Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 2: Silizium-Streifen-Detektoren I

T 2.7: Talk

Monday, March 19, 2018, 17:30–17:45, Philo-HS2

Infrared tests on the ATLAS thermomechanical petal prototype built at DESY. — •Yasiel Delabat Diaz, Claire A. David, Ingrid-Maria Gregor, Jan-Hendrik Arling, and Sergio Diez Cornell — Deutsches Elektronen-Synchrotron (DESY)

The infrared measurements on the thermomechanical petal prototype of the ATLAS end-cap strip detector were performed using a customized thermal chamber built at DESY. Using for the first time CO₂ cooling for the prototype’s thermal cycles, temperatures of around -25^∘C were reached. After each cycle, it was observed that the sensors tend not to keep thermal memory (i.e. they are not damaged). Preliminary comparisons with FEA simulations also showed fairly similar behaviour with respect to the measurements performed on both sides of the petal. In addition, a thermographic correction squeme was investigated, aiming to use a mathematical approach for emissivity correction that would eliminate the necesity of covering the petal surface with high emissivity black tape. With that purpose, the IR camera’s spectral response scale factor was estimated and the viewing angle influence in the measurements was studied founding it to be negligible.