Hard x-ray emission in high intensity femtosecond laser{endash}target interaction
- INRS Energie et Materiaux, Univ. du Quebec, Varennes, J3X 1S2 P.Q. (Canada)
- Department of Radiology, SUNY Health Science Center, Syracuse, New York (United States)
Hard x-ray spectra (10{endash}100 keV) created in high contrast, 400 fs, laser pulse interaction with solid targets, have been studied for laser intensities in the 10{sup 17}{endash}10{sup 19}&hthinsp;W/cm{sup 2} range. The target atomic numbers ({ital Z}) extended from Z=13 to Z=73. The measured conversion efficiency at Ag K{sub {alpha}} emission line was 10{sup {minus}3}{percent} at 5{times}10{sup 18}&hthinsp;W/cm{sup 2}. It has been confirmed that the hot electron temperature increased as (I{lambda}{sup 2}){sup 1/3} and the fraction of laser energy in hot electrons follows scaling law of (I{lambda}{sup 2}){sup 3/4}. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 341175
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 6; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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