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T: Fachverband Teilchenphysik

T 65: Halbleiterdetektoren V

T 65.2: Vortrag

Freitag, 1. April 2011, 14:15–14:30, 30.21: 001

DC-DC converters for the upgrades of the CMS tracker — •Jan Sammet, Lutz Feld, Waclaw Karpinski, Katja Klein, Jennifer Merz, Jakob Wehner, and Michael Wlochal — RWTH Aachen University, I. Physikalisches Instiut B

Within the present decade, it is foreseen to gradually increase the instantaneous luminosity of the LHC to 1-2 x 10³⁴cm⁻²s⁻¹. Around 2020, it is intended to increase the luminosity further, to about 5 x 10³⁴cm⁻²s⁻¹. To ensure and improve its physics performance, CMS is going to exchange its pixel detector around 2016. Four years later the complete tracker is going to be replaced by a new development. The use of DC-DC converters is foreseen for both of these upgrades. Radiation tolerant converters developed by working groups at CERN and Aachen match the requirements of the new pixel detector already. However, further work is required to integrate the converters on system level and to ensure their save and reliable operation. The status of this work will be presented. Building a new tracking detector equipped with converters, raises several additional challenges. In particular the noise performance of the converters and their efficiency at large conversion ratios still has to be improved. The coil, used by the converters to buffer energy, has a significant impact on both of these issues. Effort has been put into the optimization of converter coils, as well as into the exploration and minimization of noise radiated by the coils. The talk will give a summary of the results of this work.