A&T Seminar

Cooling of electrically insulated high voltage electrodes down to 30 mK

by Thomas Eisel (CERN)

Europe/Zurich
30/7-018 - Kjell Johnsen Auditorium (CERN)

30/7-018 - Kjell Johnsen Auditorium

CERN

190
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Description
The Antimatter Experiment: Gravity, Interferometry, Spectroscopy (AEGIS) at CERN is an experiment investigating the influence of earth’s gravitational force upon antimatter. To perform precise measurements the antimatter needs to be cooled to a temperature of 100 mK. This will be done in a Penning trap, formed by several electrodes, which are charged with several kV and have to be individually electrically insulated. The trap is thermally linked to a mixing chamber of a 3He-4He dilution refrigerator. The thermal boundary resistance of different thermal link designs will be discussed. In both designs, homemade heat exchangers are integrated to transfer the heat to the cold helium. These heat exchangers are based on sintered structures to increase the heat transferring surface and to overcome the significant influence of the thermal resistance (Kapitza resistance). The heat exchangers are optimized concerning the adherence of the sinter to the substrate and its sinter height, e.g. its thermal penetration length. The performance of the optimized heat exchangers will be presented.
Organised by

H. Burkhardt (BE), S. Sgobba (EN), G. deRijk (TE)