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Title: Multi-angle multi-pulse time-resolved Thomson scattering on laboratory plasma jets

Abstract

A single channel sub-nanosecond time-resolved Thomson scattering system used for pulsed power-driven high energy density plasma measurements has been upgraded to give electron temperatures at two different times and from two different angles simultaneously. This system was used here to study plasma jets created from a 15 μm thick radial Al foil load on a 1 MA pulsed power machine. Two laser pulses were generated by splitting the initial 2.3 ns duration, 10 J, 526.5 nm laser beam into two pulses, each with 2.5 J, and delaying one relative to the other by between 3 and 14 ns. Time resolution within each pulse was obtained using a streak camera to record the scattered spectra from the two beams from two scattering angles. Analysis of the scattering profile showed that the electron temperature of the Al jet increased from 20 eV up to as much as 45 eV within about 2 ns by inverse bremsstrahlung for both laser pulses. The Thomson scattering results from jets formed with opposite current polarities showed different laser heating of the electrons, as well as possibly different ion temperatures. The two-angle scattering determined that the electron density of the plasma jet was at least 2 ×more » 1018 cm-3.« less

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Cornell Univ., Ithaca, NY (United States). Lab. of Plasma Studies
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1499985
Alternate Identifier(s):
OSTI ID: 1474005
Grant/Contract Number:  
NA0003764; NA0001836
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Thomson scattering; electron density; plasma confinement; bremsstrahlung; laser applications; lasers; optical metrology; streak cameras

Citation Formats

Banasek, J. T., Rocco, S. V. R., Potter, W. M., Byvank, T., Kusse, B. R., and Hammer, D. A. Multi-angle multi-pulse time-resolved Thomson scattering on laboratory plasma jets. United States: N. p., 2018. Web. doi:10.1063/1.5034310.
Banasek, J. T., Rocco, S. V. R., Potter, W. M., Byvank, T., Kusse, B. R., & Hammer, D. A. Multi-angle multi-pulse time-resolved Thomson scattering on laboratory plasma jets. United States. doi:10.1063/1.5034310.
Banasek, J. T., Rocco, S. V. R., Potter, W. M., Byvank, T., Kusse, B. R., and Hammer, D. A. Wed . "Multi-angle multi-pulse time-resolved Thomson scattering on laboratory plasma jets". United States. doi:10.1063/1.5034310. https://www.osti.gov/servlets/purl/1499985.
@article{osti_1499985,
title = {Multi-angle multi-pulse time-resolved Thomson scattering on laboratory plasma jets},
author = {Banasek, J. T. and Rocco, S. V. R. and Potter, W. M. and Byvank, T. and Kusse, B. R. and Hammer, D. A.},
abstractNote = {A single channel sub-nanosecond time-resolved Thomson scattering system used for pulsed power-driven high energy density plasma measurements has been upgraded to give electron temperatures at two different times and from two different angles simultaneously. This system was used here to study plasma jets created from a 15 μm thick radial Al foil load on a 1 MA pulsed power machine. Two laser pulses were generated by splitting the initial 2.3 ns duration, 10 J, 526.5 nm laser beam into two pulses, each with 2.5 J, and delaying one relative to the other by between 3 and 14 ns. Time resolution within each pulse was obtained using a streak camera to record the scattered spectra from the two beams from two scattering angles. Analysis of the scattering profile showed that the electron temperature of the Al jet increased from 20 eV up to as much as 45 eV within about 2 ns by inverse bremsstrahlung for both laser pulses. The Thomson scattering results from jets formed with opposite current polarities showed different laser heating of the electrons, as well as possibly different ion temperatures. The two-angle scattering determined that the electron density of the plasma jet was at least 2 × 1018 cm-3.},
doi = {10.1063/1.5034310},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {9}
}

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Cited by: 2 works
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Works referenced in this record:

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    Works referencing / citing this record:

    Improvement in Thomson scattering diagnostic precision via fitting the multiple-wavenumber spectra simultaneously
    journal, August 2019

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    • Review of Scientific Instruments, Vol. 90, Issue 8
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    Time-resolved and multiple-angle Thomson scattering on gas-puff Z-Pinch plasmas at pinch time
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