Recent results from the CERN RD39 Collaboration on super-radiation hard cryogenic silicon detectors for LHC and LHC upgrade

摘要

The CERN RD39 Collaboration is developing super-radiation hard cryogenic Si detectors for applications in experiments of the LHC and the future LHC Upgrade. Radiation hardness up to the fluence of 10(16)n(eq)/cm(2) isrequired in the future experiments. Significant improvement in the radiation hardness of silicon sensors has taken place during the past years. However, 10(16) n(eq)/cm(2) is well beyond the radiation tolerance of even the most advanced semiconductor detectors made by commonly adopted technologies. Furthermore, at this radiation load the carrier trapping will limit the charge collection depth to the range of 20-30mum regardless of the depletion depth. The key of our approach is freezing the trapping that affects Charge Collection Efficiency (CCE). (C) 2004 Elsevier B.V. All rights reserved.