Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system
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...
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
American Physical Society
2018-08-01
|
Series: | Physical Review Accelerators and Beams |
Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.21.082002 |
id |
doaj-de518cb7a5dd45dcb4c63133ba5f0f9d |
---|---|
record_format |
Article |
spelling |
doaj-de518cb7a5dd45dcb4c63133ba5f0f9d2020-11-25T01:56:01ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882018-08-0121808200210.1103/PhysRevAccelBeams.21.082002Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity systemS. Verdú-AndrésK. ArtoosS. BelomestnykhI. Ben-ZviC. BoulwareG. BurtR. CalagaO. CapatinaF. CarraA. CastillaW. ClemensT. GrimmN. KuderR. LeuxeZ. LiE. A. McEwenH. ParkT. PowersA. RattiN. ShipmanJ. SkaritkaQ. WuB. P. XiaoJ. YanceyC. ZanoniCrab 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.http://doi.org/10.1103/PhysRevAccelBeams.21.082002 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
S. Verdú-Andrés K. Artoos S. Belomestnykh I. Ben-Zvi C. Boulware G. Burt R. Calaga O. Capatina F. Carra A. Castilla W. Clemens T. Grimm N. Kuder R. Leuxe Z. Li E. A. McEwen H. Park T. Powers A. Ratti N. Shipman J. Skaritka Q. Wu B. P. Xiao J. Yancey C. Zanoni |
spellingShingle |
S. Verdú-Andrés K. Artoos S. Belomestnykh I. Ben-Zvi C. Boulware G. Burt R. Calaga O. Capatina F. Carra A. Castilla W. Clemens T. Grimm N. Kuder R. Leuxe Z. Li E. A. McEwen H. Park T. Powers A. Ratti N. Shipman J. Skaritka Q. Wu B. P. Xiao J. Yancey C. Zanoni Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system Physical Review Accelerators and Beams |
author_facet |
S. Verdú-Andrés K. Artoos S. Belomestnykh I. Ben-Zvi C. Boulware G. Burt R. Calaga O. Capatina F. Carra A. Castilla W. Clemens T. Grimm N. Kuder R. Leuxe Z. Li E. A. McEwen H. Park T. Powers A. Ratti N. Shipman J. Skaritka Q. Wu B. P. Xiao J. Yancey C. Zanoni |
author_sort |
S. Verdú-Andrés |
title |
Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system |
title_short |
Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system |
title_full |
Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system |
title_fullStr |
Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system |
title_full_unstemmed |
Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system |
title_sort |
design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity lhc crab cavity system |
publisher |
American Physical Society |
series |
Physical Review Accelerators and Beams |
issn |
2469-9888 |
publishDate |
2018-08-01 |
description |
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. |
url |
http://doi.org/10.1103/PhysRevAccelBeams.21.082002 |
work_keys_str_mv |
AT sverduandres designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT kartoos designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT sbelomestnykh designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT ibenzvi designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT cboulware designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT gburt designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT rcalaga designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT ocapatina designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT fcarra designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT acastilla designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT wclemens designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT tgrimm designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT nkuder designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT rleuxe designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT zli designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT eamcewen designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT hpark designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT tpowers designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT aratti designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT nshipman designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT jskaritka designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT qwu designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT bpxiao designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT jyancey designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem AT czanoni designandverticaltestsofdoublequarterwavecavityprototypesforthehighluminositylhccrabcavitysystem |
_version_ |
1724982149417795584 |