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



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


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
Physics of Plasmas


10 keV, absolute measurement, backlighter sources, x-ray


Hudson, L. , Maddox, B. , Parks, H. , Remington, B. , Chen, C. , Chen, S. , Prisbrey, S. , , A. , Back, C. , , C. , Seely, J. , Feldman, U. , Seltzer, S. , Haugh, M. and Ali, Z. (2012), Absolute measurements of x-ray backlighter sources at energies above 10 keVa), Physics of Plasmas, [online], (Accessed April 12, 2024)
Created February 1, 2012, Updated February 19, 2017