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CO 2 cooling kick-off meeting for the LHCb upgrade

CO 2 cooling kick-off meeting for the LHCb upgrade. May 28, 2014 Burkhard Schmidt. Introduction. C oncept of CO 2 cooling for HEP detectors was first developed at NIKHEF in the year 2000 for the Silicon Tracker of AMS02 and for the LHCb VELO detector.

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CO 2 cooling kick-off meeting for the LHCb upgrade

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  1. CO2 cooling kick-off meetingfor the LHCb upgrade May 28, 2014 Burkhard Schmidt

  2. Introduction • Concept of CO2 cooling for HEP detectors was first developed at NIKHEF in the year 2000 for the Silicon Tracker of AMS02 and for the LHCb VELO detector. • It is based on the 2-Phase Accumulator Controlled Loop (2-PACL) cycle. • CERN PH-DT has put in place a standardized approach to the design of CO2 detector cooling units in close collaboration with NIKHEF.

  3. CO2 cooling for the LHCb upgrade • Due to the strong interplay between the detector design, the requirements for the thermal management, the detector control and safety systems and the design of the cooling plant, close collaboration between cooling experts and detector development groups is mandatory. • Cooling lines are part of the thermal / mechanical support structure design and optimization  The detector performance does not stop at the pipe wall! • This most complex part of the cooling system is often under estimated  Detector cooling is a subject not to be neglected even at the very early stages of detector design

  4. CO2 cooling for the LHCb upgrade • The TDRs for the upgraded VELO detector with micro-channel cooling and the Upstream Tracker have been submitted and are under approval. • It is high time to start more formal collaboration between cooling experts and detector groups. • This is particularly important because we consider the use of a common cooling plant with its back-up for both sub-detectors. • As a first step we must understand better the cooling specifications for each sub-detector and document them.

  5. Scope of PH-DT Cooling activities • Cooling coordination: The ATLAS and CMS cooling coordinators are the link between experiment’s technical coordination and the sub-detectors on one hand and with PH-DT and EN-CV for matters related to detector and infrastructure cooling systems on the other. • Cooling plant development and service: Conduct research and development of CO2 cooling plants (0.1 to 15 kW at present), Plant construction (hardware and control software), maintenance and operation of installed systems in the LHC experiments and their test facilities. • On-detector cooling solutions: i) development of ultra-thin liquid-phase micro-fluidic fabricated silicon devices for the active thermal management of sensors/electronics; ii) development of fibre-optic sensor technologies for strain, temperature and humidity multi-point sensing in dry and highly radioactive tracker environments.

  6. Current responsibilities of the PH-DT Cooling Service • Electrical hardware and control software of a 2 kW unit for the ATLAS IBL. • Full responsibility in the design, construction and operation of 3 x 15 kW units for the Phase I upgrade of the CMS PIX detector. • Coordination of the joint effort between CERN, NIKHEF, Milano, Oxford and Sheffield for the production of 4 prototypes of the 3rd generation of 100 W TRACI CO2 units.

  7. Proposal • Development and construction of a CO2plant for the VELO and UT detectors for the LHCb upgrade, in collaboration between PH-DT and the LHCb detector groups.  Many organizational issues in relation to this proposal need to be sorted out still. • We will do so in parallel to the process of defining the cooling requirements.

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