Absolute Measurements Of X-Ray Backlighter Sources At Energies Above 10 Kev
PHYSICS OF PLASMAS(2011)
摘要
Line emission and broadband x-ray sources with x-ray energies above 10 keV have been investigated using a range of calibrated x-ray detectors for use as x-ray backlighters in high energy density (HED) experiments. The conversion efficiency of short-and long-pulse driven Mo and Ag line-emission backlighters at 17 and 22 keV was measured to investigate the crossover region between short-and long-pulse conversion efficiency. It was found that significant 17 and 22 keV line emissions were observed using a 3 omega, 1 ns long-pulse drive for Mo and Ag targets and a comparison between the measured Mo x-ray spectrum and calculations using an atomic physics code suggests that the line emission is due to thermal emission from N-like Mo atoms. Electron temperatures derived from fits to the continuum region of the x-ray spectra agree well with the T-hot scaling as 100 x (I lambda(2))(1/3). The continuum emissions from empty and 1 atm Kr-filled imploded CH shell targets were also measured for the use as broadband backlighters. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3582134]
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关键词
x ray detector,electromagnetic radiation,gamma ray,spectrum,conversion efficiency,electron temperature
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