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@inproceedings{ezawa:ipac2021-wepab106,
author = {K. Ezawa and R. Fukuoka and Y. Koshiba and K. Sakaue and T. Tamba and M. Washio},
title = {{Study on Durability Improvement of Cs-Te Photocathode by Means of Alkali Halide Protective Films}},
booktitle = {Proc. IPAC'21},
pages = {2847--2849},
eid = {WEPAB106},
language = {english},
keywords = {cathode, electron, experiment, ECR, laser},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-WEPAB106},
url = {https://jacow.org/ipac2021/papers/wepab106.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB106},
abstract = {{We have been conducting basic and applied research for generating high quality electron beams, using 1.6 cell laser photocathode RF-gun. In our laboratory, Cesium Telluride (Cs-Te), one of the semiconductor photocathodes, is used as an electron source for accelerator experiments. This semiconductor photocathode is known for high quantum efficiency (Q.E.) about 5~10% and 3-month 1/e lifetime. High Q.E. photocathodes can reduce the power requirement of the laser system, and long lifetime photocathodes can decrease the maintenance frequency, contributing to an efficient experimental environment. For these reasons, high Q.E. and long lifetime photocathodes are necessary in accelerator experiments. In order to produce robust photocathodes and extend the lifetime, we have conducted covering Cs-Te photocathodes with CsBr and CsI protective films. In this conference, we report the thickness dependency on the lifetime of Cs-Te photocathodes when we intentionally exposed oxygen gas to coated and non-coated Cs-Te photocathodes.}},
}