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SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 21: Si-Strips/CMS, Pixel/Sensor

T 21.2: Vortrag

Montag, 20. März 2023, 16:45–17:00, WIL/C307

Thermal Measurements of 2S Modules with an evaporative CO2 Cooling System for the CMS Phase-2 Outer Tracker UpgradeChristian Dziwok2, Lutz Feld1, Katja Klein1, Martin Lipinski1, •Vanessa Oppenländer1, Alexander Pauls1, Oliver Pooth2, Nicolas Röwert1, Michael Wlochal1, and Tim Ziemons211. Physikalisches Institut B, RWTH Aachen — 23. Physikalisches Institut B, RWTH Aachen

The new operating conditions of the future HL-LHC require a replacement of the complete silicon tracking system of the CMS experiment as part of the CMS Phase-2 Upgrade. For the Phase-2 Outer Tracker new silicon strip modules, so-called 2S modules, are being developed that consist of two silicon sensors stacked on top of each other. The high radiation conditions of the HL-LHC lead to a higher leakage current in the silicon sensors, which is exponentially dependent on the sensor temperature. An evaporative CO2 cooling system will be used to cool the modules and ensure a successful operation. In an unstable cooling scenario it is possible that the module enters an uncontrolled self-heating loop called thermal runaway. Therefore it is crucial that the thermal properties and performance of the 2S modules and the cooling structure are tested and characterized. In this talk measurements with a test setup of 2S modules on a cooling structure using a custom CO2 cooling system will be presented.

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