JACoW : First RF Performance Results for the DQW Crab Cavities to be Tested in the CERN SPS
JACoW : First RF Performance Results for the DQW Crab Cavities to be Tested in the CERN SPS
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JACoW：DQW 蟹腔的首个射频性能结果将在 CERN SPS 中进行测试
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
K. Turaj
中科院分区：
文献类型：
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作者：
A. Castilla;I. Ben;G. Burt;R. Calaga;O. Capatina;K. Schirm;Karim Hernández;A. Macpherson;James Mitchell;N. Shipman;K. Turaj
作为高亮度LHC（HL-LHC）项目战略的一部分，螃蟹腔校正器将安装在LHC的CMS和ATLAS实验周围。为了适应不同的交叉角平面，选择了两种不同的腔设计：RF偶极子（RFD）和双四分之一波谐振器（DQW）。CERN已经制造了两个双四分之一波谐振器（DQW_SPS），用于在CERN SPS加速器上用质子束进行验证。标准的超导射频表面制备协议已被应用到两个散装铌腔，然后在欧洲核子研究中心的SM 18设施的垂直低温恒温器中进行低温测试。本文给出了DQW_SPS_001和DQW_SPS_002腔的首次裸腔实验结果，包括Q 0与VT的关系曲线、洛伦兹力失谐（LFD）分析和高阶模的压力灵敏度。
As part of the High Luminosity LHC (HL-LHC) project strategy, crab cavity correctors shall be installed around CMS and ATLAS experiments of the LHC. To accommodate the different crossing angle planes, two distinct cavity designs have been selected: the RF Dipole (RFD) and the Double Quarter Wave resonator (DQW). CERN has fabricated two double quarter wave resonators (DQW_SPS), for validation with a proton beam at the CERN SPS accelerator. Standard superconducting rf surface preparation protocols have been applied to the two bulk niobium cavities, followed by cryogenic testing in a vertical cryostat at CERN’s SM18 facility. The performance results obtained after the first bare cavity tests for cavities DQW_SPS_001 and DQW_SPS_002 are shown in this paper, and include Q0 vs VT curves, Lorentz Force Detuning (LFD) analyses and pressure sensitivity of a higher order mode.