Münster 2017 – scientific programme
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T: Fachverband Teilchenphysik
T 92: Strahlenschäden (gemeinsam mit HK)
T 92.3: Talk
Wednesday, March 29, 2017, 17:15–17:30, F 234
Studies of radiation field impact on microstrip sensors for the CBM Silicon Tracking System — •Ievgeniia Momot1,2,3, Olga Bertini2, Maksym Teklishyn3,4, Anton Lymanets2,3, Hanna Malygina1,2,3, Johann Heuser2, and Christian Sturm2 for the CBM collaboration — 1Goethe-Universität, Frankfurt — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt — 3KINR, Kyiv Institute for Nuclear Research, Kyiv, Ukraine — 4FAIR, Facility for Antiproton and Ion Research, Darmstadt, Germany
The Silicon Tracking System (STS) is the main tracking detector of CBM experiment. Located in the dipole magnet, reconstructs tracks and determines momentum of charged particles originating from beam-target interactions. The response of double-sided silicon micro-strip sensors to hits is very depended on the radiation load on the detector, which is expected to reach 1014 1 MeV neq/cm2. It is vital to maintain signal-to-noise ratio at the level of ≈ 10 to keep 98% hit reconstruction efficiency after irradiation up to the CBM lifetime dose. Results of testing newest prototypes of sensors from two different vendors to fluences between 1013 and 2×1014 neq/cm2 will be reviewed. Thus the total effect of the different radiation doses on the signal-to-noise ratio will be presented.
Supported by HIC for FAIR and HGS-HIRe.