Journal
CRYOGENICS
Volume 58, Issue -, Pages 62-67Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cryogenics.2013.09.011
Keywords
Persistent joints; Current decay measurement method; Cold-pressing welding; Flux creep; Magnetization relaxation
Categories
Funding
- National Natural Science Foundation of China [50925726, 10755001]
- Instrument Program in MOST
Ask authors/readers for more resources
The cold-pressing welding method is employed to fabricate persistent joints between NbTi multifilamentary conductors, and a series of persistent joints are thus made at different mechanical pressures. The electrical properties of these persistent joints are tested by a joint resistance measurement device based on the current decay measurement method. Test results show that the cold-pressing welding method is reliable and applicable to NMR and MRI applications. Experiment results also shows that the joint resistances and current-carrying capacities of the joints seem to have no apparent relevance to the mechanical pressure in a wide range of 4-20 MPa, but the current decay ratio due to flux creep has obvious relevance to the mechanical pressure. Further research is needed to advance this joint manufacturing technology. Besides, measured current increase under 1 T background magnetic field is observed and explained, which has a reference meaning for testing persistent joint resistances. (C) 2013 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available