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Publication Citation: Absolute measurements of x-ray backlighter sources at energies above 10 keVa)

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Author(s): Lawrence T. Hudson; B.R. Maddox; H.S. Parks; B A. Remington; C. Chen; S Chen; S. T. Prisbrey; A. Comley; C A. Back; C. Szabo; John F. Seely; Uri Feldman; Stephen M. Seltzer; M. J. Haugh; Z. Ali;
Title: Absolute measurements of x-ray backlighter sources at energies above 10 keVa)
Published: February 01, 2012
Abstract: 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 x, 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 Thot scaling as 100  ðIk2Þ1=3. The continuum emissions from empty and 1 atm Kr-filled imploded CH shell targets were also measured for the use as broadband backlighters
Citation: Physics of Plasmas
Volume: 18
Pages: pp. 1 - 6
Keywords: 10 keV; absolute measurement; backlighter sources; x-ray
Research Areas: Radiation Physics
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