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

Banasek, J. T.; Rocco, S. V.  R.; Potter, W. M.; Byvank, T.; Kusse, B. R.; Hammer, D. A.

doi:10.1063/1.5034310

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

Journal Article · Wed Sep 26 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5034310· OSTI ID:1499985

^[1]; ^[2]; Potter, W. M. ^[2]; ^[2]; Kusse, B. R. ^[2]; ^[2]

Cornell Univ., Ithaca, NY (United States). Lab. of Plasma Studies; Cornell University
Cornell Univ., Ithaca, NY (United States). Lab. of Plasma Studies

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.

View Accepted Manuscript (DOE)

Research Organization:: Cornell Univ., Ithaca, NY (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0001836; NA0003764

OSTI ID:: 1499985

Alternate ID(s):: OSTI ID: 1474005

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 89; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

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Time-resolved and multiple-angle Thomson scattering on gas-puff Z-Pinch plasmas at pinch time Rocco, Sophia V. R.; Banasek, Jacob T.; Potter, William M. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038879	journal	October 2018
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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Thomson scattering
bremsstrahlung
electron density
laser applications
lasers
optical metrology
plasma confinement
streak cameras

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

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References (23)

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