Soft x-ray emission produced by a sub-picosecond laser in a single- and double-pulse scheme
- INRS-Energie et Materiaux, P.O. Box 1020, Varennes, Quebec J3X 1S2 (Canada)
The interaction of a high-contrast, 400 fs, 5{times}10{sup 17} W/cm{sup 2} laser pulse with a preformed tantalum plasma produced in a double-pulse configuration is investigated. The x-ray emission characteristics are studied for different time delays between the two laser pulses. A time-resolved transmission grating spectrometer is used to measure the x-ray conversion efficiency and emission duration in the 0.2{endash}1.2 keV energy range. Our results show that it is possible to increase the x-ray source conversion efficiency by an order of magnitude simply by optimizing the delay between the laser pulses. To give an overview of the performances available from such laser-plasma x-ray sources, these results are compared those obtained with a single laser pulse in different interaction regimes. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 496646
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 9 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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