Speaker
Matthew Andorf
(Cornell University (CLASSE))
Description
Negative Electron Affinity (NEA) GaAs is presently the most viable option for the production of a spin-polarized electron beam at high average current (> 1 mA). To bring GaAs to an NEA state, typically a mono-layer of Cs and Oxygen are deposited onto the cathodes surface. While this results in a high Quantum Efficiency (QE), the activation layer is extremely fragile resulting in a short operational lifetime. Alternative activation recipes that include the use of Sb have demonstrated improved robustness from vacuum poisoning. In this proceeding we present charge lifetime measurements of Cs-Sb-O while operated inside a 200 keV DC gun at an average current of 1 mA.
Funding Agency
DOE DE-SC0023517
| Region represented | America |
|---|---|
| Paper preparation format | LaTeX |
Author
Matthew Andorf
(Cornell University (CLASSE))
Co-authors
Ivan Bazarov
(Cornell University (CLASSE))
Jared Maxson
(Cornell University)
Adam Bartnik
(Cornell University (CLASSE))
Benjamin Dickensheets
(Cornell University)
Samuel Levenson
(Cornell University (CLASSE))
