Lake Shore Cryogenic Accessories

Cryogenic Wire and Cable
Used to minimise heat leak into the sensor and cryogenic system, cryogenic wire has a much lower thermal conductivity (and higher electrical resistivity) than copper wire.
The most common type of cryogenic wire is phosphor bronze. This wire is available in one-, two-, and four-lead configruations. Four-lead configurations are available as Quad-twist (two twisted pairs) or Quad-lead (ribbon). Wire gauge is 32 or 36 AWG, with polyimide or polyvinyl (Formvar®) used to insulate the wires.
Other common cryogenic wires and coaxial cables include manganin, nichrome heater wire, and HD-30 heavy duty copper wire. For high-frequency signals, Lake Shore provides various coaxial cables: ultra miniature coaxial cables and semi-rigid coaxial with a stainless steel centre conductor.

Solder
The most common electrical connections are solder joints. Solder can also be used to install various sensors to improve thermal heat sinking. Common solders are indium solder and 90/10 Pb/Sn. Indium solder is used for various applications including sensor installation to provide excellent thermal contact with the sample. 90/10 Pb/Sn solder is used for applications requring a higher temperature (liquidus point of 575K and solidus point 458K). Ostalloy® 158 solder is used as a seal for demountable vacuum cans and electric feedthroughs in cryogenic systems.

Epoxy and Thermal Grease
Thermal greases and epoxies are used to install and fasten sensors, while providing thermal contact and/or electrical insulation, with the sample. Epoxy can be used for mechanical attachment and joints.
Stycast® 2850FT is composed of a black epoxy resin, and has a thermal expansion coefficient that is matched to copper. A silver-filled, low-temperature conducting epoxy provides excellent strength, along with electrical and thermal conductivity.
Thermal grease, Apiezon N and Apiezon H, is suitable for enhacing thermal contact, especially for sensors inserted into cavities. Apiezon N is for low temperature applications, while H is for high temperature.

Miscellaneous
Lake Shore also suppliers heat sink bobbins, a beryllium heat sink chip, and a four-lead resistance sample holder. Cartridge heaters and vacuum feed through products are also available.

For further information please contact us or read more on Lake Shore's website.