The Belle Silicon Vertex Detector

✍ Scribed by H. Ishino

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 180 KB
• Volume: 549
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2005.04.018

✦ Synopsis

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 AE 0:4 and 22:3 AE 0:8 mm for fand z-sides, where z-side measures positions along the beam direction and f 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.