A high-performance wave guide cryogenic thermal break

We describe a high-performancewave guidecryogenic thermal break. This has been constructed both for Ka band, using WR28wave guide, and Q band, using WR22wave guide. The mechanical structure consists of a hexapod (Stewart platform) made from pultrudedcarbon fibre tubing. We present a tentative examination of thecryogenic Young ’s modulus of this material. Thethermal conductivity ismeasured attemperatures above the range explored by Runyan and Jones, resulting in predictedconductive loads through our thermal breaks of 3.7 mW to 3 K and 17 μK to 1 K.

Source: Review of Scientific Instruments - October 12, 2016 Category: Physics Authors: S. J. Melhuish, M. A. McCulloch, L. Piccirillo and C. Stott Source Type: research