Author: Natochii, A.
Paper Title Page
TUZAT0103 Beam-Induced Background Simulation and Measurements in Belle II at SuperKEKB 71
 
  • A. Natochii
    University of Hawaii, Honolulu,, USA
 
  Funding: The work is supported by the U.S. Department of Energy (DOE) via Award Number DE-SC0007852 and via U.S. Belle II Operations administered by Brookhaven National Laboratory (DE-SC0012704).
Seeking New Physics beyond the Standard Model, the Belle~II experiment at the SuperKEKB electron-positron collider has already reached a peak luminosity of about 4.7·1034 cm-2.s-1. Its unprecedented target luminosity of 6.3·1035 cm-2.s-1 requires stable machine operation and proper control of beam-induced backgrounds for safe detector operation at high beam currents. The leading background components originating from stored and colliding beams can now be predicted with reasonable accuracy. Dedicated simulations based on the particle tracking software Strategic Accelerator Design (SAD) and Geant4 are used to predict beam-induced backgrounds. These simulations are important for studying realistic collimation scenarios, estimating associated background levels at future machine optics, and making informed choices between possible machine and detector protection upgrades. This paper reports on the Belle~II beam-induced background status in 2021–2022. It overviews background simulation and measurement methodology, and discusses the expected background evolution and mitigation strategies at higher luminosity.
 
slides icon Slides TUZAT0103 [5.565 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-eeFACT2022-TUZAT0103  
About • Received ※ 28 October 2022 — Accepted ※ 08 February 2023 — Issue date ※ 11 February 2023  
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