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Title: Results of two LANL [beta]=0.175, 350-MHZ, 2-GAP spoke cavities

Abstract

Two {beta} = 0.175, 350 MHz, 2-gap superconducting (SC) spoke cavities were fabricated in industry under the Advanced Accelerator Applications (AAA) project for the transmutation of nuclear waste. These cavities are promising candidates for the accelerating structures between a RFQ and the elliptical SC cavities for proton and heavy ion linacs. Since their delivery in July 2002, they have been tested in terms of mechanical properties, low-temperature performance, i.e., Qo-Eaccc urves at 4 K and 2 K, surface resistance dependence on temperature and for multipacting (MP). The two cavities achieved accelerating fields of 13.5 MV/m and 13.0 MV/m as compared to the required field of 7.5 MV/m with enough margin for the quality factor. These cavities seem to need more time to condition away MP than elliptical cavities, but MP does not occur once the cavity is conditioned and kept at 4 K. The length of the 103 mm-diameter nominal coupler port was found to be too short for the penetrating field.

Authors:
 [1];  [2];  [3];  [4];  [5]; ;  [6];  [7];  [8];  [9]; ; ;
  1. Tsuyoshi
  2. Randall L.
  3. Robert C.
  4. Frank L.
  5. John E.
  6. Debbie I.
  7. Raymond J.(Ray)
  8. Dale L.
  9. Alan H.
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
976645
Report Number(s):
LA-UR-03-3081
TRN: US1006511
Resource Type:
Conference
Resource Relation:
Conference: Submitted to: 2003 Particle Accelerator Conference (PAC2003), Portland, OR, May 12-16, 2003
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 43 PARTICLE ACCELERATORS; ACCELERATORS; CAVITIES; HEAVY IONS; LANL; LINEAR ACCELERATORS; MECHANICAL PROPERTIES; PERFORMANCE; PROTONS; QUALITY FACTOR; RADIOACTIVE WASTES; TRANSMUTATION

Citation Formats

Tajima, T, Edwards, R L, Gentzlinger, R C, Krawczyk, F L, Ledford, J E, Liu, Jianfei, Montoya, D I, Roybal, R J, Schrage, D L, Shapiro, A H, Barni, D, Bosotti, A, and Pagani, C D. Results of two LANL [beta]=0.175, 350-MHZ, 2-GAP spoke cavities. United States: N. p., 2003. Web.
Tajima, T, Edwards, R L, Gentzlinger, R C, Krawczyk, F L, Ledford, J E, Liu, Jianfei, Montoya, D I, Roybal, R J, Schrage, D L, Shapiro, A H, Barni, D, Bosotti, A, & Pagani, C D. Results of two LANL [beta]=0.175, 350-MHZ, 2-GAP spoke cavities. United States.
Tajima, T, Edwards, R L, Gentzlinger, R C, Krawczyk, F L, Ledford, J E, Liu, Jianfei, Montoya, D I, Roybal, R J, Schrage, D L, Shapiro, A H, Barni, D, Bosotti, A, and Pagani, C D. 2003. "Results of two LANL [beta]=0.175, 350-MHZ, 2-GAP spoke cavities". United States. https://www.osti.gov/servlets/purl/976645.
@article{osti_976645,
title = {Results of two LANL [beta]=0.175, 350-MHZ, 2-GAP spoke cavities},
author = {Tajima, T and Edwards, R L and Gentzlinger, R C and Krawczyk, F L and Ledford, J E and Liu, Jianfei and Montoya, D I and Roybal, R J and Schrage, D L and Shapiro, A H and Barni, D and Bosotti, A and Pagani, C D},
abstractNote = {Two {beta} = 0.175, 350 MHz, 2-gap superconducting (SC) spoke cavities were fabricated in industry under the Advanced Accelerator Applications (AAA) project for the transmutation of nuclear waste. These cavities are promising candidates for the accelerating structures between a RFQ and the elliptical SC cavities for proton and heavy ion linacs. Since their delivery in July 2002, they have been tested in terms of mechanical properties, low-temperature performance, i.e., Qo-Eaccc urves at 4 K and 2 K, surface resistance dependence on temperature and for multipacting (MP). The two cavities achieved accelerating fields of 13.5 MV/m and 13.0 MV/m as compared to the required field of 7.5 MV/m with enough margin for the quality factor. These cavities seem to need more time to condition away MP than elliptical cavities, but MP does not occur once the cavity is conditioned and kept at 4 K. The length of the 103 mm-diameter nominal coupler port was found to be too short for the penetrating field.},
doi = {},
url = {https://www.osti.gov/biblio/976645}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 2003},
month = {Wed Jan 01 00:00:00 EST 2003}
}

Conference:
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