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Performance of the Belle II silicon vertex detector
- Source :
- Scopus-Elsevier, PoS, 28th International Workshop on Vertex Detectors, 28th International Workshop on Vertex Detectors, Oct 2019, Lopud Island, Croatia. pp.014, ⟨10.22323/1.373.0014⟩, Nucl.Instrum.Meth.A, Nucl.Instrum.Meth.A, 2020, 972, pp.164129. ⟨10.1016/j.nima.2020.164129⟩
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Abstract
- The Belle II experiment at the SuperKEKB collider of KEK (Japan) started recording physics data in spring 2019 with all its subdetectors installed and with the goal of accumulating 50ab−1 of e+e− collision events at the unprecedented instantaneous luminosity of 8×1035cm−2s−1, about 40 times larger than its predecessor. The Belle II vertex detector plays a crucial role in the broad Belle II physics program, especially for time-dependent CP measurements. It consists of two layers of DEPFET-based pixels and four layers of double-sided silicon strip detectors (SVD). The experience gained from the first period of SVD operation can be summarized as smooth and reliable running of the detector, with high stability of noise levels and calibration parameters obtained from local calibration runs. No major problem has been experienced. The detector even survived a few serious radiation accidents in which the beam was lost due to failure in the machine focusing quadrupoles without any notable damage. The SVD performance were carefully studied with these first physics data. The SVD showed excellent hit and tracking efficiency. Moreover, cluster energy and signal to noise ratio as well as the hit time and spatial resolutions measured on data showed a fair agreement with the expected performance.
- Subjects :
- Vertex (graph theory)
Nuclear and High Energy Physics
Particle physics
Matching (graph theory)
Performance
vertex detector
BELLE
fabrication
01 natural sciences
7. Clean energy
Noise (electronics)
Silicon vertex detector
030218 nuclear medicine & medical imaging
03 medical and health sciences
0302 clinical medicine
semiconductor detector: pixel
0103 physical sciences
Singular value decomposition
Belle II
vertex detector: design
Silicon Vertex Detector
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
010306 general physics
Instrumentation
activity report
Physics
010308 nuclear & particles physics
Resolution (electron density)
Detector
Belle experiment
Vertex (geometry)
semiconductor detector: microstrip
Vertex detector
Impact parameter
SVD
performance
semiconductor detector: design
experimental results
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Scopus-Elsevier, PoS, 28th International Workshop on Vertex Detectors, 28th International Workshop on Vertex Detectors, Oct 2019, Lopud Island, Croatia. pp.014, ⟨10.22323/1.373.0014⟩, Nucl.Instrum.Meth.A, Nucl.Instrum.Meth.A, 2020, 972, pp.164129. ⟨10.1016/j.nima.2020.164129⟩
- Accession number :
- edsair.doi.dedup.....8c47eac4f2717e3be3f6622078c4eb53