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Related Experiment Video

Updated: Mar 12, 2026

Fabrication and Characterization of Superconducting Resonators

Fabrication and Characterization of Superconducting Resonators

Published on: May 21, 2016

A high-performance wave guide cryogenic thermal break.

S J Melhuish¹, M A McCulloch¹, L Piccirillo¹

¹Jodrell Bank Centre for Astrophysics, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.

The Review of Scientific Instruments

|November 3, 2016

Summary

This summary is machine-generated.

We developed a high-performance waveguide cryogenic thermal break for Ka and Q bands. This innovative design utilizes a carbon fiber hexapod, offering low thermal conductivity for sensitive cryogenic applications.

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A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements

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Published on: July 19, 2016

Area of Science:

Cryogenic Engineering
Materials Science
Waveguide Technology

Background:

Cryogenic thermal breaks are essential components in sensitive scientific instruments operating at low temperatures.
Existing thermal breaks may not meet the stringent requirements for heat load reduction in advanced applications.
Waveguide systems for millimeter-wave frequencies require specialized thermal management solutions.

Purpose of the Study:

To design and construct a high-performance cryogenic thermal break for Ka and Q band waveguides.
To investigate the thermal and mechanical properties of pultruded carbon fiber for cryogenic applications.
To predict the conductive heat loads through the developed thermal breaks at cryogenic temperatures.

Main Methods:

Construction of a cryogenic thermal break using WR28 (Ka band) and WR22 (Q band) waveguides.
Utilizing a hexapod (Stewart platform) mechanical structure made from pultruded carbon fibre tubing.
Measurement of thermal conductivity at cryogenic temperatures and tentative examination of cryogenic Young's modulus.

Main Results:

Successful construction of waveguide cryogenic thermal breaks for Ka and Q bands.
Measurement of thermal conductivity at temperatures above previously explored ranges.
Predicted conductive heat loads of 3.7 mW to 3 K and 17 μK to 1 K through the thermal breaks.

Conclusions:

The developed waveguide cryogenic thermal break demonstrates high performance for sensitive cryogenic applications.
Pultruded carbon fibre is a suitable material for constructing cryogenic mechanical structures, offering low thermal conductivity.
The predicted low conductive heat loads are critical for maintaining stable cryogenic environments in scientific instruments.