O. L., & Sherlock, M.. High-energy (> 70 KeV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility. United States. doi:10.1063/1.4978493.
Chen, Hui, Hermann, M. R., Kalantar, D. H., Martinez, D. A., Di Nicola, P., Tommasini, R., Alessi, D., Bowers, M., Browning, D., Brunton, G., Budge, T., Crane, J., Di Nicola, J. -M., Doppner, T., Dixit, S., Erbert, G., Fishler, B., Halpin, J., Hamamoto, M., Heebner, J., Hernandez, V. J., Hohenberger, M., Homoelle, D., Honig, J., Hsing, W., Izumi, N., Khan, S., LaFortune, K., Lawson, J., Nagel, S. R., Negres, R. A., Novikova, L., Orth, C., Pelz, L., Prantil, M., Rushford, M., Shaw, M., Sigurdsson, R., Wegner, P., Widmayer, C., Williams, G. J., Williams, W., Whitman, P., Yang, S., Landen, O. L., and Sherlock, M.. Thu . "High-energy (> 70 KeV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility". United States. doi:10.1063/1.4978493. https://www.osti.gov/servlets/purl/1347667.
@article{osti_1347667,
title = {High-energy (> 70 KeV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility},
author = {Chen, Hui and Hermann, M. R. and Kalantar, D. H. and Martinez, D. A. and Di Nicola, P. and Tommasini, R. and Alessi, D. and Bowers, M. and Browning, D. and Brunton, G. and Budge, T. and Crane, J. and Di Nicola, J. -M. and Doppner, T. and Dixit, S. and Erbert, G. and Fishler, B. and Halpin, J. and Hamamoto, M. and Heebner, J. and Hernandez, V. J. and Hohenberger, M. and Homoelle, D. and Honig, J. and Hsing, W. and Izumi, N. and Khan, S. and LaFortune, K. and Lawson, J. and Nagel, S. R. and Negres, R. A. and Novikova, L. and Orth, C. and Pelz, L. and Prantil, M. and Rushford, M. and Shaw, M. and Sigurdsson, R. and Wegner, P. and Widmayer, C. and Williams, G. J. and Williams, W. and Whitman, P. and Yang, S. and Landen, O. L. and Sherlock, M.},
abstractNote = {Here, the Advanced Radiographic Capability (ARC) laser system at the National Ignition Facility (NIF) is designed to ultimately provide eight beamlets with a pulse duration adjustable from 1 to 30 ps, and energies up to 1.5 kJ per beamlet. Currently, four beamlets have been commissioned. In the first set of 6 commissioning target experiments, the individual beamlets were fired onto gold foil targets with energy up to 1 kJ per beamlet at 20–30 ps pulse length. The x-ray energy distribution and pulse duration were measured, yielding energy conversion efficiencies of 4–9 × 10–4 for x-rays with energies greater than 70 keV. With greater than 3 J of such x-rays, ARC provides a high-precision x-ray backlighting capability for upcoming inertial confinement fusion and high-energy-density physics experiments on NIF.},
doi = {10.1063/1.4978493},
journal = {Physics of Plasmas},
number = 3,
volume = 24,
place = {United States},
year = {Thu Mar 16 00:00:00 EDT 2017},
month = {Thu Mar 16 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 3works
Citation information provided by
Web of Science

Save / Share:
  • Cited by 3
  • Tailored, high-flux, multi-keV x-ray sources are desirable for studying x-ray interactions with matter for various civilian, space and military applications. For this study, we focus on designing an efficient laser-driven non-local thermodynamic equilibrium 3–5 keV x-ray source from photon-energy-matched Ar K-shell and Ag L-shell targets at sub-critical densities (∼n{sub c}/10) to ensure supersonic, volumetric laser heating with minimal losses to kinetic energy, thermal x rays and laser-plasma instabilities. Using HYDRA, a multi-dimensional, arbitrary Lagrangian-Eulerian, radiation-hydrodynamics code, we performed a parameter study by varying initial target density and laser parameters for each material using conditions readily achievable on the National Ignition Facilitymore » (NIF) laser. We employ a model, benchmarked against Kr data collected on the NIF, that uses flux-limited Lee-More thermal conductivity and multi-group implicit Monte-Carlo photonics with non-local thermodynamic equilibrium, detailed super-configuration accounting opacities from CRETIN, an atomic-kinetics code. While the highest power laser configurations produced the largest x-ray yields, we report that the peak simulated laser to 3–5 keV x-ray conversion efficiencies of 17.7% and 36.4% for Ar and Ag, respectively, occurred at lower powers between ∼100–150 TW. For identical initial target densities and laser illumination, the Ag L-shell is observed to have ≳10× higher emissivity per ion per deposited laser energy than the Ar K-shell. Although such low-density Ag targets have not yet been demonstrated, simulations of targets fabricated using atomic layer deposition of Ag on silica aerogels (∼20% by atomic fraction) suggest similar performance to atomically pure metal foams and that either fabrication technique may be worth pursuing for an efficient 3–5 keV x-ray source on NIF.« less
  • Multi-kilo-electron-volt x-ray microscopy will be an important laser-produced plasma diagnostic at future megajoule facilities such as the National Ignition Facility (NIF). However, laser energies and plasma characteristics imply that x-ray microscopy will be more challenging at NIF than at existing facilities. We use analytical estimates and numerical ray tracing to investigate several instrumentation options in detail, and we conclude that near-normal-incidence single spherical or toroidal crystals may offer the best general solution for high-energy x-ray microscopy at NIF and similar large facilities. Apertured Kirkpatrick{endash}Baez microscopes using multilayer mirrors may also be good options, particularly for applications requiring one-dimensional imaging overmore » narrow fields of view. {copyright} 1998 Optical Society of America« less