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The Silicon Vertex Detector of the Belle II experiment
- Source :
- Nucl.Instrum.Meth.A, 16th Vienna Conference on Instrumentation, 16th Vienna Conference on Instrumentation, Feb 2022, Wien, Austria. pp.166952, ⟨10.1016/j.nima.2022.166952⟩
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- International audience; Since the start of data taking in spring 2019 at the SuperKEKB collider (KEK, Japan) the Belle II Silicon Vertex Detector (SVD) has been operating reliably and with high efficiency, while providing high quality data: high signal-to-noise ratio, greater than 99% hit efficiency, and precise spatial resolution. These attributes, combined with stability over time, result in good tracking efficiency. Currently the occupancy, dominated by beam-background hits, is quite low (about 0.5 % in the innermost layer), causing no problems to the SVD data reconstruction. In view of the operation at higher luminosity foreseen in the next years, specific strategies aiming to preserve the tracking performance have been developed and tested on data. The time stability of the trigger allows reducing sampling of the strip-amplifier waveform. The good hit-time resolution can be exploited to further improve the robustness against the higher level of beam background. First effects of radiation damage on strip noise, sensor currents and depletion voltage have been measured: they do not have any detrimental effect on the performance of the detector. Furthermore, no damage to the SVD is observed after sudden and intense bursts of radiation due to beam losses.
- Subjects :
- Nuclear and High Energy Physics
Physics - Instrumentation and Detectors
Tracking
FOS: Physical sciences
Instrumentation and Detectors (physics.ins-det)
High Energy Physics - Experiment
Radiation damage
High Energy Physics - Experiment (hep-ex)
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Vertex detector
Belle II
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Silicon strip sensor
Instrumentation
Subjects
Details
- ISSN :
- 01689002
- Volume :
- 1038
- Database :
- OpenAIRE
- Journal :
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
- Accession number :
- edsair.doi.dedup.....80b1ea6c398307836e45a6178eea619f