A. LuninFermilab, Batavia, USA, T. KhabiboullineFermilab, Batavia, USA, A. SukhanovFermilab, Batavia, USA, V. YakovlevFermilab, Batavia, USA
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引用次数: 0
摘要
费米实验室最近完成了用于 LCLS-II 项目的 1.3 GHz 低温模块的生产和测试。每个低温模块由八个 TESLA 形超导椭圆腔组成，配备两个高阶模式（HOM）耦合器端口。对高阶模频谱的测量是室温下空腔进场质量控制和低温模组测试设施（CMTF）低温模组最终鉴定的一部分。在本文中，我们介绍了测量 HOM 光谱的程序以及进一步的数据处理。最后，我们介绍了与各种腔体供应商相关的单个 HOM 频率和质量因子的累积统计数据，并讨论了 HOM 对热负荷和光束动力学可能造成的影响。
Results of High Order Modes Spectra Measurements in 1.3 GHz Cavities for LCLS-II
Fermilab recently completed production and testing of 1.3 GHz cryomodules for
the LCLS-II project. Each cryomodule consists of eight TESLA-shaped
superconducting elliptical cavities equipped with two High Order Mode (HOM)
coupler ports. Measurement of the HOM spectrum is part of the incoming quality
control of cavities at room temperature and the final qualification cold test
of cryomodules at the Cryomodule Test Facility (CMTF). In this paper we
describe the procedure for measuring the HOM spectrum along with further data
processing. Finally, we present accumulated statistics of individual HOM
frequencies and quality factors related to various cavity vendors and discuss
the possible contribution of HOMs to heat loads and beam dynamics.
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