Title :
Cryogen free system for the realization of triple points below 90 K
Author :
Levine, P.D. ; Anger, N. ; Jaeger, K.B. ; Mellons, B.
Author_Institution :
Lockheed Missiles and Space Co., Sunnyvale, CA, USA
Abstract :
A system for the realization of thermometric fixed points below 90K based on a closed-cycle He4 refrigerator is described. The goals of the cryostat design, low-temperature operation, instrumentation and data acquisition are explained. The current system is capable of achieving millikelvin (mK) accuracy in fixed-point determination. The significance of fixed-point realization in overall temperature calibration is explained
Keywords :
calibration; cryostats; liquid helium-4; low-temperature techniques; measurement standards; temperature measurement; 90 K; 4He; cryostat design; data acquisition; fixed-point determination; measurement standards; temperature calibration; thermometric fixed points; triple points; Calibration; Cryogenics; Data acquisition; Equations; Instruments; Interpolation; Platinum; Refrigeration; Temperature sensors; Thermodynamics;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1988. IMTC-88. Conference Record., 5th IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/IMTC.1988.10833
