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Title: Opacity measurements at Z.

Abstract

Abstract not provided.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1264618
Report Number(s):
SAND2006-1649C
525922
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the 6th International Conference on High energy Density Laboratory Astrophysics held March 11-14, 2006 in Houston, TX.
Country of Publication:
United States
Language:
English

Citation Formats

Bailey, James E., Campbell, Robert B., Chandler, Gordon Andrew, Lemke, Raymond W, Mehlhorn, Thomas Alan, Rochau, Gregory Alan, GOLOVKIN, I.E., Iglesias, C., MacFarlane, J. J., Mancini, Roberto Claudio, and Wang, P. Opacity measurements at Z.. United States: N. p., 2006. Web.
Bailey, James E., Campbell, Robert B., Chandler, Gordon Andrew, Lemke, Raymond W, Mehlhorn, Thomas Alan, Rochau, Gregory Alan, GOLOVKIN, I.E., Iglesias, C., MacFarlane, J. J., Mancini, Roberto Claudio, & Wang, P. Opacity measurements at Z.. United States.
Bailey, James E., Campbell, Robert B., Chandler, Gordon Andrew, Lemke, Raymond W, Mehlhorn, Thomas Alan, Rochau, Gregory Alan, GOLOVKIN, I.E., Iglesias, C., MacFarlane, J. J., Mancini, Roberto Claudio, and Wang, P. Wed . "Opacity measurements at Z.". United States. doi:. https://www.osti.gov/servlets/purl/1264618.
@article{osti_1264618,
title = {Opacity measurements at Z.},
author = {Bailey, James E. and Campbell, Robert B. and Chandler, Gordon Andrew and Lemke, Raymond W and Mehlhorn, Thomas Alan and Rochau, Gregory Alan and GOLOVKIN, I.E. and Iglesias, C. and MacFarlane, J. J. and Mancini, Roberto Claudio and Wang, P.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2006},
month = {Wed Mar 01 00:00:00 EST 2006}
}

Conference:
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  • Abstract not provided.
  • Abstract not provided.
  • The National Ignition Facility (NIF) Opacity Spectrometer (OpSpec) is a modular spectrometer designed initially for opacity experiments on NIF. The design of the OpSpec is presented in light of the requirements and constraints. Potential dispersing elements and detector configurations are presented, and the advantages and disadvantages of each configuration are discussed. The full OpSpec design covers the energy range from approximately 550 eV to 2 keV. The energy resolution of the OpSpec is E/ΔE> 500. Applications of the OpSpec are discussed, including relevant astrophysical applications for NIF experiments, and will complement recently published work on the Z machine (Bailey, etmore » al., Nature 517, 56-59 [2015]).« less
  • We are attempting to measure the transmission of iron on Z at plasma temperatures and densities relevant to the solar radiation and convection zone boundary. The opacity data published by us to date has been taken at an electron density about a factor of 10 below the 9 x 10{sup 22}/cm{sup 3} electron density of this boundary. We present results of two-dimensional (2D) simulations of the heating and expansion of an opacity sample driven by the dynamic Hohlraum radiation source on Z. The aim of the simulations is to design foil samples that provide opacity data at increased density. Themore » inputs or source terms for the simulations are spatially and temporally varying radiation temperatures with a Lambertian angular distribution. These temperature profiles were inferred on Z with on-axis time-resolved pinhole cameras, x-ray diodes, and bolometers. A typical sample is 0.3{micro}m of magnesium and 0.078{micro}m of iron sandwiched between 10{micro}m layers of plastic. The 2D LASNEX simulations indicate that to increase the density of the sample one should increase the thickness of the plastic backing.« less