Optimizing Activation Recipe with Cs, Te, O for GaAs-Based Photocathodes
| Autor: | Bae, Jai Kwan, Andorf, Matthew, Bazarov, Ivan, Cultrera, Luca, Galdi, Alice, Maxson, Jared |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| DOI: | 10.18429/jacow-ipac2022-mopoms004 |
| Popis: | GaAs-based photocathodes are the most popular electron sources for producing highly spin-polarized electron beams in accelerator physics and condensed matter physics. Spin-polarized photoemission requires activation to achieve Negative Electron Affinity (NEA). Conventional NEA surfaces such as CS-O/NF3 are extremely vacuum sensitive, and this results in rapid QE degradation. In this work, we activated GaAs with various recipes using Cs, Te, and oxygen. We demonstrate NEA activation on GaAs surfaces. Among Cs-Te activated samples, the oxidized sample showed the highest QE and longest lifetime at 780 nm. Proceedings of the 13th International Particle Accelerator Conference, IPAC2022, Bangkok, Thailand |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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