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The DC-DC conversion power system of the CMS Phase-1 pixel upgrade

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Published 29 January 2015 © CERN 2015, published under license by IOP Publishing Ltd and Sissa Medialab srl
, , Topical Workshop on Electronics for Particle Physics Citation L. Feld et al 2015 JINST 10 C01052 DOI 10.1088/1748-0221/10/01/C01052

1748-0221/10/01/C01052

Abstract

The pixel detector of the CMS experiment will be exchanged during the year-end technical stop in 2016/2017, as part of the experiment's Phase-1 upgrade. The new device will feature approximately twice the number of readout channels, and consequently the power consumption will be doubled. By moving to a DC-DC conversion powering scheme, it is possible to power the new pixel detector with the existing power supplies and cable plant.

The power system of the Phase-1 pixel detector is described and the performance of the new components, including DC-DC converters, DC-DC converter motherboards and various power distribution boards, is detailed. The outcome of system tests in terms of electrical behaviour, thermal management and pixel module performance is discussed.

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10.1088/1748-0221/10/01/C01052