Heat transfer across pressed contacts at low temperatures

✍ Scribed by M. Rechowicz; T. Ashworth; H. Steeple

• Publisher: Elsevier Science
• Year: 1967
• Tongue: English
• Weight: 171 KB
• Volume: 7
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(67)90019-7

✦ Synopsis

MECHANICAL heat switches are of considerable importance in low temperature work, for they often remain the simplest means by which a specimen can be cooled. In an investigation of this type of switch Jacobs and Starr ~ measured the thermal conductance between respective pairs of copper, silver, and gold contacts as a function of contact pressure both at room temperature and at 77 ° K. On the same subject, Berman z has made an extensive study of the conductance between pressed copper to copper contacts for contact forces of up to 136 kg.wt, and he has also studied the relationship between thermal and electrical conductance. The studies of both Jacobs and Starr I and of Berman z have been carried out for contact forces rather larger than those that may be applied in most cryostats. In the present work, however, the forces used are those