Dilution Refrigerator Model JDR-500 from Janis Research

Model JDR-500
Dilution Refrigerator

April 2005

Janis Research Company introduces our newest model ³He-⁴He dilution refrigerator - the JDR-500 After developing the JDR-100 dilution refrigerator with a cooling power of approximately 150 µW at 100 mK, we have just finished building and testing the model JDR-500. During its first test this refrigerator delivered a cooling power of 400 µW at 100 mK at maximum circulation rate, and an ultimate temperature of 8 mK at optimal circulation rate. The first photo below shows the JDR-500 suspended from the 4 K flange of the vacuum can. The third graph below shows the cooling power as a function of various circulation rates. The temperature scale was established by calibrating a Janis CMN thermometer against AuIn₂, AuAl₂, Ir and Be superconducting fixed points.


Model JDR-500 Dilution Refrigerator (l-r) suspended from the 4 K flange of the vacuum can; JDR-500 stage; bottom view Click on the photos for larger images.
Move your mouse over the links below to view each graph. Click on the links below to view each graph in a new window.
JDR-500 Superconduction Transitions in FPD1 Cooling kinetics of JDR-500 at optimal circulation rate of 150 µmole/sec Cooling power measurement of JDR-500 at optimal circulation rate of 150 µmole/sec JDR-500 cooling power

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JANIS RESEARCH COMPANY, INC.
2 Jewel Drive, P.O. Box 696
Wilmington, MA 01887-0696 USA
TEL: +1-978-657-8750 FAX: +1-978-658-0349
E-Mail: sales@janis.com
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Model JDR-500 Dilution Refrigerator (l-r) suspended from the 4 K flange of the vacuum can; JDR-500 stage; bottom view Click on the photos for larger images.

Model JDR-500 Dilution Refrigerator
(l-r) suspended from the 4 K flange of the vacuum can;
JDR-500 stage; bottom view
Click on the photos for larger images.