关于磁场中带电粒子径向分布的几点评论
Comments on the radial distribution of charged particles in a magnetic field
摘要：
磁引导场与能量色散半导体探测器的结合已经在50多年前被用于束内转换电子能谱。即使在那时，人们也认识到，当电子撞击挡板或错过检测器的敏感区域时，效率调制可能会出现作为电子能量的函数。目前高精度的极化中子β衰变实验的概念相似的实验装置，导致详细的研究点扩散函数（PSF）。后者描述了单能电子在探测器平面上的径向概率分布。奇异性作为径向探测器坐标的函数发生，Sjue等人对此进行了研究和讨论。Instr. 86，023102（2015））和Dubbers（arXiv：1501.05131v1 [physics.ins-det]）。在这篇评论中，一个相当精确的数值表示的PSF的，并在上述文件中的近似比较。
英文摘要：
Magnetic guiding fields in combination with energy dispersive semiconductor detectors have been employed already more than 50 years ago for in-beam internal conversion electron spectroscopy. Even then it was recognized that efficiency modulations may appear as function of the electron energy, arising when electrons hit a baffle or miss the sensitive area of the detector. Current high precision beta decay experiments of polarized neutrons with conceptional similar experimental devices resulted in a detailed study of the point spread function (PSF). The latter describes the radial probability distribution of mono-energetic electrons at the detector plane. Singularities occur as function of the radial detector coordinate which have been investigated and discussed by Sjue at al. (Rev. Scient. Instr. 86, 023102 (2015)), and Dubbers (arXiv:1501.05131v1 [physics.ins-det]). In this comment a rather precise numerical representation of the PSF is presented and compared with approximations in the mentioned papers.
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