| Title |
Enhanced Robustness of GaAs-Based Photocathodes Activation by Cs, Sb, and O2 |
| Authors |
- J. Bae, L. Cultrera, A. Galdi, F. Ikponmwen
Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
- I.V. Bazarov, J.M. Maxson
Cornell University, Ithaca, New York, USA
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| Abstract |
Operational lifetime of GaAs photocathodes is the primary limit for applications as high current spin polarized electron sources in future nuclear physics facilities, such as Electron Ion Collider. Recently, ultrathin Cs₂Te on GaAs has shown a successful negative electron affinity (NEA) activation with an improved lifetime by a factor of 5 *. In this work, we report activation of GaAs with Cs, Sb and oxygen. Four different methods of introducing oxygen during the growth was investigated. Cs-Sb-O activated GaAs has shown up to a factor of 40 and 13 improvement in charge extraction lifetime and dark lifetime, respectively.
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| Footnotes & References |
* Bae, et al. (2018). Rugged spin-polarized electron sources based on negative electron affinity GaAs photocathode with robust Cs2Te coating. Applied Physics Letters, 112(15), 154101. |
| Funding |
This work is funded by Department of Energy: DE-SC0016203. |
| Paper |
download MOPLH17.PDF [0.318 MB / 3 pages] |
| Poster |
download MOPLH17_POSTER.PDF [0.926 MB] |
| Export |
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| Conference |
NAPAC2019 |
| Series |
North American Particle Accelerator Conference (4th) |
| Location |
Lansing, MI, USA |
| Date |
01-06 September 2019 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Yoshishige Yamazaki (MSU, East-Lansing, MI, USA); Tor Raubenheimer (SLAC, Stanford, CA, USA); Amy McCausey (FRIB, East-Lansing, MI, USA); Volker RW Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-223-3 |
| Online ISSN |
2673-7000 |
| Received |
28 August 2019 |
| Accepted |
01 September 2019 |
| Issue Date |
08 October 2019 |
| DOI |
doi:10.18429/JACoW-NAPAC2019-MOPLH17 |
| Pages |
210-212 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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