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Microchannel cooling for the LHCb VELO Upgrade I

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arxiv 2112.12763 v1 pith:GZEELCY3 submitted 2021-12-23 physics.ins-det hep-ex

Microchannel cooling for the LHCb VELO Upgrade I

Oscar Augusto De Aguiar Francisco , Wiktor Byczynski , Kazu Akiba , Claudia Bertella , Alexander Bitadze , Matthew Brock , Bartosz Bulat , Guillaume Button
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Jan Buytaert Stefano De Capua Riccardo Callegari Christine Castellana Andrea Catinaccio Catherine Charrier Collette Charvet Victor Coco Paula Collins Jordan Degrange Raphael Dumps Diego Alvarez Feito Julian Freestone Mariusz Jedrychowski Vinicius Franco Lima Abraham Gallas Wouter Hulsbergen Daniel Hynds Gonzalo Arnau Izquierdo Pawel Jalocha Eddy Jan Malcolm John Nathan Jurik Alexander Leflat Edgar Lemos Cid Rolf Lindner Alessandro Mapelli Jerome Noel Andrei Nomerotski Rui de Oliveira Martijn van Overbeek Chris Parkes Paolo Petagna Alexandre Porret Denis Renaud Erno Roeland Giulia Romagnoli Eric Rouchouze Krista de Roo Freek Sanders Thomas Schneider Heinrich Schindler Burkhard Schmidt Andreas Schopper Luke Scantlebury-Smead Miranda Van Stenis Peter Svihra Benoit Teissandier Jean-Francois Teissier Xavier Thery Eric Thomas Bart Verlaat
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classification physics.ins-det hep-ex
keywords microchannelthermalcoolersassemblycompletedcoolinglhcbproduction
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The LHCb VELO Upgrade I, currently being installed for the 2022 start of LHC Run 3, uses silicon microchannel coolers with internally circulating bi-phase \cotwo for thermal control of hybrid pixel modules operating in vacuum. This is the largest scale application of this technology to date. Production of the microchannel coolers was completed in July 2019 and the assembly into cooling structures was completed in September 2021. This paper describes the R\&D path supporting the microchannel production and assembly and the motivation for the design choices. The microchannel coolers have excellent thermal peformance, low and uniform mass, no thermal expansion mismatch with the ASICs and are radiation hard. The fluidic and thermal performance is presented.

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