Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 35: HK+T Joint Session V: Silicon Strip Detectors

HK 35.5: Talk

Wednesday, March 29, 2017, 17:45–18:00, F 102

Long Term Annealing Studies on ATLAS12 Sensors — •Leena Diehl, Riccardo Mori, Marc Hauser, Susanne Kühn, Ulrich Parzefall, Ines Messmer, and Karl Jakobs — Albert-Ludwigs-Universität Freiburg

Non-ionizing energy loss (NIEL) causes damage to silicon particle detectors, resulting for p-type sensors in an increased effective doping concentration, growing depletion voltage and leakage current. Defects in the lattice are mobile with an exponential temperature dependence.

Therefore, a long-term study of damage parameters is performed as a function of time at Room Temperature and 60^∘C, using irradiated p-type sensors up to a fluence of 2e15 n_eq/cm². Measurements include the charge collection and leakage current behavior, the scaling factor between the two temperatures and the behavior of the effective doping concentration. A strong deviation from the conventional scaling factor is found.