Closed-cycle Joule-Thomson (JT) cryocoolers have been developed at National Metrology Institute of Japan (NMIJ)/National Institute of Advanced Industrial Science and Technology (AIST) with the aim of realizing a liquid-helium-free calibration apparatus for cryogenic thermometers between 0.65 K and 25 K. The latest JT cryocooler at NMIJ/AIST consists of a JT cooling circuit and a pulse tube mechanical refrigerator. The characteristics of the apparatus including a residual gas analysis of the JT cooling circuit are presented in this paper. Currently the initial cool-down is performed using a heat-exchange gas. It normally takes about 30 h to reduce the temperature from room temperature to 5 K at the thermometer comparison block of the apparatus. The correct timing of the removal of the heatexchange gas is important for the efficient operation of the apparatus. Incomplete removal of the heat-exchange gas induces excess heat load on the apparatus and thermal disturbances. Some examples of abrupt temperature bursts are discussed in this paper. Mechanical refrigerators generate cyclic mechanical vibrations, and precision resistance thermometers are usually very sensitive to a mechanical vibration. The measured vibration level of the developed apparatus is reported. The damage to the apparatus due to the magnitude 9.0 earthquake on March 11, 2011, and possible countermeasures in the case of future earthquakes are also discussed.
Skip Nav Destination
Article navigation
11 September 2013
TEMPERATURE: ITS MEASUREMENT AND CONTROL IN SCIENCE AND INDUSTRY, VOLUME 8: Proceedings of the Ninth International Temperature Symposium
19–23 March 2012
Los Angeles, California
Research Article|
September 11 2013
Characteristics of a liquid-helium-free calibration apparatus for cryogenic thermometers
T. Shimazaki
T. Shimazaki
National Metrology Institute of Japan, AIST, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563,
Japan
Search for other works by this author on:
AIP Conf. Proc. 1552, 162–167 (2013)
Citation
T. Shimazaki; Characteristics of a liquid-helium-free calibration apparatus for cryogenic thermometers. AIP Conf. Proc. 11 September 2013; 1552 (1): 162–167. https://doi.org/10.1063/1.4819533
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
24
Views
Citing articles via
Inkjet- and flextrail-printing of silicon polymer-based inks for local passivating contacts
Zohreh Kiaee, Andreas Lösel, et al.
Design of a 100 MW solar power plant on wetland in Bangladesh
Apu Kowsar, Sumon Chandra Debnath, et al.
Effect of coupling agent type on the self-cleaning and anti-reflective behaviour of advance nanocoating for PV panels application
Taha Tareq Mohammed, Hadia Kadhim Judran, et al.
Related Content
Interpolating Gas Thermometer for Realizing the ITS‐90 at NMIJ/AIST
AIP Conference Proceedings (September 2003)
Realizations of the ITS-90 below 24.5561 K at NMIJ/AIST
AIP Conference Proceedings (September 2013)
Realization of the 3He Vapour‐Pressure Temperature Scale at NMIJ/AIST
AIP Conference Proceedings (September 2003)
New Sealed Cells for Realization of Cryogenic Fixed Points at NMIJ/AIST
AIP Conference Proceedings (September 2003)
Radiation thermometry standards at NMIJ from −30 °C to 2800 °C
AIP Conference Proceedings (September 2013)