Operational experience and performance of the Belle II silicon vertex detector after the first SuperKEKB long shutdown

Collaboration
Jul 23, 2024
Published in:
  • Nucl.Instrum.Meth.A 1067 (2024) 169652
  • Published: Jul 23, 2024
DOI:
Experiments:

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Abstract: (Elsevier B.V.)
The Belle II experiment searches for beyond-the-standard-model physics using the Belle II detector and SuperKEKB collider. The silicon vertex detector (SVD) is crucial for particle tracking. After the 1.5-year shutdown from June 2022, Run 2 began in January 2024; Run 2 operation shows stable noise levels, high signal-to-noise ratios, and hit efficiency over 99%. To manage higher beam background from increased luminosity, new techniques such as hit-time selection and cluster grouping are being developed. These methods increase the acceptable level of occupancy by distinguishing hits from triggered collisions and other sources.
  • Belle II
  • Vertex detector
  • Silicon strip detector
  • Radiation damage