| Title |
New Results at JLab Describing Operating Lifetime of GaAs Photo-guns |
| Authors |
- M.W. Bruker, J.M. Grames, C. Hernandez-Garcia, M. Poelker, S. Zhang
JLab, Newport News, Virginia, USA
- V.M. Lizárraga-Rubio, C.A. Valerio-Lizárraga
ECFM-UAS, Culiacan, Sinaloa, Mexico
- J.T. Yoskowitz
ODU, Norfolk, Virginia, USA
|
| Abstract |
Polarized electrons from GaAs photocathodes have been key to some of the highest-impact results of the Jefferson Lab science program over the past 30 years. During this time, various studies have given insight into improving the operational lifetime of these photocathodes in DC high-voltage photo-guns while using lasers with spatial Gaussian profiles of typically 0.5 mm to 1 mm FWHM, cathode voltages of 100 kV to 130 kV, and a wide range of beam currents up to multiple mA. In this contribution, we show recent experimental data from a 100 kV to 180 kV setup and describe our progress at predicting the lifetime based on the calculable dynamics of ionized gas molecules inside the gun. These new experimental studies at Jefferson Lab are specifically aimed at exploring the ion damage of higher-voltage guns being built for injectors.
|
| Funding |
This work is supported by U.S. Department of Energy under DE-AC05-06OR23177 and by Consejo Nacional de Ciencia y Tecnología and the Universidad Autonoma de Sinaloa under PRO_A1_022. |
| Paper |
download WEPA13.PDF [0.209 MB / 4 pages] |
| Poster |
download WEPA13_POSTER.PDF [1.673 MB] |
| Cite |
download ※ BibTeX
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※ EndNote |
| Conference |
NAPAC2022 |
| Series |
International Particle Accelerator Conference (5th) |
| Location |
Albuquerque, NM, USA |
| Date |
07-12 August 2022 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Sandra Biedron (Element Aero, Chicago, IL, USA); Evgenya Simakov (LANL, Los Alamos, NM, USA); Stephen Milton (Element Aero, Chicago, IL, USA); Petr M. Anisimov (LANL, Los Alamos, NM, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-232-5 |
| Online ISSN |
2673-7000 |
| Received |
02 August 2022 |
| Revised |
07 August 2022 |
| Accepted |
11 August 2022 |
| Issue Date |
01 October 2022 |
| DOI |
doi:10.18429/JACoW-NAPAC2022-WEPA13 |
| Pages |
644-647 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 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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