Journal article

Publication year: 2022

Journal: Cryogenics

Volume number: 122

ISSN: 0011-2275

eISSN: 1879-2235

DOI Link: https://doi.org/10.1016/j.cryogenics.2021.103417

Publisher: Elsevier

Abstract: 
Optimizing the design of a two-stage Pulse Tube Cryocooler (PTC) usually affects its geometry and regenerator filling. Here, this is demonstrated based on a recently developed small scale two-stage PTC, driven by a 1 kW Helium compressor with an initial base temperature of 5 K. The improvements are aimed at reducing the minimum temperature and maximizing the cooling performance around 4.2 K. By resealing the geometry, while keeping the overall length constant, and implementing Gd2O2S (GOS) in the regenerator filling, the coefficient of performance (COP) can be doubled from 7 x 10(-5) to 1.5 x 10(-4). The simulations generated with the software Sage agree with the experimental results and describe the cooling performance accurately down to 4.2 K. This demonstrates that such simulations are important to optimize PTCs around liquid Helium temperatures.

Harvard Citation style: Schmidt, J., Schmidt, B., Dietzel, D., Falter, J., Thummes, G. and Schirmeisen, A. (2022) Improvement strategies for a low input power 4 K pulse tube cooler: Experiments and sage simulations, Cryogenics, 122, Article 103417. https://doi.org/10.1016/j.cryogenics.2021.103417

APA Citation style: Schmidt, J., Schmidt, B., Dietzel, D., Falter, J., Thummes, G., & Schirmeisen, A. (2022). Improvement strategies for a low input power 4 K pulse tube cooler: Experiments and sage simulations. Cryogenics. 122, Article 103417. https://doi.org/10.1016/j.cryogenics.2021.103417