Spectroscopic measurements of Rosseland mean opacity

Conference · Sun Nov 01 04:00:00 EST 1992

OSTI ID:10133566

Springer, P T; Fields, D F; Wilson, B G ^[1]

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1. and others

The first quantitative measurement of photoabsorption in the region determining Rosseland and Planck mean opacity, is obtained for an x-ray heated iron plasma, using novel techniques and instrumentation. The plasma density of 0.0113 {plus_minus} 0.0013 g/cc and temperature of 59 {plus_minus} 3 eV are accurately constrained experimentally by imaging plasma expansion and observing and modeling absorption in sodium dopant ions. The measured iron absorption spectrum is compared with several newly developed opacity models. The data constrains Rosseland and Planck group means with of order 15 percent precision. This is the first quantitative experimental certification of opacity models germane to radiative transfer in LTE plasmas.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10133566
• Report Number(s): UCRL-JC--116851; CONF-9211211--5; ON: DE94008297
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104
661300
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700000
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
IRON
OPACITY
OTHER ASPECTS OF PHYSICAL SCIENCE
PHYSICAL PROPERTIES
PLASMA
PLASMA DENSITY
PLASMA PHYSICS AND FUSION