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Belle II Detector

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Belle II Detector

The Belle II detector is an upcoming general-purpose spectrometer at the upgraded accelerator complex SuperKEKB at KEK in Tsukuba, Japan.

The Belle II detector consists of several sub-detector components:

  • Two layers of pixelated silicon sensors (PXD) and four layers of double-sided silicon strip sensors (SVD) that measure decay vertex positions of B mesons and other particles,
  • A barrel-shaped array of Time-Of-Propagation (TOP) counters that reconstruct, in spacial and time coordinates, the ring-image of Cherenkov light cones emitted from charged particles passing through quartz radiator bars, another ring-imaging Cherenkov counters with aerogel radiator in the forward end-cap (ARICH),
  • An iron flux-return located outside of the coil which is instrumented to detect K0L mesons and to identify muons (KLM).
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