Abstract
The Silicon Vertex Tracker (SVT) of the BaBar experiment at PEP-II, the crucial tool to measure the decay positions of B-mesons and extract CP-asymmetries, is described. SVT is structured in 5 layers made of double sided AC-coupled Silicon strip detectors , and read-out by a full- custom integrated circuit to amplify, digitize and transmit data. During its first year of operation, SVT has routinely performed spatial measurements with a precision of 10μm (inner layers) and 30μm (outer layers), with a single hit efficiency of 97%. Other relevant SVT features and their impact on physics measurements are reported. New measurements on radiation damage induced by iGeV electrons and electron-induced e.m. showers are described and compared with the data on SVT modules. New data indicate a greater radiation damage than expected from Cobalt source irradiations, setting a limit of 4 years at full PEP-II luminosity for the lifetime of the inner SVT layers.
Original language | English (US) |
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Pages | 3/65-3/69 |
State | Published - 2000 |
Externally published | Yes |
Event | 2000 IEEE Nuclear Science Symposium Conference Record - Lyon, France Duration: Oct 15 2000 → Oct 20 2000 |
Other
Other | 2000 IEEE Nuclear Science Symposium Conference Record |
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Country/Territory | France |
City | Lyon |
Period | 10/15/00 → 10/20/00 |
All Science Journal Classification (ASJC) codes
- Radiation
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging