Regensburg 2025 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 36: Nanotubes, BEC, Cryocoolers: Poster
TT 36.8: Poster
Wednesday, March 19, 2025, 15:00–18:00, P3
Experimental and Numerical Investigations of the Temperature and Mass Flow Behaviour in the Cold Heat Exchanger of a Single Stage GM-type Puls Tube Cooler — •Elias Eisenschmidt1,3, Jack-Andre Schmidt2,3, Bernd Schmidt2,3, Hardy Weisweiler1,3, and Andre Schirmeisen2,3 — 1Technische Hochschule Mittelhessen, Giessen, Germany — 2Justus-Liebig-University, Giessen, Germany — 3TransMIT-Center for Adaptive Cryotechnology and Sensors, Giessen, Germany
GM-type PTCs play an important role in cooling sensitive electronics. Especially due to the recent developments in quantum computing, low vibration regenerative cooling is needed more than ever. [1]
The refrigeration power is usually calculated using a sinusoidal approximation of the mass flow, temperature and pressure of the working fluid inside a pulse tube cooler. However, several measurements have been carried out to gain insight into the actual time-dependent gas properties. It has been shown that the temperature and pressure curve differ significantly from a sinusoidal assumption. [2]
The goal of this work is to measure the time dependent mass flow and temperature behaviour of the helium gas in the cold end of the cooler, using a RTD and a CTA probe.
[1] Y. Zhai et al., IEEE Trans. Appl. Supercond. 34, May 2024
[2] P. P. Steijaert, Thermodynamical aspects of pulse-tube refrigerators, Technische Universiteit Eindhoven, 1999
Keywords: Pulse Tube Refrigeration