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Title: Electron density measurement of a colliding plasma using soft x-ray laser interferometry

Abstract

The understanding of the collision and subsequent interaction of counter-streaming high-density plasmas is important for the design of indirectly-driven inertial confinement fusion (ICF) hohlraums. We have employed a soft x-ray Mach-Zehnder interferometer, using a Ne- like Y x-ray laser at 155 {angstrom} as the probe source, to study interpenetration and stagnation of two colliding plasmas. We observed a peaked density profile at the symmetry axis with a wide stagnation region with width of order 100 {mu}m. We compare the measured density profile with density profiles calculated by the radiation hydrodynamic code LASNEX and a multi-specie fluid code which allows for interpenetration. The measured density profile falls in between the calculated profiles using collisionless and fluid approximations. By using different target materials and irradiation configurations, we can vary the collisionality of the plasma. We hope to use the soft x-ray laser interferometry as a mechanism to validate and benchmark our numerical codes used for the design and analysis of high-energy- density physics experiments.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
276923
Report Number(s):
UCRL-JC-123154; CONF-9606229-6
ON: DE96012518; TRN: 96:020728
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 24. European conference on laser interaction with matter, Madrid (Spain), 3-7 Jun 1996; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; LASER-PRODUCED PLASMA; PLASMA DIAGNOSTICS; INDIRECT DRIVE LASER IMPLOSION; ELECTRON DENSITY; INERTIAL CONFINEMENT; SOFT X RADIATION; MACH-ZEHNDER INTERFEROMETER; X-RAY LASERS; LASER SPECTROSCOPY; BENCHMARKS; L CODES; HYDRODYNAMICS

Citation Formats

Wan, A S, Back, C A, Barbee, Jr, T W, Cauble, R, Celliers, P, DaSilva, L B, Glenzer, S, Moreno, J C, Rambo, P W, Stone, G F, Trebes, J E, and Weber, F. Electron density measurement of a colliding plasma using soft x-ray laser interferometry. United States: N. p., 1996. Web. doi:10.2172/279553.
Wan, A S, Back, C A, Barbee, Jr, T W, Cauble, R, Celliers, P, DaSilva, L B, Glenzer, S, Moreno, J C, Rambo, P W, Stone, G F, Trebes, J E, & Weber, F. Electron density measurement of a colliding plasma using soft x-ray laser interferometry. United States. https://doi.org/10.2172/279553
Wan, A S, Back, C A, Barbee, Jr, T W, Cauble, R, Celliers, P, DaSilva, L B, Glenzer, S, Moreno, J C, Rambo, P W, Stone, G F, Trebes, J E, and Weber, F. 1996. "Electron density measurement of a colliding plasma using soft x-ray laser interferometry". United States. https://doi.org/10.2172/279553. https://www.osti.gov/servlets/purl/276923.
@article{osti_276923,
title = {Electron density measurement of a colliding plasma using soft x-ray laser interferometry},
author = {Wan, A S and Back, C A and Barbee, Jr, T W and Cauble, R and Celliers, P and DaSilva, L B and Glenzer, S and Moreno, J C and Rambo, P W and Stone, G F and Trebes, J E and Weber, F},
abstractNote = {The understanding of the collision and subsequent interaction of counter-streaming high-density plasmas is important for the design of indirectly-driven inertial confinement fusion (ICF) hohlraums. We have employed a soft x-ray Mach-Zehnder interferometer, using a Ne- like Y x-ray laser at 155 {angstrom} as the probe source, to study interpenetration and stagnation of two colliding plasmas. We observed a peaked density profile at the symmetry axis with a wide stagnation region with width of order 100 {mu}m. We compare the measured density profile with density profiles calculated by the radiation hydrodynamic code LASNEX and a multi-specie fluid code which allows for interpenetration. The measured density profile falls in between the calculated profiles using collisionless and fluid approximations. By using different target materials and irradiation configurations, we can vary the collisionality of the plasma. We hope to use the soft x-ray laser interferometry as a mechanism to validate and benchmark our numerical codes used for the design and analysis of high-energy- density physics experiments.},
doi = {10.2172/279553},
url = {https://www.osti.gov/biblio/276923}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed May 01 00:00:00 EDT 1996},
month = {Wed May 01 00:00:00 EDT 1996}
}

Conference:
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