Abstract
The Belle Silicon Vertex Detector (SVD) was designed to measure B meson decay positions precisely for studies of time-dependent CP violation. Although the first version of SVD (SVD1) worked for 4 years from 1999 with excellent performance, its insufficient radiation hardness drove us to build a second generation SVD (SVD2). The SVD2 was installed in Belle in the summer of 2003 and has been working well. The strip yield is estimated to be more than 95%. The signal-to-noise ratios are obtained to be 18-36, depending on detector ladders. The intrinsic spatial resolutions are obtained to be 12.0±0.4 and 22.3±0.8μm for φ- and z-sides, where z-side measures positions along the beam direction and φ side is used for the azimuthal angle measurement. In this letter, an overview and performance results are provided for both generations of the Belle SVD.
Original language | English |
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Pages (from-to) | 16-19 |
Number of pages | 4 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 549 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - Sep 1 2005 |
Externally published | Yes |
Event | VERTEX 2003 - Duration: Sep 14 2003 → Sep 19 2003 |
Keywords
- Belle
- KEKB
- Silicon vertex detector
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation