Study of supra-thermal electrons and K-{alpha} x-rays from high intensity 500 fs laser-produced plasmas

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We describe recent laser-solid interaction experiments using the 500 fs Janus Nd:glass (1053 nm) laser presently at 1.5 TW power level. The laser beam path is enclosed in vacuum from the compressor to the target and is focused using an off-axis paraboloid. Optical diagnostics monitor the near field pattern, focal spot, spectrum, temporal shape and pre-pulse level. A 12 {mu}m diameter (FWHM) focal spot is achieved (2.5 {times} diffraction limit) corresponding to a peak irradiance of 8 {times} 1017 W cm{sup {minus}2} on target. A suite of x-ray diagnostics characterize the x-ray emission from the plasma. We present results for ... continued below

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8 p.

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Dunn, J.; Young, B.K.F.; Hankla, A.K.; Conder, A.D.; White, W.E. & Stewart, R.E. July 1, 1995.

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Description

We describe recent laser-solid interaction experiments using the 500 fs Janus Nd:glass (1053 nm) laser presently at 1.5 TW power level. The laser beam path is enclosed in vacuum from the compressor to the target and is focused using an off-axis paraboloid. Optical diagnostics monitor the near field pattern, focal spot, spectrum, temporal shape and pre-pulse level. A 12 {mu}m diameter (FWHM) focal spot is achieved (2.5 {times} diffraction limit) corresponding to a peak irradiance of 8 {times} 1017 W cm{sup {minus}2} on target. A suite of x-ray diagnostics characterize the x-ray emission from the plasma. We present results for normal incidence irradiation of high-Z (Zn, Ge, Mo, Sn) solid targets. The supra-thermal electrons produced in the short scale length plasma have temperature T{sub H} > 100 keV and can efficiently fluoresce the cold K-{alpha} lines in the 8--30 keV energy range.

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8 p.

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INIS; OSTI as DE95015936

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  • 12. international conference on laser interaction and related plasma phenomena, Osaka (Japan), 24-28 Apr 1995

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  • Other: DE95015936
  • Report No.: UCRL-JC--121568
  • Report No.: CONF-950476--6
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 102505
  • Archival Resource Key: ark:/67531/metadc628596

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  • July 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 23, 2016, 12:29 p.m.

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Dunn, J.; Young, B.K.F.; Hankla, A.K.; Conder, A.D.; White, W.E. & Stewart, R.E. Study of supra-thermal electrons and K-{alpha} x-rays from high intensity 500 fs laser-produced plasmas, article, July 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc628596/: accessed January 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.