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Title: Minimizing scatter-losses during pre-heat for magneto-inertial fusion targets

Abstract

Here, the size, temporal and spatial shape, and energy content of a laser pulse for the pre-heat phase of magneto-inertial fusion affect the ability to penetrate the window of the laser-entrance-hole and to heat the fuel behind it. High laser intensities and dense targets are subject to laser-plasma-instabilities (LPI), which can lead to an effective loss of pre-heat energy or to pronounced heating of areas that should stay unexposed. While this problem has been the subject of many studies over the last decades, the investigated parameters were typically geared towards traditional laser driven Inertial Confinement Fusion (ICF) with densities either at 10% and above or at 1% and below the laser's critical density, electron temperatures of 3–5 keV, and laser powers near (or in excess of) 1 × 10 15 W/cm 2. In contrast, Magnetized Liner Inertial Fusion (MagLIF) currently operates at 5% of the laser's critical density using much thicker windows (1.5–3.5 μm) than the sub-micron thick windows of traditional ICF hohlraum targets. This article describes the Pecos target area at Sandia National Laboratories using the Z-Beamlet Laser Facility as a platform to study laser induced pre-heat for magneto-inertial fusion targets, and the related progress for Sandia's MagLIF program.more » Forward and backward scattered light were measured and minimized at larger spatial scales with lower densities, temperatures, and powers compared to LPI studies available in literature.« less

Authors:
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  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1459929
Alternate Identifier(s):
OSTI ID: 1422024; OSTI ID: 1459911
Report Number(s):
SAND-2018-6872J
Journal ID: ISSN 1070-664X; 664963; TRN: US1901826
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 2; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Geissel, Matthias, Harvey-Thompson, Adam J., Awe, Thomas J., Bliss, David E., Glinsky, Michael E., Gomez, Matthew R., Harding, Eric, Hansen, Stephanie B., Jennings, Christopher, Kimmel, Mark W., Knapp, Patrick, Lewis, Sean M., Peterson, Kyle, Schollmeier, Marius, Schwarz, Jens, Shores, Jonathon E., Slutz, Stephen A., Sinars, Daniel B., Smith, Ian C., Speas, C. Shane, Vesey, Roger A., Weis, Matthew R., and Porter, John L. Minimizing scatter-losses during pre-heat for magneto-inertial fusion targets. United States: N. p., 2018. Web. doi:10.1063/1.5003038.
Geissel, Matthias, Harvey-Thompson, Adam J., Awe, Thomas J., Bliss, David E., Glinsky, Michael E., Gomez, Matthew R., Harding, Eric, Hansen, Stephanie B., Jennings, Christopher, Kimmel, Mark W., Knapp, Patrick, Lewis, Sean M., Peterson, Kyle, Schollmeier, Marius, Schwarz, Jens, Shores, Jonathon E., Slutz, Stephen A., Sinars, Daniel B., Smith, Ian C., Speas, C. Shane, Vesey, Roger A., Weis, Matthew R., & Porter, John L. Minimizing scatter-losses during pre-heat for magneto-inertial fusion targets. United States. doi:10.1063/1.5003038.
Geissel, Matthias, Harvey-Thompson, Adam J., Awe, Thomas J., Bliss, David E., Glinsky, Michael E., Gomez, Matthew R., Harding, Eric, Hansen, Stephanie B., Jennings, Christopher, Kimmel, Mark W., Knapp, Patrick, Lewis, Sean M., Peterson, Kyle, Schollmeier, Marius, Schwarz, Jens, Shores, Jonathon E., Slutz, Stephen A., Sinars, Daniel B., Smith, Ian C., Speas, C. Shane, Vesey, Roger A., Weis, Matthew R., and Porter, John L. Wed . "Minimizing scatter-losses during pre-heat for magneto-inertial fusion targets". United States. doi:10.1063/1.5003038. https://www.osti.gov/servlets/purl/1459929.
@article{osti_1459929,
title = {Minimizing scatter-losses during pre-heat for magneto-inertial fusion targets},
author = {Geissel, Matthias and Harvey-Thompson, Adam J. and Awe, Thomas J. and Bliss, David E. and Glinsky, Michael E. and Gomez, Matthew R. and Harding, Eric and Hansen, Stephanie B. and Jennings, Christopher and Kimmel, Mark W. and Knapp, Patrick and Lewis, Sean M. and Peterson, Kyle and Schollmeier, Marius and Schwarz, Jens and Shores, Jonathon E. and Slutz, Stephen A. and Sinars, Daniel B. and Smith, Ian C. and Speas, C. Shane and Vesey, Roger A. and Weis, Matthew R. and Porter, John L.},
abstractNote = {Here, the size, temporal and spatial shape, and energy content of a laser pulse for the pre-heat phase of magneto-inertial fusion affect the ability to penetrate the window of the laser-entrance-hole and to heat the fuel behind it. High laser intensities and dense targets are subject to laser-plasma-instabilities (LPI), which can lead to an effective loss of pre-heat energy or to pronounced heating of areas that should stay unexposed. While this problem has been the subject of many studies over the last decades, the investigated parameters were typically geared towards traditional laser driven Inertial Confinement Fusion (ICF) with densities either at 10% and above or at 1% and below the laser's critical density, electron temperatures of 3–5 keV, and laser powers near (or in excess of) 1 × 1015 W/cm2. In contrast, Magnetized Liner Inertial Fusion (MagLIF) currently operates at 5% of the laser's critical density using much thicker windows (1.5–3.5 μm) than the sub-micron thick windows of traditional ICF hohlraum targets. This article describes the Pecos target area at Sandia National Laboratories using the Z-Beamlet Laser Facility as a platform to study laser induced pre-heat for magneto-inertial fusion targets, and the related progress for Sandia's MagLIF program. Forward and backward scattered light were measured and minimized at larger spatial scales with lower densities, temperatures, and powers compared to LPI studies available in literature.},
doi = {10.1063/1.5003038},
journal = {Physics of Plasmas},
number = 2,
volume = 25,
place = {United States},
year = {2018},
month = {2}
}

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