Bunch lifetime analysis based on the injection interval at SuperKEKB

Abstract We study the bunch lifetime dependence on the bunch position at the SuperKEKB main ring. The bunch lifetime ratio is evaluated from the injection interval. The lifetime imbalance is observed between the forward and backward of the bunch train at the positron ring. It becomes larger when the...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 2687; no. 2; pp. 22009 - 22014
Main Authors Kaji, Hiroshi, Funakoshi, Yoshihiro, Uehara, Sadaharu
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2024
Subjects
Luminosity
Service life assessment
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Summary:Abstract We study the bunch lifetime dependence on the bunch position at the SuperKEKB main ring. The bunch lifetime ratio is evaluated from the injection interval. The lifetime imbalance is observed between the forward and backward of the bunch train at the positron ring. It becomes larger when the beam current becomes larger. The luminosity dependence on the RF-bucket spacing can be explained with the lifetime dependency which we determined in this analysis. The result indicates the existence of the unknown phenomenon which varies the Touschek lifetime with the RF-bucket spacing in the electron ring.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2687/2/022009