A high-performance wave guide cryogenic thermal break

S. J. Melhuish, M. A. McCulloch, L. Piccirillo, C. Stott
2016 Review of Scientific Instruments  
We describe a high-performance wave guide cryogenic thermal break. This has been constructed both for Ka band, using WR28 wave guide, and Q band, using WR22 wave guide. The mechanical structure consists of an hexapod (Stewart platform) made from pultruded carbon fibre tubing. We present a tentative examination of the cryogenic Young's modulus of this material. The thermal conductivity is measured at temperatures above the range explored by Runyan and Jones, resulting in predicted conductive
more » ... cted conductive loads through our thermal breaks of 3.7 mW to 3 K and 17 µK to 1 K.
doi:10.1063/1.4964475 pmid:27802747 fatcat:sjwe7bk6ynh43dfiunozemeaam