Cryogen free dilution refrigerator for astronomy

Aug. 18, 2010 - PRLog -- Janis Research has successfully tested a JDry-100-ASTRA cryogen free 3He-4He dilution refrigerator, which has an ability to work in a wide range of tilting angles -20 to 53 degrees from vertical, providing cooling power to a novel type of sensor for cosmic microwave background studies.

The system employs a power-savvy and quiet pulse tube cryocooler with remote distribution valve. It takes only 40 hours to cool to the base temperature of 15 mK thanks to a common vacuum space and efficient mechanical heat-switch design.

The current system has a measured cooling power of 120 microwatts at 100 mK with a single mechanical vane pump, and can be upgraded to an automated gas handling system, Janis model GHS2, equipped with a more powerful oil-free hermetic 6-stage Roots pump. This upgrade insures full remote control of the cooling process, as well as higher cooling power.

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Janis Research is a manufacturer of cryogenic research equipment. Products include continuous flow and Helium-3 cryostats, 4 K and 10 K cryocoolers, dilution refrigerators, superconducting magnet systems, and micromanipulated probe stations.

For information: http://www.janis.com/JDry-100-ASTRA.aspx or
Contact: Zuyu Zhao, Ph.D. at zzhao@janis.com
Phone: +1 978-657-8750, press 8 then 121.