Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 66: Halbleiterdetektoren VI
T 66.7: Vortrag
Freitag, 1. April 2011, 15:30–15:45, 30.22: 022
Sensor studies of n+-in-n planar pixel sensors for the ATLAS upgrades — Silke Altenheiner, Claus Gössling, •Jennifer Jentzsch, Reiner Klingenberg, Daniel Muenstermann, André Rummler, Georg Troska, and Tobias Wittig — TU Dortmund, Experimentelle Physik IV, D-44221 Dortmund
The ATLAS experiment at the LHC is planning upgrades of its pixel detector to cope with the luminosity increase foreseen in the coming years within the transition from LHC to Super-LHC (SLHC/HL-LHC). Associated with an increase in instantaneous luminosity is a rise of the target integrated luminosity from 730 fb−1 to about 3000 fb−1 which directly translates into significantly higher radiation damage.
These upgrades consist of the installation of a 4th pixel layer, the insertable b-layer IBL, with a mean sensor radius of only 32 mm from the beam axis, before 2016/17. In addition, the complete pixel detector will be exchanged before 2020/21. Being very close to the beam, the radiation damage of the IBL sensors might be as high as 5·1015neqcm−2 at their end-of-life. The total fluence of the innermost pixel layer after the SLHC upgrade might even reach 2·1016neqcm−2.
We have performed systematic measurements of planar pixel detectors based on the current ATLAS readout chip FE-I3 and obtained first experience with the new IBL readout chip FE-I4. First results will be presented.