| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1507947 | Cryogenics | 2010 | 9 Pages |
Abstract
A cryogen-free cold source for temperature below 6Â K without mechanical, thermal and electromagnetic perturbations would be welcome in many sensitive applications. This article describes such a device (Energy Storage Unit-ESU) built to store 36Â J between 3Â K and 6Â K. This ESU consists of a solid state enthalpy reservoir connected to a cryocooler by a heat switch. Its different parts as well as the experimental results are presented. The choice of Gd2O2S (GOS) as high specific heat solid material for the enthalpy reservoir is discussed. Tests in different conditions were performed. A very good agreement was found between the experimental data and those predicted using the heat switch characteristics and the specific heat measurements of the GOS used in this experimental set-up. A stable 6Â K temperature was maintained during more than 50Â min in a completely silent environment. A semi-continuous operation for this cold source was successfully tested during 2.5Â h.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
I. Catarino, J. Afonso, D. Martins, M. Linder, L. Duband, G. Bonfait,