Superconducting aluminum heat switch and plated press-contacts for use at ultralow temperatures.
Rev Sci Instrum
; 49(4): 515, 1978 Apr.
Article
em En
| MEDLINE
| ID: mdl-18699137
ABSTRACT
We have measured the thermal conductivity of a 0.1-mm-thick Al foil in the normal and superconducting state down to 58 mK. At this temperature, our data give a ratio for the conductivities of k(n)/k(s)=1600 T(-2). They show that Al is a better material for a heat switch than the usually used superconductors because of its large k(n) and large Debye temperature (reducing the lattice conductivity k(s)). In addition, we describe the design of a heat switch and an excellent performing demountable press-contact between Al and Cu, both gold plated, as joint to the switch.
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MEDLINE
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Termografia
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Alumínio
Idioma:
En
Ano de publicação:
1978
Tipo de documento:
Article