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Coupled superconducting resonant cavities for a heavy ion linac

Abstract

A design for a superconducting niobium slow-wave accelerating structure has been explored that may have performance and cost advantages over existing technology. The option considered is an array of pairs of quarter-wave coaxial-line resonant cavities, the two elements of each pair strongly coupled through a short superconducting transmission line. In the linac formed by such an array, each paired structure is independently phased. A disadvantage of two-gap slow wave structures is that each cavity is relatively short, so that a large number of independently-phased elements is required for a linac. Increasing the number of drift tubes per cavity reduces the number of independently-phased elements but at the cost of reducing the range of useful velocity acceptance for each element. Coupling two cavities splits the accelerating rf eigenmode into two resonant modes each of which covers a portion of the full velocity acceptance range of the original, single cavity mode. Using both of these resonant modes makes feasible the use of coupled cavity pairs for a linac with little loss in velocity acceptance. (Author) 2 figs., 8 refs.
Authors:
Shepard, K W; [1]  Roy, A [2] 
  1. Argonne National Lab., IL (United States)
  2. Nuclear Science Center, New Delhi (India)
Publication Date:
Nov 01, 1992
Product Type:
Conference
Report Number:
AECL-10728(Vol.1,2); CONF-9208109-
Reference Number:
SCA: 430100; PA: AIX-28:053405; EDB-97:100318; SN: 97001824000
Resource Relation:
Conference: 16. international LINAC conference, Ottawa (Canada), 23-28 Aug 1992; Other Information: PBD: Nov 1992; Related Information: Is Part Of Proceedings of the 1992 linear accelerator conference; Hoffmann, C.R. [ed.]; PB: 949 p.
Subject:
43 PARTICLE ACCELERATORS; LINEAR ACCELERATORS; SUPERCONDUCTING CAVITY RESONATORS; DRIFT TUBES; SPECIFICATIONS; SUPERCONDUCTING CABLES
OSTI ID:
503104
Research Organizations:
Atomic Energy of Canada Ltd., Chalk River, ON (Canada). Chalk River Nuclear Labs.
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
Other: ON: DE97636647; TRN: CA9700177053405
Availability:
INIS; OSTI as DE97636647
Submitting Site:
INIS
Size:
pp. 425-427
Announcement Date:

Citation Formats

Shepard, K W, and Roy, A. Coupled superconducting resonant cavities for a heavy ion linac. Canada: N. p., 1992. Web.
Shepard, K W, & Roy, A. Coupled superconducting resonant cavities for a heavy ion linac. Canada.
Shepard, K W, and Roy, A. 1992. "Coupled superconducting resonant cavities for a heavy ion linac." Canada.
@misc{etde_503104,
title = {Coupled superconducting resonant cavities for a heavy ion linac}
author = {Shepard, K W, and Roy, A}
abstractNote = {A design for a superconducting niobium slow-wave accelerating structure has been explored that may have performance and cost advantages over existing technology. The option considered is an array of pairs of quarter-wave coaxial-line resonant cavities, the two elements of each pair strongly coupled through a short superconducting transmission line. In the linac formed by such an array, each paired structure is independently phased. A disadvantage of two-gap slow wave structures is that each cavity is relatively short, so that a large number of independently-phased elements is required for a linac. Increasing the number of drift tubes per cavity reduces the number of independently-phased elements but at the cost of reducing the range of useful velocity acceptance for each element. Coupling two cavities splits the accelerating rf eigenmode into two resonant modes each of which covers a portion of the full velocity acceptance range of the original, single cavity mode. Using both of these resonant modes makes feasible the use of coupled cavity pairs for a linac with little loss in velocity acceptance. (Author) 2 figs., 8 refs.}
place = {Canada}
year = {1992}
month = {Nov}
}