Study of supra-thermal electrons and {ital K}-{alpha} x-rays from high intensity 500 fs laser-produced plasmas
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551 (United States)
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}10{sup 17} Wcm{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 {ital T}{sub {ital H}}{gt}100 keV and can efficiently fluoresce the cold {ital K}-{alpha} lines in the 8{endash}30 keV energy range. {copyright} {ital 1996 American Institute of Physics.}
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 397286
- Report Number(s):
- CONF-950476-; ISSN 0094-243X; TRN: 96:029372
- Journal Information:
- AIP Conference Proceedings, Vol. 369, Issue 1; Conference: 12. international conference on laser interaction and related plasma phenomena, Osaka (Japan), 24-28 Apr 1995; Other Information: PBD: May 1996
- Country of Publication:
- United States
- Language:
- English
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