用于低能等离子体仪器校准的紫外受激电子源
Ultraviolet stimulated electron source for use with low energy plasma instrument calibration
摘要：
我们已经开发并展示了一种多功能的紧凑型电子源，该电子源可以产生直径高达50 mm的单能电子束，能量范围为0.1至30 keV，能量扩展<10 eV。通过用单个近紫外（UV）发光二极管（LED）照射金属阴极板，可以产生在1cm 2上具有15%变化的空间均匀的电子束。阴极表面前面的均匀电场将电子加速成在1 keV下具有<1度角发散的束。束流强度可以从10^9电子/cm 2s控制。
英文摘要：
We have developed and demonstrated a versatile, compact electron source that can produce a monoenergetic electron beam up to 50 mm diameter from 0.1 to 30 keV with an energy spread of <10 eV. By illuminating a metal cathode plate with a single near ultraviolet (UV) light emitting diode (LED), a spatially uniform electron beam with 15% variation over 1 cm2 can be generated. A uniform electric field in front of the cathode surface accelerates the electrons into a beam with an angular divergence of <1 degree at 1 keV. The beam intensity can be controlled from 10^9 electrons/cm2s.
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