Abstract

The use of field emission cathodes in X-ray tubes requires the placement of the cathode assembly with a small gap from the anode, and this hampers the output of radiation. The greatest difficulties arise in the generation of a relatively soft spectrum with wavelengths of 1–10 nm: in this case, the accelerating voltage does not exceed several kilovolts and the interelectrode gap does not exceed several hundred microns. In this work, the possibility of using submicron films based on beryllium as through-type anodes for emitting the BeK_α line (λ = 11.4 nm) and the accompanying bremsstrahlung spectrum is experimentally demonstrated. In particular, the characteristic radiation of a tube with a field emission blade-type cathode and a Be-film anode, introduced into a grazing incidence grating spectrometer, was detected. The characteristics of beryllium films necessary for designing high-power X-ray tubes of this type are determined.

中文翻译：

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在软X射线辐射范围内使用具有场发射阴极和直通型阳极的X射线管的前景

摘要

在X射线管中使用场发射阴极需要将阴极组件放置在与阳极相距很小的间隙的位置，这会阻碍辐射的输出。最大的困难在于产生波长为1-10 nm的相对较软的光谱：在这种情况下，加速电压不超过几千伏，电极间间隙不超过几百微米。在这项工作中，基于使用铍薄膜亚微米的可能性作为贯通型阳极用于发射要ķ _α线（λ= 11.4 nm）和伴随的致辐射光谱通过实验证明。特别地，检测到引入到掠入射光栅光谱仪中的具有场致发射叶片型阴极和Be膜阳极的管的特征辐射。确定了设计这种大功率X射线管所需的铍膜的特性。