Assessment of an ORION-based experimental platform for measuring the opacity of high-temperature and high-density plasma

Beiersdorfer, P ; Schneider, M ; Shepherd, R

Lawrence Livermore National Laboratory

关键词: Compression;    70 Plasma Physics And Fusion Technology;    Electron Density;    Opacity;    Targets;   

DOI  :  10.2172/1046099
RP-ID  :  LLNL-TR-560931
RP-ID  :  W-7405-ENG-48
RP-ID  :  1046099

美国|英语

来源: UNT Digital Library

【 摘 要 】

The following provides an assessment of an experimental platform based on the ORION laser at AWE Aldermasten, England, for measuring the opacity of high-temperature and high-density LTE plasmas. The specific points addressed are (1) the range of electron density and temperature that can be achieved with short-pulse beams alone, as well as (2) by means of compression with a long-pulse beam; (3) the accuracy with which electron density, electron temperature, and absolute emissivity can be measured; (4) the use of pulse shaping to increase the sample density to above solid density; (5) the effect that target materials and target design have on maintaining spatial uniformity of the sample, and (6) the need for additional diagnostics to produce and characterize samples for decisive measurements.