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Title: Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system

Abstract

Crab crossing is essential for high-luminosity colliders. The high-luminosity Large Hadron Collider (HL-LHC) will equip one of its interaction points (IP1) with double-quarter wave (DQW) crab cavities. A DQW cavity is a new generation of deflecting rf cavities that stands out for its compactness and broad frequency separation between fundamental and first high-order modes. The deflecting kick is provided by its fundamental mode. Each HL-LHC DQW cavity shall provide a nominal deflecting voltage of 3.4 MV, although up to 5.0 MV may be required. A proof-of-principle (POP) DQW cavity was limited by quench at 4.6 MV. This paper describes a new, highly optimized cavity, designated the DQW SPS series, which satisfies dimensional, cryogenic, manufacturing, and impedance requirements for beam tests at the Super Proton Synchrotron (SPS) and operation in the LHC. Two prototypes of this DQW SPS series were fabricated by U.S. industry and cold tested after following a conventional superconducting radio-frequency surface treatment. Both units outperformed the POP cavity, reaching a deflecting voltage of 5.3-5.9 MV. This voltage - the highest reached by a DQW cavity - is well beyond the nominal voltage of 3.4 MV and may even operate at the ultimate voltage of 5.0 MV with amore » sufficient margin. This paper covers fabrication, surface preparation, and cryogenic rf test results and implications.« less

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP); U.S. LHC Accelerator Research Program (LARP); European Union (EU); Small Business Innovation Research (SBIR) program
Contributing Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); NIOWAVE Inc., Lansing, MI (United States); CERN
OSTI Identifier:
1464300
Alternate Identifier(s):
OSTI ID: 1457155; OSTI ID: 1463858; OSTI ID: 1480806
Report Number(s):
arXiv:1805.08123; FERMILAB-PUB-18-207-TD; BNL-207933-2018-JAAM
Journal ID: ISSN 2469-9888; PRABCJ; 082002
Grant/Contract Number:  
AC02-98CH10886; AC02-05CH11231; SC0007519; AC02-07CH11359; SC0012704; 284404
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 21 Journal Issue: 8; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 42 ENGINEERING; particle collider; crab activity; luminosity; radio frequency calculations; superconducting RF

Citation Formats

Verdú-Andrés, S., Artoos, K., Belomestnykh, S., Ben-Zvi, I., Boulware, C., Burt, G., Calaga, R., Capatina, O., Carra, F., Castilla, A., Clemens, W., Grimm, T., Kuder, N., Leuxe, R., Li, Z., McEwen, E. A., Park, H., Powers, T., Ratti, A., Shipman, N., Skaritka, J., Wu, Q., Xiao, B. P., Yancey, J., and Zanoni, C.. Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system. United States: N. p., 2018. Web. https://doi.org/10.1103/PhysRevAccelBeams.21.082002.
Verdú-Andrés, S., Artoos, K., Belomestnykh, S., Ben-Zvi, I., Boulware, C., Burt, G., Calaga, R., Capatina, O., Carra, F., Castilla, A., Clemens, W., Grimm, T., Kuder, N., Leuxe, R., Li, Z., McEwen, E. A., Park, H., Powers, T., Ratti, A., Shipman, N., Skaritka, J., Wu, Q., Xiao, B. P., Yancey, J., & Zanoni, C.. Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system. United States. https://doi.org/10.1103/PhysRevAccelBeams.21.082002
Verdú-Andrés, S., Artoos, K., Belomestnykh, S., Ben-Zvi, I., Boulware, C., Burt, G., Calaga, R., Capatina, O., Carra, F., Castilla, A., Clemens, W., Grimm, T., Kuder, N., Leuxe, R., Li, Z., McEwen, E. A., Park, H., Powers, T., Ratti, A., Shipman, N., Skaritka, J., Wu, Q., Xiao, B. P., Yancey, J., and Zanoni, C.. Mon . "Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system". United States. https://doi.org/10.1103/PhysRevAccelBeams.21.082002.
@article{osti_1464300,
title = {Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system},
author = {Verdú-Andrés, S. and Artoos, K. and Belomestnykh, S. and Ben-Zvi, I. and Boulware, C. and Burt, G. and Calaga, R. and Capatina, O. and Carra, F. and Castilla, A. and Clemens, W. and Grimm, T. and Kuder, N. and Leuxe, R. and Li, Z. and McEwen, E. A. and Park, H. and Powers, T. and Ratti, A. and Shipman, N. and Skaritka, J. and Wu, Q. and Xiao, B. P. and Yancey, J. and Zanoni, C.},
abstractNote = {Crab crossing is essential for high-luminosity colliders. The high-luminosity Large Hadron Collider (HL-LHC) will equip one of its interaction points (IP1) with double-quarter wave (DQW) crab cavities. A DQW cavity is a new generation of deflecting rf cavities that stands out for its compactness and broad frequency separation between fundamental and first high-order modes. The deflecting kick is provided by its fundamental mode. Each HL-LHC DQW cavity shall provide a nominal deflecting voltage of 3.4 MV, although up to 5.0 MV may be required. A proof-of-principle (POP) DQW cavity was limited by quench at 4.6 MV. This paper describes a new, highly optimized cavity, designated the DQW SPS series, which satisfies dimensional, cryogenic, manufacturing, and impedance requirements for beam tests at the Super Proton Synchrotron (SPS) and operation in the LHC. Two prototypes of this DQW SPS series were fabricated by U.S. industry and cold tested after following a conventional superconducting radio-frequency surface treatment. Both units outperformed the POP cavity, reaching a deflecting voltage of 5.3-5.9 MV. This voltage - the highest reached by a DQW cavity - is well beyond the nominal voltage of 3.4 MV and may even operate at the ultimate voltage of 5.0 MV with a sufficient margin. This paper covers fabrication, surface preparation, and cryogenic rf test results and implications.},
doi = {10.1103/PhysRevAccelBeams.21.082002},
journal = {Physical Review Accelerators and Beams},
number = 8,
volume = 21,
place = {United States},
year = {2018},
month = {8}
}

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    Works referencing / citing this record:

    Design studies of a compact superconducting rf crab cavity for future colliders using Nb/Cu technology
    journal, July 2019


    Design studies of a compact superconducting rf crab cavity for future colliders using Nb/Cu technology
    journal, July 2019


    Development and vertical tests of a 166.6 MHz proof-of-principle superconducting quarter-wave beta = 1 cavity
    journal, August 2019

    • Zhang, Pei; Zhang, Xinying; Li, Zhongquan
    • Review of Scientific Instruments, Vol. 90, Issue 8
    • DOI: 10.1063/1.5119093