Room temperature to cryogenic electrical interface

Abstract From the Canadian patent

Apparatus is disclosed for electrically interfacing a circuit operable at one temperature with a circuit operable at another temperature, comprising a primary cooling or heating surface disposed inside a vacuum chamber which is thermally connected to the first circuit. Transmission lines may extend through the wall of the vacuum chamber to the second circuit which can be located outside. In one embodiment, the first circuit is operable at cryogenic temperatures and is fabricated on an elongated fused quartz substrate together with the transmission lines. The first circuit may be thermally connected to the primary surface via a secondary surface, which may itself be thermally connected to …