{"title":"Performance test of half-wave resonator (HWR) superconducting cavities","authors":"Heetae Kim, Sungmin Jeon, Juwan Kim, Yoochul Jung","doi":"10.1007/s40042-024-01084-w","DOIUrl":null,"url":null,"abstract":"<div><p>The evaluation of half-wave resonator (HWR) cavity performance is presented in this study. We demonstrate the time-dependent characteristics of the fast cool-down process, as well as the RF conditioning and measurement procedures, including input power, reflected power, and transmitted power. Measurements encompass quality factor, resonance frequency, Lorentz force detuning (LFD), pressure sensitivity, and surface resistance for the HWR cavities. Furthermore, we determine Q slopes at temperatures of 4.2 K and 2 K for these cavities. Utilizing the Q slope data, we calculate the BCS resistance and estimate the bandgap for the Nb HWR cavity.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Korean Physical Society","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s40042-024-01084-w","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The evaluation of half-wave resonator (HWR) cavity performance is presented in this study. We demonstrate the time-dependent characteristics of the fast cool-down process, as well as the RF conditioning and measurement procedures, including input power, reflected power, and transmitted power. Measurements encompass quality factor, resonance frequency, Lorentz force detuning (LFD), pressure sensitivity, and surface resistance for the HWR cavities. Furthermore, we determine Q slopes at temperatures of 4.2 K and 2 K for these cavities. Utilizing the Q slope data, we calculate the BCS resistance and estimate the bandgap for the Nb HWR cavity.
期刊介绍：
The Journal of the Korean Physical Society (JKPS) covers all fields of physics spanning from statistical physics and condensed matter physics to particle physics. The manuscript to be published in JKPS is required to hold the originality, significance, and recent completeness. The journal is composed of Full paper, Letters, and Brief sections. In addition, featured articles with outstanding results are selected by the Editorial board and introduced in the online version. For emphasis on aspect of international journal, several world-distinguished researchers join the Editorial board. High quality of papers may be express-published when it is recommended or requested.
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