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

Abstract

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. The results of those tests showed that breakdown voltage was increased using triple-point shielding electrodes and bulk-doped insulators that allow charge drainage. Furthermore, this contribution describes ongoing work to develop a robust insulator- cable connector for reliably applying 500 kV dc to a future polarized beam photogun operating at 350 kV without field emission.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]
+ Show Author Affiliations
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Old Dominion Univ., Norfolk, VA (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1885536
Report Number(s):
JLAB-ACC-21-3490; DOE/OR/23177-5309
Journal ID: ISSN 2576-2397
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
Annual report - Conference on Electrical Insulation and Dielectric Phenomena (Online)
Additional Journal Information:
Journal Name: Annual report - Conference on Electrical Insulation and Dielectric Phenomena (Online); Journal Volume: 2021; Conference: 2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Vancouver, BC (Canada), 12-15 Dec 2021; Journal ID: ISSN 2576-2397
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Hernandez-Garcia, C., Palacios-Serrano, G., Adderley, P., Bullard, D., Grames, J., Mamun, M. A., Poelker, M., Stutzman, M., Suleiman, R., Wang, Y., and Wijethunga, S. A. K. Inverted Geometry Ceramic Insulators in High Voltage DC Electron Guns for Accelerators. United States: N. p., 2021. Web. doi:10.1109/ceidp50766.2021.9705333.
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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. Inverted Geometry Ceramic Insulators in High Voltage DC Electron Guns for Accelerators. United States. https://doi.org/10.1109/ceidp50766.2021.9705333
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Hernandez-Garcia, C., Palacios-Serrano, G., Adderley, P., Bullard, D., Grames, J., Mamun, M. A., Poelker, M., Stutzman, M., Suleiman, R., Wang, Y., and Wijethunga, S. A. K. Sun . "Inverted Geometry Ceramic Insulators in High Voltage DC Electron Guns for Accelerators". United States. https://doi.org/10.1109/ceidp50766.2021.9705333. https://www.osti.gov/servlets/purl/1885536.
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@article{osti_1885536,
title = {Inverted Geometry Ceramic Insulators in High Voltage DC Electron Guns for Accelerators},
author = {Hernandez-Garcia, C. and Palacios-Serrano, G. and Adderley, P. and Bullard, D. and Grames, J. and Mamun, M. A. and Poelker, M. and Stutzman, M. and Suleiman, R. and Wang, Y. and Wijethunga, S. A. K.},
abstractNote = {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. The results of those tests showed that breakdown voltage was increased using triple-point shielding electrodes and bulk-doped insulators that allow charge drainage. Furthermore, this contribution describes ongoing work to develop a robust insulator- cable connector for reliably applying 500 kV dc to a future polarized beam photogun operating at 350 kV without field emission.},
doi = {10.1109/ceidp50766.2021.9705333},
journal = {Annual report - Conference on Electrical Insulation and Dielectric Phenomena (Online)},
number = ,
volume = 2021,
place = {United States},
year = {Sun Dec 12 00:00:00 EST 2021},
month = {Sun Dec 12 00:00:00 EST 2021}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1109/ceidp50766.2021.9705333
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