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Characteristics of a multi-keV monochromatic point x-ray source based on vacuum diode with laser-produced plasma as cathode

机译:基于真空二极管的多keV单色点X射线源的特性,激光产生等离子体为阴极

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摘要

Temporal, spatial and spectral characteristics of a multi-keV monochromatic point x-ray source based on vacuum diode with laser-produced plasma as cathode are presented. Electrons from a laser-produced aluminium plasma were accelerated towards a conical point tip titanium anode to generate K-shell x-ray radiation. Approximately 10~(10) photons/pulse were generated in x-ray pulses of ~18 to ~28 ns duration from a source of ~300 μm diameter, at hv = 4.51 keV (K_α emission of titanium), with a brightness of ~10~(20) photons/cm~2/s/sr. This was sufficient to record single-shot x-ray radiographs of physical objects on a DEF-5 x-ray film kept at a distance of up to ~10 cm.
机译:提出了基于真空二极管的多keV单色点X射线源的时间,空间和光谱特性,其中激光产生的等离子体为阴极。来自激光产生的铝等离子体的电子朝锥形尖端钛阳极加速,以产生K壳X射线辐射。直径为〜300μm的光源在hv = 4.51 keV(钛的K_α发射)下,在〜18到〜28 ns的持续时间的〜18 ns至〜28 ns的x射线脉冲中产生约10〜(10)个光子/脉冲。 10〜(20)光子/ cm〜2 / s / sr。这足以在距离约10 cm的DEF-5 X射线胶片上记录物理对象的单次X射线射线照相。

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