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Dielectric-filled radiofrequency linacs

Abstract

High current, high brightness electron beam accelerators promise to open up dramatic new applications. Linear induction accelerators are currently viewed as the appropriate technology for these applications. A concept by Humphries and Hwang may permit radiofrequency accelerators to fulfill the same functions with greater simplicity and enhanced flexibility. This concept involves the replacement of vacuum rf cavities with dielectric filled ones. Simple analysis indicates that the resonant frequencies are reduced by a factor of ({epsilon}{sub 0}/{epsilon}){sup 1/2} while the stored energy is increased by {epsilon}/{epsilon}{sub 0}. For a high dielectric constant like water, this factor can approach 80. A series of numerical calculations of simple pill-box cavities was performed. Eigenfunctions and resonant frequencies for a full system configuration, including dielectric material, vacuum beamline, and a ceramic window separating the two have been computed. These calculations are compared with the results of a small experimental cavity which have been constructed and operated. Low power tests show excellent agreement. (author). 4 figs., 8 refs.
Authors:
Faehl, R J; Keinigs, R K; Pogue, E W [1] 
  1. Los Alamos National Lab., NM (United States)
Publication Date:
Dec 31, 1996
Product Type:
Conference
Report Number:
INIS-CZ-0002; CONF-960610-
Reference Number:
SCA: 430100; PA: AIX-28:055209; EDB-97:112781; SN: 97001834382
Resource Relation:
Conference: BEAMS `96: 11. international conference on high-power particle beams, Prague (Czech Republic), 10-14 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of Beams `96. Proceedings of the 11th international conference on high power particle beams. Vol. I; Jungwirth, K.; Ullschmied, J. [eds.]; PB: [684] p.
Subject:
43 PARTICLE ACCELERATORS; ACCELERATION; RF SYSTEMS; LINEAR ACCELERATORS; COMPUTERIZED SIMULATION; DIELECTRIC MATERIALS; CAVITY RESONATORS; EIGENFUNCTIONS; ELECTRON BEAMS; ELECTRONS; OSCILLATION MODES
OSTI ID:
510891
Research Organizations:
Ceskoslovenska Akademie Ved, Prague (Czech Republic). Ustav Fyziky Plazmatu
Country of Origin:
Czech Republic
Language:
English
Other Identifying Numbers:
Other: ON: DE97637662; ISBN 80-902250-3-9; TRN: CZ9726791055209
Availability:
INIS; OSTI as DE97637662
Submitting Site:
INIS
Size:
pp. 636-639
Announcement Date:

Citation Formats

Faehl, R J, Keinigs, R K, and Pogue, E W. Dielectric-filled radiofrequency linacs. Czech Republic: N. p., 1996. Web.
Faehl, R J, Keinigs, R K, & Pogue, E W. Dielectric-filled radiofrequency linacs. Czech Republic.
Faehl, R J, Keinigs, R K, and Pogue, E W. 1996. "Dielectric-filled radiofrequency linacs." Czech Republic.
@misc{etde_510891,
title = {Dielectric-filled radiofrequency linacs}
author = {Faehl, R J, Keinigs, R K, and Pogue, E W}
abstractNote = {High current, high brightness electron beam accelerators promise to open up dramatic new applications. Linear induction accelerators are currently viewed as the appropriate technology for these applications. A concept by Humphries and Hwang may permit radiofrequency accelerators to fulfill the same functions with greater simplicity and enhanced flexibility. This concept involves the replacement of vacuum rf cavities with dielectric filled ones. Simple analysis indicates that the resonant frequencies are reduced by a factor of ({epsilon}{sub 0}/{epsilon}){sup 1/2} while the stored energy is increased by {epsilon}/{epsilon}{sub 0}. For a high dielectric constant like water, this factor can approach 80. A series of numerical calculations of simple pill-box cavities was performed. Eigenfunctions and resonant frequencies for a full system configuration, including dielectric material, vacuum beamline, and a ceramic window separating the two have been computed. These calculations are compared with the results of a small experimental cavity which have been constructed and operated. Low power tests show excellent agreement. (author). 4 figs., 8 refs.}
place = {Czech Republic}
year = {1996}
month = {Dec}
}