CERN Accelerating science

Article
Title Heat transfer at dielectric - metallic interfaces in the ultra-low temperature range
Author(s) Liberadzka, J (CERN ; Twente U., Enschede) ; Golm, J (CERN) ; Koettig, T (CERN) ; Bremer, J (CERN) ; ter Brake, H J M (Twente U., Enschede)
Publication 2019
Number of pages 5
In: IOP Conf. Ser. Mater. Sci. Eng. 502 (2019) 012133
In: 27th International Cryogenic Engineering Conference - International Cryogenic Materials Conference 2018, Oxford, United Kingdom, 3 - 7 Sep 2018, pp.012133
DOI 10.1088/1757-899x/502/1/012133
Subject category Accelerators and Storage Rings
Accelerator/Facility, Experiment CERN AEgIS
Abstract In the framework of the AEgIS project a series of steady state and dynamic heat transfer measurements at ultra-low temperatures was conducted in the Central Cryogenic Laboratory at CERN. Two sandwich setups, simulating the behaviour of ultra-cold AEgIS electrodes, were investigated and compared, namely: a sapphire − indium − copper and a sapphire − titanium − gold − indium − copper sandwich. The total thermal resistivity of both sandwich setups was evaluated as a function of the influence of normal and superconducting thin layers and multiple dielectric − metallic interfaces in terms of Kapitza resistance. The resulting limitations of the electrode’s design are presented.
Copyright/License CC-BY-3.0

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