Radiative heating of thin Al foils by intense extreme ultraviolet radiation
Jetp Letters(2016)
摘要
The effect of induced transparency of thin Al foils radiatively heated by intense extreme ultraviolet (EVU) radiation has been observed. The radiation of the plasma of Z-pinches appearing under the compression of tungsten liners at the Angara-5-1 facility has been used as the radiation that heats the Al foil (peak illumination on the foil ~0.55 TW/cm 2 ) and is transmitted through it. The photoabsorption has been studied in the formed aluminum plasma at temperatures of ~10–30 eV in the density range of ~1–20 mg/cm 3 in the wavelength range of ~5–24 nm. Absorption lines of Al 4+...7+ ions have been identified in the experimental spectrum. In addition, radiative gas-dynamic simulations of the foil heating and expansion have been performed taking into account radiation transfer processes.
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关键词
JETP Letter, Pinhole Camera, Heated Foil, Laser Shadow, State Atomic Energy Corporation ROSATOM
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