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Title: Soft X-ray spectrometer design for warm dense plasma measurements on DARHT Axis-I

Abstract

A preliminary design study is being performed on a soft X-ray spectrometer to measure K-shell spectra emitted by a warm dense plasma generated on Axis-I of the Dual-Axis Radiographic Hydrodynamic Testing (DARHT) facility at Los Alamos National Laboratory. The 100-ns-long intense, relativistic electron pulse with a beam current of 1.7 kA and energy of 19.8 MeV deposits energy into a thin metal foil heating it to a warm dense plasma. The collisional ionization of the target by the electron beam produces an anisotropic angular distribution of K-shell radiation and a continuum of both scattered electrons and Bremsstrahlung up to the beam energy of 19.8 MeV. The principal goal of this project is to characterize these angular distributions to determine the optimal location to deploy the soft X-ray spectrometer. In addition, a proof-of-principle design will be presented. The ultimate goal of the spectrometer is to obtain measurements of the plasma temperature and density to benchmark equation-of-state models of the warm dense matter regime.

Authors:
 [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1369166
Report Number(s):
LA-UR-17-25600
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Ramey, Nicholas Bryan, Perry, John Oliver, and Coleman, Joshua Eugene. Soft X-ray spectrometer design for warm dense plasma measurements on DARHT Axis-I. United States: N. p., 2017. Web. doi:10.2172/1369166.
Ramey, Nicholas Bryan, Perry, John Oliver, & Coleman, Joshua Eugene. Soft X-ray spectrometer design for warm dense plasma measurements on DARHT Axis-I. United States. doi:10.2172/1369166.
Ramey, Nicholas Bryan, Perry, John Oliver, and Coleman, Joshua Eugene. Tue . "Soft X-ray spectrometer design for warm dense plasma measurements on DARHT Axis-I". United States. doi:10.2172/1369166. https://www.osti.gov/servlets/purl/1369166.
@article{osti_1369166,
title = {Soft X-ray spectrometer design for warm dense plasma measurements on DARHT Axis-I},
author = {Ramey, Nicholas Bryan and Perry, John Oliver and Coleman, Joshua Eugene},
abstractNote = {A preliminary design study is being performed on a soft X-ray spectrometer to measure K-shell spectra emitted by a warm dense plasma generated on Axis-I of the Dual-Axis Radiographic Hydrodynamic Testing (DARHT) facility at Los Alamos National Laboratory. The 100-ns-long intense, relativistic electron pulse with a beam current of 1.7 kA and energy of 19.8 MeV deposits energy into a thin metal foil heating it to a warm dense plasma. The collisional ionization of the target by the electron beam produces an anisotropic angular distribution of K-shell radiation and a continuum of both scattered electrons and Bremsstrahlung up to the beam energy of 19.8 MeV. The principal goal of this project is to characterize these angular distributions to determine the optimal location to deploy the soft X-ray spectrometer. In addition, a proof-of-principle design will be presented. The ultimate goal of the spectrometer is to obtain measurements of the plasma temperature and density to benchmark equation-of-state models of the warm dense matter regime.},
doi = {10.2172/1369166},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 11 00:00:00 EDT 2017},
month = {Tue Jul 11 00:00:00 EDT 2017}
}

Technical Report:

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