Using Thin-Film Thermometers as Heaters in Thermal Control Applications

A cryogenic sensor maintains calibration at ≈4.2 K to better than 2 mK (<0.5 percent resistance repeatability) after being heated to ≈40 K with ≈0.5 W power. The sensor withstands 4 W power dissipation when immersed in liquid nitrogen with verified resistance reproducibility of, at worst, 1 percent. The sensor maintains calibration to 0.1 percent after being heated with 1-W power at ≈77 K for a period of 48 hours.

When operated with a readout scheme that is capable of mitigating the self-heating calibration errors, this and similar sensors can be used for precision (mK stability) temperature control without the need of separate heaters and associated wiring/cabling.

This work was done by Hyung J. Cho, Konstantin Penanen, Kalyani G. Sukhatme, and Warren A. Holmes of Caltech, and Scott Courts of Lake Shore Cryotronics for NASA’s Jet Propulsion Laboratory. For more information, download the Technical Support Package (free white paper) at www.techbriefs.com/tsp under the Physical Sciences category. NPO-46882

This Brief includes a Technical Support Package (TSP).

Using Thin-Film Thermometers as Heaters in Thermal Control Applications (reference NPO-46882) is currently available for download from the TSP library.

Please Login at the top of the page to download.


White Papers

An Alternative to Check Fixtures
Sponsored by Faro
How Lean Manufacturing Adds Value to PCB Production
Sponsored by Sunstone Circuits
Epoxies and Glass Transition Temperature
Sponsored by Master Bond
Recruit Or Retain Report
Sponsored by Aerotek
Electroforming Basics
Sponsored by Servometer
Avionics Reliability – Thermal Design Considerations
Sponsored by Mentor Graphics

White Papers Sponsored By: