Conveners
Thu-Mo-Po4.09 - Joints Between Superconductors
- Shintetsu Kanazawa (Muroran Institute of Technology)
- Jun Lu (FSU/NHMFL)
The joint between two RE123-coated conductors with crystalline joint by melted bulk (CJMB) method [1, 2] has been developed for NMR and MRI. In this method, a Yb123 sheet is used between the coated conductors as a superconducting intermedium. We reported that a superconducting joint with critical current of 21.2 A at 77 K was obtained, and the persistent coil has a low resistance about 1 pΩ in...
Superconducting joints are extremely important for the application of HTS magnets. Recently, various joint techniques have been proposed for connection between HTS conductors. However, suitable evaluation methods for joint resistance (R$_j$) have not been established. We have developed a joint resistance evaluation system [1]. The system consists of an HTS sample with a joint, a current...
Various types of coated conductor (CC) joints are required due to current CC tapes fabrication limited lengths and for their coil applications in high field magnets. It is essential that some CC joint fundamentals, including joint resistance, must be a consideration in dealing with such application designs. Also, joint requirements must meet both the conditions of good electrical and...
The low melt temperature REBa2Cu3O7-δ (LMT RE123, RE=Yb, Er, etc.), a candidate of the joint materials, is essential to acquire superconducting joint of the 2nd HTS tape, which could be used in extreme high field NMR (≥25T). In this paper, two LMT RE123 materials have been synthesized. The synthesis parameters have been optimized to obtain RE123 materials with high superconducting properties....
A novel Nb3Sn superconducting jointing method by means of powder metallurgy was presented to reduce the resistance for purpose of satisfactory magnetic field stability of high field NMR instrument. In this research, Nb, Sn and Cu element powders were introduced in ball milling processing to prepare the (Cu, Sn) solid-solution before pressing and sintering. The A – 15 type Nb3Sn phase was...
A superconducting joint technique has been extensively investigated to operate magnetic resonance imaging systems in persistent current mode, which enables a high-resolution level of the magnetic field. We have presented the MgB2 superconducting joint with unreacted MgB2 wires that demonstrate the feasibility of the joint technique to be utilized for the MgB2 MRI magnet development. However,...
