1. Recent Progress in No-Insulation REBCO Magnet
Seminar Invitation
Recent Progress in No-Insulation REBCO Magnet
Abstract
To date >100 no-insulation (NI) REBCO test coils and >20 magnets have been designed, built, and successfully tested. They are substantially more compact, often <1/3 the radial build of their insulated counterparts, mainly due to their large operating current densities. More important, all the NI coils and magnets have shown the so-called self-protecting feature at both 4.2 K and 77 K. The results demonstrate a strong potential of the NI technique for compact and reliable high field HTS magnets, possibly >45 T. Yet, multiple engineering issues still need to be resolved for application of the NI technique to actual user magnets, which include: 1) charging delay, a well-known drawback of the NI technique, and consequent non-linear magnet constant; 2) lack of user experience even at a low field; 3) safe post-quench behavior of multi-coil magnets; 4) fatigue and degradation, especially after multiple quenches; 5) effectiveness of several approaches for mitigation of the screening-current-induced fields, particularly important for NMR/MRI. This seminar intends to provide an overview of the recent progress in the NI HTS magnet R&D including the latest 11 T NI-REBCO insert that generated a combined field of 42.5 T at a coil current density of 1150 A/mm2 in the bore of the 31 T resistive background magnet (Cell 7) at the National High Magnetic Field Laboratory. The seminar also anticipates the future of the NI-REBCO technology in expectation of advancing the state-of-the-art in the high field magnet technology.
Acknowledgement
This work was supported by the National High Magnetic Field Laboratory (which is supported by the National Science Foundation under NSF/DMR ), and by the State of Florida.
Speaker: Prof. Seungyong Hahn (Seoul National University)
Date: April 25, 2017 (Tuesday)
Time: 11:00 am
Venue: Seminar Room, Creation Hall (3F), KAIST Munji Campus
Contact: 042) (CAPP Administration Office)
Hosted by
Note: Light Refreshments will be provided (다과제공) !!!
Poster Image from NASA/CXC/Caltech/P.Ogle et al; Optical: NASA/STScl; IR: NASA/JPL-Caltech; Radio: NSF/NRAO/VLA
Poster Image from NASA/CXC/Caltech/P.Ogle et al; Optical: NASA/STScl; IR: NASA/JPL-Caltech; Radio: NSF/NRAO/VLA