Note: O-ring stack system for electron gun alignment

Park, In-Yong; Cho, Boklae; Han, Cheolsu; Shin, Seungmin; Lee, Dongjun

doi:10.1063/1.4905575

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Note: O-ring stack system for electron gun alignment

Park, In-Yong·Cho, Boklae·Han, Cheolsu·Shin, Seungmin·Lee, Dongjun

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Abstract

We present a reliable method for aligning an electron gun which consists of an electron source and lenses by controlling a stack of rubber O-rings in a vacuum condition. The beam direction angle is precisely tilted along two axes by adjusting the height difference of a stack of O-rings. In addition, the source position is shifted in each of three orthogonal directions. We show that the tilting angle and linear shift along the x and y axes as obtained from ten stacked O-rings are ±2.55° and ±2 mm, respectively. This study can easily be adapted to charged particle gun alignment and adjustments of the flange position in a vacuum, ensuring that its results can be useful with regard to electrical insulation between flanges with slight modifications.

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ALIGNMENT BEAMS CHARGED PARTICLES ELECTRICAL INSULATION ELECTRON GUNS ELECTRON SOURCES FLANGES GASKETS RUBBERS

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Park, In-Yong, Cho, Boklae, Han, Cheolsu, Shin, Seungmin, Lee, Dongjun. 2015-01-15. Note: O-ring stack system for electron gun alignment. https://doi.org/10.1063/1.4905575

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