August 27, 2017 to September 1, 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Ultra-high field HTS flux-pumped magnets

Aug 29, 2017, 1:15 PM
1h 45m
Posters Area

Posters Area

Poster Presentation of 1h45m H2 - Power Supplies and Flux Pumps Tue-Af-Po2.11


Dr Tim Coombs (University of Cambridge)


Flux pumped ultra-high field magnets have the potential to produce fields which surpass the nearly 20 year old record of 45 T in a DC field Bitter magnet in a relatively cost effective manner. These higher fields will undoubtedly require superconducting cables capable of carrying thousands of amps and the means to deliver those very high currents. Current leads could be used but at currents in the 10s of thousands of amps they represent a very high cost and heating overhead. Higher currents mean lower conductor cost, lower magnet inductances shorter charging times and lower quench voltages. Flux pump technology and the latest dynamic bridge switching method will be key to providing these high currents with minimal heat loads and minimal infrastructure in comparison to expensive high-current power supplies and warm-to-cold current leads. The resultant effect is that the purchase and running costs of high-field magnets will decrease substantially. Crucially also infra-structure costs will be slashed. A flux pumped HTS magnet does not require high current power supplies and current leads neither does it require copious amounts of water cooling to dissipate the waste heat. Thus it is realistic to expect HTS flux pumped magnets to be available which could be installed in any UK (or international) university enabling a radical sea change in the use of high field magnets to support research. Further down the line it is conceivable that HTS flux pumped magnets could enable the creation of practical fusion devices a goal which has eluded us for many years.

Submitters Country United Kingdom

Primary author

Dr Tim Coombs (University of Cambridge)


Jianzhao Geng (University of Cambridge) chao li (University of Cambridge) J.D.D. Gawith

Presentation materials