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Title: Backlighter development at the National Ignition Facility (NIF). Zinc to Zirconium

Abstract

A K-shell X-ray emission from laser-irradiated planar Zn, Ge, Br, and Zr foils was measured at the National Ignition Facility for laser irradiances in the range of 0.6–9.5 × 1015 W/cm 2. The incident laser power had a pre-pulse to enhance the laser-to-X-ray conversion efficiency (CE) of a 2–5 ns constant-intensity pulse used as the main laser drive. The measured CE into the 8–16 keV energy band ranged from 0.43% to 2%, while the measured CE into the He-like resonance 1s2–1s2p(1P) and intercombination 1s2–1s2p(3P) transitions, as well as from their 1s2(2s,2p)l–1s2p(2s,2p)l satellite transitions for l = 1, 2, 3, corresponding to the Li-, Be-, and B-like resonances, respectively, ranged from 0.3% to 1.5%. Moreover, absolute and relative CE measurements are consistent with X-ray energy scaling of (hν) -3 to (hν) -5, where hν is the X-ray energy. The temporal evolution of the broadband X-ray power was similar to the main laser drive for ablation plasmas having a critical density surface.

Authors:
 [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1]
+ Show Author Affiliations
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, NY (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1237551
Report Number(s):
LLNL-JRNL-638536
Journal ID: ISSN 1574-1818
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
High Energy Density Physics
Additional Journal Information:
Journal Volume: 9; Journal Issue: 3; Journal ID: ISSN 1574-1818
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUMM MECHANICS, GENERAL PHYSICS; 70 PLASMA PHYSICS AND FUSION; x-ray emission; conversion efficiency; backlighter foils

Citation Formats

Barrios, M. A., Fournier, K. B., Regan, S. P., Landen, O., May, M., Opachich, Y. P., Widmann, K., Bradley, D. K., and Collins, G. W. Backlighter development at the National Ignition Facility (NIF). Zinc to Zirconium. United States: N. p., 2013. Web. doi:10.1016/j.hedp.2013.05.018.
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Barrios, M. A., Fournier, K. B., Regan, S. P., Landen, O., May, M., Opachich, Y. P., Widmann, K., Bradley, D. K., & Collins, G. W. Backlighter development at the National Ignition Facility (NIF). Zinc to Zirconium. United States. doi:10.1016/j.hedp.2013.05.018.
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Barrios, M. A., Fournier, K. B., Regan, S. P., Landen, O., May, M., Opachich, Y. P., Widmann, K., Bradley, D. K., and Collins, G. W. Fri . "Backlighter development at the National Ignition Facility (NIF). Zinc to Zirconium". United States. doi:10.1016/j.hedp.2013.05.018. https://www.osti.gov/servlets/purl/1237551.
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@article{osti_1237551,
title = {Backlighter development at the National Ignition Facility (NIF). Zinc to Zirconium},
author = {Barrios, M. A. and Fournier, K. B. and Regan, S. P. and Landen, O. and May, M. and Opachich, Y. P. and Widmann, K. and Bradley, D. K. and Collins, G. W.},
abstractNote = {A K-shell X-ray emission from laser-irradiated planar Zn, Ge, Br, and Zr foils was measured at the National Ignition Facility for laser irradiances in the range of 0.6–9.5 × 1015 W/cm 2. The incident laser power had a pre-pulse to enhance the laser-to-X-ray conversion efficiency (CE) of a 2–5 ns constant-intensity pulse used as the main laser drive. The measured CE into the 8–16 keV energy band ranged from 0.43% to 2%, while the measured CE into the He-like resonance 1s2–1s2p(1P) and intercombination 1s2–1s2p(3P) transitions, as well as from their 1s2(2s,2p)l–1s2p(2s,2p)l satellite transitions for l = 1, 2, 3, corresponding to the Li-, Be-, and B-like resonances, respectively, ranged from 0.3% to 1.5%. Moreover, absolute and relative CE measurements are consistent with X-ray energy scaling of (hν) -3 to (hν) -5, where hν is the X-ray energy. The temporal evolution of the broadband X-ray power was similar to the main laser drive for ablation plasmas having a critical density surface.},
doi = {10.1016/j.hedp.2013.05.018},
journal = {High Energy Density Physics},
number = 3,
volume = 9,
place = {United States},
year = {2013},
month = {6}
}
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DOI:  10.1016/j.hedp.2013.05.018
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Works referencing / citing this record:

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journal, December 2019

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Crystal structure and equation of state of Fe-Si alloys at super-Earth core conditions
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