Z dependence of sub-keV x rays emitted by laser-produced plasmas

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Recent results obtained by using a 10 channel, filtered XRD detector system to record sub-keV x-ray emission from laser-irradiated targets are reported. Targets materials were Be, Al, Ti, Sn, Au and U, with Z ranging from 4 to 92. Targets were irradiated with 1ns FWHM, 1.06 ..mu..m wavelength pulses at an intensity of 5 x 10/sup 14/ W/cm/sup 2/. Time-resolved x-ray emission pulses show systematic and striking variations with Z. These variations can most probably be attributed to the onset of inhibited electron conduction. Time-integrated x-ray yields are obtained as a function of target Z as well as calculated charge ... continued below

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Pages: 13

Creation Information

Lee, P.H.Y.; Tirsell, K.G.; Campbell, E.M.; McClellan, G. & Rosen, M.D. November 6, 1979.

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  • Lawrence Livermore Laboratory
    Publisher Info: California Univ., Livermore (USA). Lawrence Livermore Lab.
    Place of Publication: Livermore, California

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Description

Recent results obtained by using a 10 channel, filtered XRD detector system to record sub-keV x-ray emission from laser-irradiated targets are reported. Targets materials were Be, Al, Ti, Sn, Au and U, with Z ranging from 4 to 92. Targets were irradiated with 1ns FWHM, 1.06 ..mu..m wavelength pulses at an intensity of 5 x 10/sup 14/ W/cm/sup 2/. Time-resolved x-ray emission pulses show systematic and striking variations with Z. These variations can most probably be attributed to the onset of inhibited electron conduction. Time-integrated x-ray yields are obtained as a function of target Z as well as calculated charge states anti Z, indicating the type of physical processes that give rise to the x-ray emission. Typical sub-keV x-ray spectra are presented; in some cases such as Ti where prominent lines are present, the charge state of the plasma can be directly deduced from line ratios, agreement with numerical simulation is very good.

Physical Description

Pages: 13

Notes

Dep. NTIS, PC A02/MF A01.

Source

  • 21. annual meeting of the American Physical Society, Boston, MA, USA, 12 Nov 1979

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  • Report No.: UCRL-83056
  • Report No.: CONF-791135-7
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 5634551
  • Archival Resource Key: ark:/67531/metadc1092882

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Office of Scientific & Technical Information Technical Reports

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  • November 6, 1979

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  • Feb. 10, 2018, 10:06 p.m.

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  • May 8, 2018, 2:21 p.m.

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Lee, P.H.Y.; Tirsell, K.G.; Campbell, E.M.; McClellan, G. & Rosen, M.D. Z dependence of sub-keV x rays emitted by laser-produced plasmas, article, November 6, 1979; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc1092882/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.