Speaker
Marc Wenskat
Description
Stable operation of a cavity generally requires Joule-heating, generated in its walls, to be conducted to an outer helium bath. Therefore, it is of interest to experimentally evaluate how present and future cavity treatments affect thermal characteristics. We present an instrument for measuring the thermal performance of SRF cavity materials at cryogenic temperatures. To get an idea of the instrument’s sensitivity and how standard cavity treatments influence thermal resistance, samples are tested post fabrication, polishing and 800 °C baking. Furthermore, first measurements of the thermal conductance at 2K of SIS coated Nb samples and of Nb3Sn coated Nb samples are presented.
