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@InProceedings{bae:napac2019-moplh17,
author = {J. Bae and I.V. Bazarov and L. Cultrera and A. Galdi and F. Ikponmwen and J.M. Maxson},
title = {{Enhanced Robustness of GaAs-Based Photocathodes Activation by Cs, Sb, and O2}},
booktitle = {Proc. NAPAC'19},
pages = {210--212},
paper = {MOPLH17},
language = {english},
keywords = {electron, cathode, polarization, vacuum, extraction},
venue = {Lansing, MI, USA},
series = {North American Particle Accelerator Conference},
number = {4},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2019},
issn = {2673-7000},
isbn = {978-3-95450-223-3},
doi = {10.18429/JACoW-NAPAC2019-MOPLH17},
url = {http://jacow.org/napac2019/papers/moplh17.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-MOPLH17},
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.},
}