Lessons Learned From BaBar Silicon Vertex Tracker, Limits, And Future Perspectives of the Detector

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The silicon vertex tracker (SVT) of the BaBar experiment at PEP-II is described. This is the crucial device for the measurement of the meson decay vertices to extract charge-conjugation parity (CP) asymmetries. It consists of five layers of double-sided ac-coupled silicon strip detectors, read out by a full-custom integrated circuit, capable of simultaneous acquisition, digitization, and transmission of data. It represents the core of the BaBar tracking system, providing position measurements with a precision of 10 m (inner layers) and 30 m (outer layers). The relevant performances of the SVT are presented, and the experience acquired during the construction, installation, ... continued below

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6 pages

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Re, V.; Kirkby, D.; Bruinsma, M.; Curry, S.; Berryhill, J.; Burke, S. et al. February 17, 2006.

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Description

The silicon vertex tracker (SVT) of the BaBar experiment at PEP-II is described. This is the crucial device for the measurement of the meson decay vertices to extract charge-conjugation parity (CP) asymmetries. It consists of five layers of double-sided ac-coupled silicon strip detectors, read out by a full-custom integrated circuit, capable of simultaneous acquisition, digitization, and transmission of data. It represents the core of the BaBar tracking system, providing position measurements with a precision of 10 m (inner layers) and 30 m (outer layers). The relevant performances of the SVT are presented, and the experience acquired during the construction, installation, and the first five years of data-taking is described. Innovative solutions are highlighted, like the sophisticated alignment procedure, imposed by the design of the silicon tracker, integrated in the beamline elements and mechanically separated from the other parts of BaBar. The harshness of the background conditions in the interaction region required several studies on the radiation damage of the sensors and the front-end chips, whose results are presented. Over the next five years the luminosity is predicted to increase by a factor three, leading to radiation and occupancy levels significantly exceeding the detector design. Extrapolation of future radiation doses and occupancies is shown together with the expected detector performance and lifetime. Upgrade scenarios to deal with the increased luminosity and backgrounds are discussed.

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6 pages

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  • Journal Name: IEEE Transactions on Nuclear Science; Journal Volume: 52

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  • Report No.: SLAC-PUB-11695
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 876460
  • Archival Resource Key: ark:/67531/metadc877976

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 17, 2006

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • July 13, 2017, 4:37 p.m.

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Re, V.; Kirkby, D.; Bruinsma, M.; Curry, S.; Berryhill, J.; Burke, S. et al. Lessons Learned From BaBar Silicon Vertex Tracker, Limits, And Future Perspectives of the Detector, article, February 17, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc877976/: accessed November 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.