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Czochralski Silicon as a Detector Material for S-LHC Tracker Volumes

By Leonard Spiegel, Tobias Barvich, Burt Betchart, Saptaparna Bhattacharya, Sandor Czellar, Regina Demina, Alexander Dierlamm, Martin Frey, Yuri Gotra, Jaakko Härkönen, Frank Hartmann, Ivan Kassamakov, Sergey Korjenevski, Matti J. Kortelainen, Tapio Lampén, Teppo Mäenpää, Henri Moilanen, Meenakshi Narain, Maike Neuland, Douglas Orbaker, Hans-Jürgen Simonis, Pia Steck, Eija Tuominen and Esa Tuovinen

Abstract

With an expected ten-fold increase in luminosity in S-LHC, the radiation environment in the tracker volumes will be considerably harsher for silicon-based detectors than the already harsh LHC environment. Since 2006, a group of CMS institutes, using a modified CMS DAQ system, has been exploring the use of Magnetic Czochralski silicon as a detector element for the strip tracker layers in S-LHC experiments. Both p+/n-/n+ and n+/p-/p+ sensors have been characterized, irradiated with proton and neutron sources, assembled into modules, and tested in a CERN beamline. There have been three beam studies to date and results from these suggest that both p+/n-/n+ and n+/p-/p+ Magnetic Czochralski silicon are sufficiently radiation hard for the $R>25$ cm regions of S-LHC tracker volumes. The group has also explored the use of forward biasing for heavily irradiated detectors, and although this mode requires sensor temperatures less than -50\,$^\circ$C, the charge collection efficiency appears to be promising

Topics: Magnetic Czochralski silicon, Current injected detector, SiBT, 114 Physical sciences
Publisher: 'Elsevier BV'
Year: 2010
DOI identifier: 10.1016/j.nima.2010.06.327
OAI identifier: oai:helda.helsinki.fi:10138/42377
Journal:

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