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Title: Superconducting 112 MHz QWR electron gun

Abstract

Brookhaven National Laboratory and Niowave, Inc. have designed and fabricated a superconducting 112 MHz quarter-wave resonator (QWR) electron gun. The first cold test of the QWR cryomodule has been completed at Niowave. The paper describes the cryomodule design, presents the cold test results, and outline plans to upgrade the cryomodule. Future experiments include studies of different photocathodes and use for the coherent electron cooling proof-of-principle experiment. Two cathode stalk options, one for multi-alkali photocathodes and the other one for a diamond-amplified photocathode, are discussed. A quarter-wave resonator concept of superconducting RF (SRF) electron gun was proposed at BNL for electron cooling hadron beams in RHIC. QWRs can be made sufficiently compact even at low RF frequencies (long wavelengths). The long wavelength allows to produce long electron bunches, thus minimizing space charge effects and enabling high bunch charge. Also, such guns should be suitable for experiments requiring high average current electron beams. A 112 MHz QWR gun was designed, fabricated, and cold-tested in collaboration between BNL and Niowave. This is the lowest frequency SRF gun ever tested successfully. In this paper we describe the gun design and fabrication, present the cold test results, and outline our plans. This gun will alsomore » serve as a prototype for a future SRF gun to be used for coherent electron cooling of hadrons in eRHIC.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
BROOKHAVEN NATIONAL LABORATORY (BNL)
Sponsoring Org.:
DOE - OFFICE OF SCIENCE
OSTI Identifier:
1025504
Report Number(s):
BNL-95225-2011-CP
R&D Project: KBCH139; 18054; KB0202011; TRN: US1104918
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: 15th International Conference on RF Superconductivity (SRF2011); Chicago, IL; 20110725 through 20110729
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BNL; CATHODES; DESIGN; ELECTRON BEAMS; ELECTRON COOLING; ELECTRON GUNS; ELECTRONS; FABRICATION; HADRONS; PHOTOCATHODES; RESONATORS; SPACE CHARGE; SUPERCONDUCTIVITY; WAVELENGTHS

Citation Formats

Belomestnykh, S., Ben-Zvi, I., Boulware, C.H., Chang, X., Grimm, T.L., Rao, T., Siegel, B., Skaritka, J., Than, R., Winowski, M., Wu, Q., Xin, T., and Xue, L.. Superconducting 112 MHz QWR electron gun. United States: N. p., 2011. Web.
Belomestnykh, S., Ben-Zvi, I., Boulware, C.H., Chang, X., Grimm, T.L., Rao, T., Siegel, B., Skaritka, J., Than, R., Winowski, M., Wu, Q., Xin, T., & Xue, L.. Superconducting 112 MHz QWR electron gun. United States.
Belomestnykh, S., Ben-Zvi, I., Boulware, C.H., Chang, X., Grimm, T.L., Rao, T., Siegel, B., Skaritka, J., Than, R., Winowski, M., Wu, Q., Xin, T., and Xue, L.. Mon . "Superconducting 112 MHz QWR electron gun". United States. https://www.osti.gov/servlets/purl/1025504.
@article{osti_1025504,
title = {Superconducting 112 MHz QWR electron gun},
author = {Belomestnykh, S. and Ben-Zvi, I. and Boulware, C.H. and Chang, X. and Grimm, T.L. and Rao, T. and Siegel, B. and Skaritka, J. and Than, R. and Winowski, M. and Wu, Q. and Xin, T. and Xue, L.},
abstractNote = {Brookhaven National Laboratory and Niowave, Inc. have designed and fabricated a superconducting 112 MHz quarter-wave resonator (QWR) electron gun. The first cold test of the QWR cryomodule has been completed at Niowave. The paper describes the cryomodule design, presents the cold test results, and outline plans to upgrade the cryomodule. Future experiments include studies of different photocathodes and use for the coherent electron cooling proof-of-principle experiment. Two cathode stalk options, one for multi-alkali photocathodes and the other one for a diamond-amplified photocathode, are discussed. A quarter-wave resonator concept of superconducting RF (SRF) electron gun was proposed at BNL for electron cooling hadron beams in RHIC. QWRs can be made sufficiently compact even at low RF frequencies (long wavelengths). The long wavelength allows to produce long electron bunches, thus minimizing space charge effects and enabling high bunch charge. Also, such guns should be suitable for experiments requiring high average current electron beams. A 112 MHz QWR gun was designed, fabricated, and cold-tested in collaboration between BNL and Niowave. This is the lowest frequency SRF gun ever tested successfully. In this paper we describe the gun design and fabrication, present the cold test results, and outline our plans. This gun will also serve as a prototype for a future SRF gun to be used for coherent electron cooling of hadrons in eRHIC.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {7}
}

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