X-ray emission from KrF laser-produced Al plasmas
- 1 January 1985
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 46 (1) , 28-30
- https://doi.org/10.1063/1.95838
Abstract
A high power (200 J, 50 ns) 249‐nm KrF laser has been focused onto solid Al targets in vacuum at a peak irradiance of 3×1013 W cm−2. High‐temperature (>200 eV) plasmas are produced and x‐ray measurements show intense emission of the resonance spectra of Al XII and Al XIII in the wavelength range 0.6–0.8 nm. Absolute x‐ray intensity measurements indicate a maximum source brightness of 1.1×1017 erg cm−2 s−1 sterad−1 in Δν/ν=10−3 (Al XII, 1 1S0–2 1P1, 0.776 nm) and a conversion efficiency from laser power to x‐ray power of 0.2% for 1.5 keV<hν<2.5 keV.Keywords
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