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  A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB

Gabriel, M., Simon, F., Windel, H., Funakoshi, Y., Hedges, M., Iida, N., et al. (2021). A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB. European Physical Journal C, 81, 972. doi:10.1140/epjc/s10052-021-09769-3.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000A-1B4C-4 Version Permalink: https://hdl.handle.net/21.11116/0000-000A-1B4D-3
Genre: Journal Article

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 Creators:
Gabriel, Miroslav1, Author
Simon, Frank1, Author
Windel, Hendrik1, Author
Funakoshi, Yoshihiro1, Author
Hedges, Michael1, Author
Iida, Naoko1, Author
Jaegle, Igal1, Author
Kiesling, Christian1, Author
Kolk, Naomi van der1, Author
Lewis, Peter1, Author
Nakayama, Hiroyuki1, Author
Ohnishi, Yukiyoshi1, Author
Sangro, Riccardo de1, Author
Suetsugu, Yusuke1, Author
Szalay, Marco1, Author
Vahsen, Sven1, Author
Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650              

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Free keywords: Belle II
 Abstract: We report on measurements of beam backgrounds during the first commissioning phase of the SuperKEKB collider in 2016, performed with the plastic scintillator and silicon photomultiplier-based CLAWS detector system. The sub-nanosecond time resolution and single particle detection capability of the sensors allow bunch-by-bunch measurements, enable CLAWS to perform a novel time resolved analysis of beam backgrounds, and make the system uniquely suited for the study of injection backgrounds. We present measurements of various aspects of regular beam background and injection backgrounds which include time structure and decay behavior of injection backgrounds, hit-energy spectra and overall background rates. These measurements show that the elevated background rates following an injection generally last for several milliseconds, with the majority of the background particles typically observed within the first 500 us. The injection backgrounds exhibit pronounced patterns in time, connected to betatron and synchrotron oscillations in the accelerator rings. The frequencies of these patterns are determined from detector data.

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 Dates: 2021
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: Other: MPP-2020-234
URI: https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2020-234
arXiv: arxiv:2012.10948
DOI: 10.1140/epjc/s10052-021-09769-3
URI: https://inspirehep.net/literature?q=find%20eprint%202012.10948
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Title: European Physical Journal C
  Abbreviation : Eur.Phys.J.C
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 81 Sequence Number: - Start / End Page: 972 Identifier: -