Journal
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume 24, Issue 3, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASC.2013.2285785
Keywords
Critical current; cryocooler; Penning trap; resistance; superconducting joint; test
Funding
- National Natural Science Foundation of China [91026001, 10627504, 10675147, 10221003]
- Major State Basic Research Development Program of China [2007CB815000]
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A helium-free superconducting joints test system based on a 1.5 W GM cryocooler has been built in the Institute of Modern Physics, CAS. The resistance and the critical-current of a joint at a particular magnetic field and a particular temperature can be measured synchronously. This system consists of a device on the second stage of the cryocooler and an instrumentation system. The basic method of this system is inductive technique and the current-decay method. The main components of the device include a drive coil, a sample holder, and a background magnet. The measurement process is operating by a LabView program. It has been used to test the NbTi wire joints of the Lanzhou penning trap magnet; it seems reliable and convenient. The principles of main design and some results are presented in this paper.
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