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

Beiersdorfer, P ; Schneider, M ; Shepherd, R

关键词: ACCURACY;    COMPRESSION;    DESIGN;    ELECTRON DENSITY;    ELECTRON TEMPERATURE;    EMISSIVITY;    LASERS;    OPACITY;    PLASMA;    TARGETS;   

DOI  :  10.2172/1046099
RP-ID  :  LLNL-TR-560931
PID  :  OSTI ID: 1046099
Others  :  TRN: US1203748

学科分类：原子、分子光学和等离子物理

美国|英语

来源: SciTech Connect

【 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.