X-ray emission from KrF laser-produced Al plasmas

Matsumoto, Y.; Shaw, M. J.; O’Neill, F.; Partanen, J. P.; Key, M. H.; Eason, R.; Ross, I. N.; Hodgson, E. M.; Sakagami, Y.
January 1985
Applied Physics Letters;Jan1985, Vol. 46 Issue 1, p28
Academic Journal
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


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