Evaporative CO2 cooling using microchannels etched in silicon for the future LHCb vertex detector

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Published 4 April 2013 • Published under licence by IOP Publishing Ltd
, , Citation A Nomerotski et al 2013 JINST 8 P04004 DOI 10.1088/1748-0221/8/04/P04004

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Author affiliations

1 CERN, CH-1211 Genève 23, Switzerland

2 Particle Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK

3 Skobelitsyn Institute of Nuclear Physics, Moscow State University, Moscow 119991, Russian Federation

4 Department of Engineering Physics, Tsinghua University, Beijing 100084, China

5 Department of Mechanical Engineering, University of Genoa, Via all'Opera Pia 15, Genoa 16145, Italy

6 NIKHEF, Science Park 105, 1098 XG Amsterdam, Netherlands

Dates

  1. Received 9 December 2012
  2. Accepted 22 February 2013
  3. Published

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1748-0221/8/04/P04004

Abstract

The extreme radiation dose received by vertex detectors at the Large Hadron Collider dictates stringent requirements on their cooling systems. To be robust against radiation damage, sensors should be maintained below -20°C and at the same time, the considerable heat load generated in the readout chips and the sensors must be removed. Evaporative CO2 cooling using microchannels etched in a silicon plane in thermal contact with the readout chips is an attractive option. In this paper, we present the first results of microchannel prototypes with circulating, two-phase CO2 and compare them to simulations. We also discuss a practical design of upgraded VELO detector for the LHCb experiment employing this approach.

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10.1088/1748-0221/8/04/P04004