Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 9th International Particle Accelerator Conference



Conference Name

9th International Particle Accelerator Conference, April 29-May 4, 2018, Vancouver, Canada


A compact DC high voltage photogun with inverted-insulator geometry was designed, built and operated reliably at 300 kV bias voltage using alkali-antimonide photocathodes. This presentation describes key electrostatic design features of the photogun with accompanying emittance measurements obtained across the entire photocathode surface that speak to field non-uniformity within the cathode/anode gap. A summary of initial photocathode lifetime measurements at beam currents up to 4.5 mA is also presented.


Copyright © 2018 by JACoW

Published under a Creative Commons Attribution 3.0 Unported (CC BY 3.0) License.

Original Publication Citation

Wang, Y. W., Adderley, P. A., Benesch, J. F., Bullard, D. B., Grames, J. M., Hannon, F. E., Hansknecht, J., Hernandez-Garcia, C., Kazimi, R., Krafft, G. A., Mamun, M. A., Palacios-Seranno, G. G., Poelker, M., Suleiman, R., Tiefenback, M. G., Wijethunga, S. A. K., & Zhang, S. (2018). 300 kV DC high voltage photogun with inverted insulator geometry and CsK₂sb photocathode. In S. Koscielniak, T. Satogata, V.R.W. Schat, J. Thomson (Eds.), Proceedings of the 9th International Particle Accelerator Conference (pp. 4571-4574). JACoW.


0000-0002-0328-5828 (Krafft)