Research Papers in Physics and Astronomy


Date of this Version

October 1999


Published in REVIEW OF SCIENTIFIC INSTRUMENTS, VOLUME 70, NUMBER 10, OCTOBER 1999. Copyright © 1999 American Institute of Physics. Used by permission.


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.

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