Radiation hard, micro-engineering solutions for thermal management in high energy physics and space applications Diego Alvarez Feito, Julien Bonnaud, Enrico Chesta, Alessandro Mapelli Michel Despont Grégoire Bourban, Volker Gass

Mar Capeans

Mar Capeans

Irradiation Facilities Federico RAVOTTI The team operates and maintains: Proton Irradiation Facility (IRRAD) @ PS-EA Gamma Irradiation Facility (GIF++) @ SPS-NA Support users in planning / executing irradiations dosimetry meas., samples handling, transport, etc. Organize irradiations in facilities outside CERN Develop Radiation Monitoring devices for HEP Involved in AIDA-2020 project & FCC Study GIF++ Beam momentum: 24 GeV/c Beam spot: 12×12 mm2 (FWHM) Proton flux: ~1016 p/cm2 in 5 days Task 15.2 IRRAD infrastructure/systems upgrade GIF++ gas system upgrade Transnational access program p+ IRRAD Zone 2 p+ IRRAD Zone 1 Special Technol. WP11 Development of Radiation Sensors for ultra-high dose levels IRRAD RADMON sensor for HEP Experiments (>250 units delivered)

DT Composite laboratory Area of 145 m² dedicated to composite activities Semi clean room for composite lay-up New autoclave (Tmax= 250°C, Pmax= 10bars) VRTM process (Vacuum Resin Transfer Molding) Characterization room (chemical dissolution and microscopic observation) Involved in many projects (CMS, CLIC, ATLAS, LHCb …) Tracker inner prototype for CLIC experiment UT Box prototype for LHCb experiment New autoclave 2.5m x 1m VRTM process Chemical dissolution bench Semi-clean Room

QART Lab: Quality Assurance and Reliability Testing Laboratory Alan HONMA, Florentina MANOLESCU, Ian McGILL, Julien BONNAUD

Thermal Management in HEP and Space Applications Dissipate heat generated by electronics Extend service-life of components Vacuum + Radiation Silicon embedded microchannel cooling (e.g. NA62 GTK) Cooling Plant Connection to main cooling circuit is challenging In 2014, we pioneered the use of silicon microchannels for the

Project Objective Miniaturised closed loop device operated in stand-alone mode Eliminate connectors Integrated Loop Heat Pipe in cooling plate The full cooling circuit would be integrated in a silicon device the size of which is similar to that of the component to be cooled (i.e.“the cooling plant would be integrated in the silicon plate”). Advantages: Absence of fragile interconnections Absence of long distribution lines/cooling plant (stand-alone option) Minimal maintenance Cost-effective and easy to replace

Miniaturising Loop Heat Pipes www.nasa.gov Satellite thermal control loop heat pipe (www.1-act.com) Fujitsu Ultra-thin heat pipe (www.semimd.com) To be commercialised in 2017 Potential applications: Detector cooling in fixed target HEP experiments. Cooling in silicon tracking detectors (in stand alone mode or coupled with a secondary cooling line – without exchange of cooling fluid). Cooling of electronic components or physics detectors embarked in space missions. (In space, it would open the door to cooling at the component level rather than the system level approach currently followed ). Cooling applications in high performance computing and/or electronic devices (high power densities to be dissipated in confined spaces).

Joint PhD Programme The various areas of expertise and the facilities required for the success of the project would be covered by the different partners. EP-DT to make available its manufacturing and testing facilities and to provide technical supervision and expertise. This would be the pilot project for the new collaboration agreement with SSC (to be ratified in June 2016). Potential benefits for CERN: Improvement and widen the potential use of an existing technology (i.e. embedded microchannel cooling ) for detector cooling in HEP. Collaboration with leading institutions in the aerospace field, which share common problems with CERN in the area of heat management. Visibility (particularly if the solution get adopted by ESA for a future space mission).

Research Plan Familiarisation with the current technologies available in HEP and space applications and selection of the most promising technique to meet the requirements of both fields. Design of a test vehicle to validate the approach and address potential commercial partners. Manufacturing, characterisation and validation of the test vehicle. Production of full-size demonstrators suitable for a specific HEP experiment at CERN and for a future space mission.