Göttingen 2012 – scientific programme

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T: Fachverband Teilchenphysik

T 65: Halbleiterdetektoren: Neue Materialien und Konzepte

T 65.3: Talk

Wednesday, February 29, 2012, 17:15–17:30, ZHG 001

Studies of proton irradiated n⁺-in-n planar pixel sensors for the ATLAS upgrade — •Silke Altenheiner, Claus Gößling, Reiner Klingenberg, Tobias Lapsien, Till Plümer, André Rummler, and Tobias Wittig — Experimentelle Physik IV, TU Dortmund, 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 HL-LHC. Associated with an increase in instantaneous luminosity is a rise of the target integrated luminosity which directly translates into significant 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. Being very close to the beam, the radiation damage of the IBL sensors might be as high as 5*10¹⁵n_eqcm⁻² at their end-of-life. The total fluence of the innermost pixel layer after the HL-LHC upgrade might even reach 2*10¹⁶n_eqcm⁻². We have performed systematic measurements of proton irradiated planar pixel SingleChips with the FE-I4 readout chip. First results from lab measurements as well as testbeam measurements will be presented.