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Title: X-ray emission from colliding laser plasmas

Abstract

Colliding Au, CD and Ti-Cr plasmas have been generated by illuminating two opposing foils each with a {approximately}100J, 0.5 nsec, 2{omega} Nd-glass laser beam from the Trident laser facility at Los Alamos. The plasmas are being used to study plasma interactions which span the parameter regime from interpenetrating to collisional stagnation. X-ray emission during the laser target interaction and the subsequent collision is used to diagnose the initial plasma conditions and the colliding plasma properties. X-ray instrumentation consists of a 100 ps gated x-ray pinhole imager, a time-integrated bremsstrahlung x-ray spectrograph and a gated x-ray spectrograph used to record isoelectronic spectra from the Ti-Cr plasmas. The imager has obtained multi-frame images of the collision and therefore, a measure of the stagnation length which is a function of the ion charge state and density and a strong function of the electron temperature. Other instrumentation includes a Thomson scattering spectrometer with probe beam, neutron detectors used to monitor the CD coated foil collisions and an ion spectrometer. The authors will describe the current status of the experiments and current results with emphasis on the x-ray emission diagnostics. They will also briefly describe the modeling using Lasnex and ISIS, a particle-in-cell code withmore » massless fluid electrons and inter particle (classical) collisions.« less

Authors:
; ;  [1]
  1. Los Alamos National Lab., NM (United States); and others
Publication Date:
OSTI Identifier:
379748
Report Number(s):
CONF-9507222-
ISBN 0-8194-1882-X; TRN: 96:025256
Resource Type:
Conference
Resource Relation:
Conference: SPIE applications of laser plasma radiation II, San Diego, CA (United States), 12-14 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Applications of laser plasma radiation 2; Richardson, M.C.; Kyrala, G.A. [eds.]; PB: 333 p.; Proceedings/SPIE, Volume 2523
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; COLLISIONAL PLASMA; PLASMA DIAGNOSTICS; X-RAY SPECTROSCOPY; INERTIAL CONFINEMENT; GOLD; TITANIUM; CHROMIUM; DEUTERIUM COMPOUNDS; LASER-PRODUCED PLASMA; NEODYMIUM LASERS; OPTICAL SYSTEMS; ION DENSITY; PLASMA SIMULATION; IMAGES

Citation Formats

Wilke, M, Obst, A W, and Winske, D. X-ray emission from colliding laser plasmas. United States: N. p., 1995. Web.
Wilke, M, Obst, A W, & Winske, D. X-ray emission from colliding laser plasmas. United States.
Wilke, M, Obst, A W, and Winske, D. Sun . "X-ray emission from colliding laser plasmas". United States.
@article{osti_379748,
title = {X-ray emission from colliding laser plasmas},
author = {Wilke, M and Obst, A W and Winske, D},
abstractNote = {Colliding Au, CD and Ti-Cr plasmas have been generated by illuminating two opposing foils each with a {approximately}100J, 0.5 nsec, 2{omega} Nd-glass laser beam from the Trident laser facility at Los Alamos. The plasmas are being used to study plasma interactions which span the parameter regime from interpenetrating to collisional stagnation. X-ray emission during the laser target interaction and the subsequent collision is used to diagnose the initial plasma conditions and the colliding plasma properties. X-ray instrumentation consists of a 100 ps gated x-ray pinhole imager, a time-integrated bremsstrahlung x-ray spectrograph and a gated x-ray spectrograph used to record isoelectronic spectra from the Ti-Cr plasmas. The imager has obtained multi-frame images of the collision and therefore, a measure of the stagnation length which is a function of the ion charge state and density and a strong function of the electron temperature. Other instrumentation includes a Thomson scattering spectrometer with probe beam, neutron detectors used to monitor the CD coated foil collisions and an ion spectrometer. The authors will describe the current status of the experiments and current results with emphasis on the x-ray emission diagnostics. They will also briefly describe the modeling using Lasnex and ISIS, a particle-in-cell code with massless fluid electrons and inter particle (classical) collisions.},
doi = {},
url = {https://www.osti.gov/biblio/379748}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {12}
}

Conference:
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