Generation of thermal x-ray radiation in high-Z cavities using high-power glass laser beam

Y. Prasad, A. Joshi, V. Senecha, M. P. Kamath, P. Khare, H. C. Pant
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引用次数: 1

Abstract

Thermal x-ray radiation was generated and confined inside a spherical gold cavity of 1.2 mm diameter that was heated by a 50 J/1 ns laser pulse at 1.053 μm wavelength. The laser intensity on the inner surface of the cavity was ~5x1013 W/cm2. The x-ray spectra recorded on high sensitivity x-ray film using a transmission grating spectrometer (TGS) positioned normal to the laser beam direction were analyzed to obtain the radiation temperature of the cavity. The unfolded x-ray spectra from the cavity have most of the emission between 15 - 60 Å with peak emission at 20 - 35 Å. The Planckian spectral fit to the x-ray spectra suggests a peak blackbody temperature of 90 eV inside the cavity.
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利用高功率玻璃激光束在高z腔中产生热x射线辐射
用波长为1.053 μm、波长为50 J/1 ns的激光加热直径为1.2 mm的球形金腔,产生热x射线。腔体内表面的激光强度为~5 × 1013 W/cm2。利用垂直于激光束方向的透射光栅光谱仪(TGS)对高灵敏度x射线薄膜上记录的x射线光谱进行分析,得到了腔体的辐射温度。从空腔中展开的x射线光谱大部分在15 - 60 Å之间,峰值在20 - 35 Å之间。普朗克谱与x射线谱的拟合表明,腔内黑体温度峰值为90ev。
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