X-ray spectral measurement of high-temperature plasma parameters in porous targets irradiated with high-power laser pulses

Authors :: Gavrilov, V.V.
Gol'tsov, A.Yu.
Koval'skii, N.G.
Koptyaev, S.N.
Magunov, A.I.
Pikuz, T.A.
Skobelev, I.Yu.
Faenov, A.Ya.
Source :: Quantum Electronics; February 14, 2002, Vol. 31 Issue: 12 p1071-1074, 4p
Publication Year :: 2002
Abstract: The X-ray spectra of multiply charged ions were recorded from planar agar (C<subscript>12</subscript>H<subscript>18</subscript>O<subscript>9</subscript>)<subscript>n</subscript> based targets with an average density of 2 mg cm<superscript>-3</superscript> irradiated by high-power laser pulses (λ=1.054 μm, τ=2.5 ns, I <IMG ALIGN=ABSMIDDLE SRC="\images\turpion\approx.gif"> 5 ×10<superscript>13</superscript> W cm<superscript>-2</superscript>). The spectra were recorded with a high spectral and spatial resolution employing spherically bent (focusing) crystals of mica and quartz. An analysis of the experimental data obtained by the irradiation of Al<subscript>2</subscript>O<subscript>3</subscript>-doped agar samples allowed us to determine the main parameters of the plasma produced inside the targets. The ion temperature of plasma in low-density porous targets was estimated for the first time to be 1.5 2 times higher than the electron temperature.

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