Jinliu Su , Yudong Liu , Zhi Liu , Di Yin , Huizhou Ma , Yanru Wei , Huiping Geng , Dechong Zhu , Ge Lei , Junhui Yue , Wan Zhang , Chenghui Yu , Cunyang Que
{"title":"BEPCII 中横梁不稳定性的实验研究","authors":"Jinliu Su , Yudong Liu , Zhi Liu , Di Yin , Huizhou Ma , Yanru Wei , Huiping Geng , Dechong Zhu , Ge Lei , Junhui Yue , Wan Zhang , Chenghui Yu , Cunyang Que","doi":"10.1016/j.nima.2024.170036","DOIUrl":null,"url":null,"abstract":"<div><div>With the high current physical operations of the upgraded Beijing Electron–Positron Collider (BEPCII), thresholds on collision luminosity and beam current have been presented due to various factors such as collision background, noise, equipment stability under high power operation, and so on. One of the most serious influences on beam dynamics was beam instability which has been clearly exhibited. The comprehensive experimental investigation of beam instabilities in BEPCII is an indispensable part of beam physics research and can provide references for the upgrade project of BEPCII. Over the past two years, the experimental investigation of beam instabilities in BEPCII has been carried on with the single and multiple bunch filling in the storage ring. Various impedances, the sources of beam instabilities, including broadband and narrowband impedances in longitudinal and transverse planes are studied. The measured impedance values are compared with the initial design of BEPCII.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1070 ","pages":"Article 170036"},"PeriodicalIF":1.5000,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental investigation of beam instabilities in BEPCII\",\"authors\":\"Jinliu Su , Yudong Liu , Zhi Liu , Di Yin , Huizhou Ma , Yanru Wei , Huiping Geng , Dechong Zhu , Ge Lei , Junhui Yue , Wan Zhang , Chenghui Yu , Cunyang Que\",\"doi\":\"10.1016/j.nima.2024.170036\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>With the high current physical operations of the upgraded Beijing Electron–Positron Collider (BEPCII), thresholds on collision luminosity and beam current have been presented due to various factors such as collision background, noise, equipment stability under high power operation, and so on. One of the most serious influences on beam dynamics was beam instability which has been clearly exhibited. The comprehensive experimental investigation of beam instabilities in BEPCII is an indispensable part of beam physics research and can provide references for the upgrade project of BEPCII. Over the past two years, the experimental investigation of beam instabilities in BEPCII has been carried on with the single and multiple bunch filling in the storage ring. Various impedances, the sources of beam instabilities, including broadband and narrowband impedances in longitudinal and transverse planes are studied. The measured impedance values are compared with the initial design of BEPCII.</div></div>\",\"PeriodicalId\":19359,\"journal\":{\"name\":\"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment\",\"volume\":\"1070 \",\"pages\":\"Article 170036\"},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2024-11-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0168900224009628\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"INSTRUMENTS & INSTRUMENTATION\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0168900224009628","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
Experimental investigation of beam instabilities in BEPCII
With the high current physical operations of the upgraded Beijing Electron–Positron Collider (BEPCII), thresholds on collision luminosity and beam current have been presented due to various factors such as collision background, noise, equipment stability under high power operation, and so on. One of the most serious influences on beam dynamics was beam instability which has been clearly exhibited. The comprehensive experimental investigation of beam instabilities in BEPCII is an indispensable part of beam physics research and can provide references for the upgrade project of BEPCII. Over the past two years, the experimental investigation of beam instabilities in BEPCII has been carried on with the single and multiple bunch filling in the storage ring. Various impedances, the sources of beam instabilities, including broadband and narrowband impedances in longitudinal and transverse planes are studied. The measured impedance values are compared with the initial design of BEPCII.
期刊介绍：
Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section.
Theoretical as well as experimental papers are accepted.
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