A simplified GaAs polarized electron source

We report operational and construction details of a simplified GaAs polarized electron source. It is contained in a modified 4.63 in. Conflat four-way cross, and uses a single 56 l/s turbomolecular pump. The design incorporates multiple cesiators to extend source lifetime, a new spring-clamp GaAs cr...

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Bibliographic Details
Published in:Review of scientific instruments 1999-10, Vol.70 (10), p.3882-3885
Main Authors: Al-Khateeb, H. M., Birdsey, B. G., Bowen, T. C., Green, A. S., Johnston, M. E., Gay, T. J.
Format: Article
Language:English
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Summary:We report operational and construction details of a simplified GaAs polarized electron source. It is contained in a modified 4.63 in. Conflat four-way cross, and uses a single 56 l/s turbomolecular pump. The design incorporates multiple cesiators to extend source lifetime, a new spring-clamp GaAs crystal mounting design to provide uniform crystal heating, and a very simple tubular 90° electrostatic deflector. We also discuss matters related to preparing, heat cleaning, and activating the GaAs crystal.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1150006