A high-resolution, variable-energy electron beam from a Penning–Malmberg (Surko) buffer-gas trap
A high-resolution, variable-energy electron beam from a Penning–Malmberg (Surko) buffer-gas trap
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DOI：
10.1140/epjd/s10053-022-00349-y
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发表时间：
2022-02
期刊：
影响因子：
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通讯作者：
J. Machacek;T. Gay;S. Buckman;S. Hodgman
中科院分区：
文献类型：
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作者：
J. Machacek;T. Gay;S. Buckman;S. Hodgman
我们描述了使用潘宁-马尔姆伯格缓冲气体阱或众所周知的苏尔科阱产生高分辨率电子束。很容易获得能量宽度为 ~ 30 meV (FWHM) 的高通量光束，并且生产效率明显高于类似陷阱配置中的正电子。当人们考虑分子碰撞以及电子和正电子各自的选择规则时，其原因就变得显而易见。我们展示了光束的产生及其实现绝对散射测量和高分辨率电子能谱的能力。图形摘要
We describe the production of a high-resolution electron beam using a Penning–Malmberg buffer-gas trap, or Surko trap as they have become known. A high-flux beam with an energy width of ~ 30 meV (FWHM) is readily achieved and the efficiency of production is considerably higher than that for positrons in a similar trap configuration. The reasons for this become apparent when one considers the molecular collisions and the respective selection rules involved, for electrons and positrons. We demonstrate the production of the beam and the capacity that it realises for absolute scattering measurements and for high-resolution electron spectroscopy.Graphical abstract