Inverted Geometry Ceramic Insulators in High Voltage DC Electron Guns for Accelerators

Hernandez-Garcia, C.; Palacios-Serrano, G.; Adderley, P.; Bullard, D.; Grames, J.; Mamun, M. A.; Poelker, M.; Stutzman, M.; Suleiman, R.; Wang, Y.; Wijethunga, S. A.K.

doi:10.1109/ceidp50766.2021.9705333

Inverted Geometry Ceramic Insulators in High Voltage DC Electron Guns for Accelerators

Conference · Sun Dec 12 04:00:00 EST 2021

DOI:https://doi.org/10.1109/ceidp50766.2021.9705333· OSTI ID:1973483

Hernandez-Garcia, C. ^[1]; Palacios-Serrano, G. ^[1]; Adderley, P. ^[1]; Bullard, D. ^[1]; Grames, J. ^[1]; Mamun, M. A. ^[1]; Poelker, M. ^[1]; Stutzman, M. ^[1]; Suleiman, R. ^[1]; Wang, Y. ^[1]; Wijethunga, S. A.K. ^[1]

Thomas Jefferson National Accelerator Facility Newport News,VA,USA,23606

A direct current (dc) high voltage photo-emission electron gun operating at 130 kV is utilized at the Jefferson Lab (JLab) Continuous Electron Beam Accelerator Facility to generate spin-polarized electrons for nuclear physics experiments. Over the past decade, JLab has tested and implemented inverted-geometry ceramic insulators in photoguns, connecting the cathode electrode in vacuum to the high voltage power supply using commercial high voltage cables. This contribution reports on tests performed up to 375 kV dc, implementation of inverted insulators in a 300 kV dc photogun generating magnetized electron beams, and describes plans to develop a reliable insulator-cable connector for applying 500 kV dc to a future polarized beam photogun operating reliably and without field emission at 350 kV.

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Research Organization:: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: U.S. Department of Energy; USDOE Office of Science (SC), Nuclear Physics (NP)

DOE Contract Number:: AC05-06OR23177

OSTI ID:: 1973483

Report Number(s):: JLAB-ACC-21-3460; DOE/OR/23177-5273

Country of Publication:: United States

Language:: English

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