Cryogenic Division, one of the four divisions of Research Facility Center for Science and Technology, is entrusted with a mission to make a support of cryogenic research in the university. Specifically, there are two missions of supplying cryogen of liquid nitrogen and helium and of offering cryogenic experimental facilities for common use.
Specific missions of Cryogenic Division are the following.
1. Supply of cryogen
Cryogenic Division supplies liquid nitrogen and helium to many users in the university. The recycling system is installed for the supply of liquid helium; evaporated helium gas after the usage of liquid helium is recovered and recondensed for the next supply. This recycling system contributes much to low cost and stable supply even in the period of short supply of helium in the world.
2. Common facilities for cryogenic experiments
Cryogenic Division is equipped with several cryogenic experimental facilities which are offered for common use. There are facilities for low-temperature measurement of electrical and magnetic properties, an electron microscope, etc.
3. Safety training for using cryogen and high-pressure gas
Cryogenic Division organizes training course for those who begin using cryogen and high-pressure gas.
4. Other services
Cryogenic Division provides a periodic check of liquid-nitrogen containers for users in the university.
The University of Tsukuba Research Facility Center for Science and Technology, Cryogenics Division, is equipped with a helium liquefier and liquid nitrogen CE tank to produce and supply cryogen (4.2K liquid helium, 77K liquid nitrogen).
The in-house consumption of cryogen increases every year and is used not only in the fields of physics, chemistry and engineering, but also in wider fields such as medicine, agriculture and forestry, biology and physical science. Also, the cryogenic department is conducting various studies such as generating strong magnetic fields (19T) using superconductive magnets cooled by liquid helium or cryogenic fields (6mK) by dilution retriggering.
The cryogenic liquefaction building is equipped with systems for supplying cryogen, centered around helium liquefiers, and the experimental building is equipped with various systems for physical testing. The following is a summary.
|Liquefaction building||Helium liquefier Liquid Nitrogen CE tank Helium gas manifold||Cryogenic capacity: 200/h (Taiyo-Sanso, Linde)
16,700 x 1 (Taiyo-Sanso), 9,700 x 1 (Taiyo-Sanso)
For recycled gas 2,880Nm3 (Showa Koatsu)
|Experimental building||Superconductive electromagnet
Susceptibility meter Dilution refrigerator
|Magnetic field: 7T (1.2-300K)
Magnetic field: 19T (1.2-300K)
Mass susceptibility 10-12emu/g (magnetic field over 1T, 2-800K)
Achieving temperature : 6mK, Refrigerating capacity 400μW (100mK)
Division: Cryogenic Division
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