التفاصيل البيبلوغرافية
| العنوان: |
Numerical cooling power predictions for a dilution refrigerator via kinetic modeling. |
| المؤلفون: |
Zilz, Alexander, Tantos, Christos, Day, Christian, Adam, Viktor, Wernsdorfer, Wolfgang |
| المصدر: |
AIP Conference Proceedings; 2024, Vol. 2996 Issue 1, p1-11, 11p |
| مصطلحات موضوعية: |
DILUTION, KINETIC theory of gases, KNUDSEN flow, MAJORANA fermions, HEMODILUTION, GAS flow, VACUUM pumps |
| مستخلص: |
Dilution refrigeration uses circulating 3He to produce cooling by utilizing the properties of 3He-4He mixtures and is the only technology that provides continuous cooling down to several mK. The mixing process of liquid 3He in liquid 4He is endothermic, thus extracting heat from the surroundings. Applications of this apparatus can be found in various fields of applied physics, e.g., research on novel superconductors, the realization of quantum computers, the search for the hypothesized Majorana particle and in the study of other novel quantum properties. In the present work, the flow of 3He gas inside the vacuum pumping system of a dilution refrigerator is simulated and the estimation of the produced cooling power is performed. The 3He gas flow varies from the hydrodynamic regime inside the dilution refrigeration towards the transition regime outside the device and close to the vacuum pumps. Three-dimensional Navier-Stokes calculations have been performed by using appropriate velocity slip boundary conditions. In addition, due to the fact that close to the vacuum pumps the flow is characterized by high Knudsen numbers, a simplified one-dimensional approach based on the kinetic theory of gases has been applied to estimate the importance of the rarefaction effects on the measured flow quantities. The analysis shows that the one-dimensional approach provides results in good agreement (within 10%) with that obtained by the Navier-Stokes calculations. Several aspects of the flow are examined, including the adiabaticity of the solid walls and the gravitational effects. Overall, the current work provides an in-depth modeling analysis of the dilution refrigeration technology as well as useful practical information that can be used for further improvement of the cooling power of these devices. [ABSTRACT FROM AUTHOR] |
|
Copyright of AIP Conference Proceedings is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Find this article in full text from Scitation.