Document Type

Article

Publication Date

2019

DOI

10.1103/PhysRevAccelBeams.22.113401

Publication Title

Physical Review Accelerators and Beams

Volume

22

Issue

11

Pages

1-15

Abstract

This contribution describes the latest milestones of a multiyear program to build and operate a compact −300  kV dc high voltage photogun with inverted insulator geometry and alkali-antimonide photocathodes. Photocathode thermal emittance measurements and quantum efficiency charge lifetime measurements at average current up to 4.5 mA are presented, as well as an innovative implementation of ion generation and tracking simulations to explain the benefits of a biased anode to repel beam line ions from the anode-cathode gap, to dramatically improve the operating lifetime of the photogun and eliminate the occurrence of micro-arc discharges.

Comments

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the authors and the published article’s title, journal citation, and DOI.

Publisher's version available at: https://doi.org/10.1103/PhysRevAccelBeams.22.113401

Original Publication Citation

Hernandez-Garcia, C., Adderley, P., Bullard, B., ... Valerio Lizarraga, C. A., Montoya Soto, R., & Canales Ramos, A. (2019). Compact -300 kV dc inverted insulator photogun with biased anode and alkali-antimonide photocathode. Physical Review Accelerators and Beams, 22(11), 1-15, Article 113401. https://doi.org/10.1103/PhysRevAccelBeams.22.113401

ORCID

0000-0002-5331-6127 (Palacios-Serrano), 0000-0003-1792-6603 (Yoskowitz)

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