A 2.5 T, 1.25 m Free Bore Superconducting Magnet for the Magnum-PSI Linear Plasma Generator

TitleA 2.5 T, 1.25 m Free Bore Superconducting Magnet for the Magnum-PSI Linear Plasma Generator
Publication TypeJournal Article
Year of Publication2018
AuthorsH.JN van Eck, H.HJTen Kate, A.V Dudarev, T. Mulder, A. Hervé
JournalIEEE Transactions on Applied Superconductivity
Volume28
Issue3
Pagination4203305
Abstract

DIFFER's main experiment Magnum-PSI is the only laboratory setup in the world capable of exposing materials to plasma conditions similar to those of future fusion reactors. The success of the Magnum-PSI experiment depends on the generation of a 2.5 T magnetic field without restricting the diagnostic access and operational aspects of the experiment. This has been achieved with a magnet consisting of five superconducting solenoids wound on a 2.5 m long stainless steel coil former positioned in a cryostat offering a 1.25 m warm bore. A copper stabilized multifilamentary NbTi conductor with a 3.48 mm 2 cross section has been used, thus the magnet exhibits a total inductance of 500 H and a stored energy of 16 MJ. This presents quite a challenge for the protection scheme that has been implemented using a mix of back-to-back cold diodes and external dump resistors. The coils generate a plateau shaped magnetic field adjustable up to 2.5 T while the distance between the coils allows for 16 room temperature view-ports. The coils are cooled with liquid helium using a re-condensing system operated with cryocoolers, while the magnet system cycles between zero and full field up to once per day.

DOI10.1109/TASC.2017.2779510
Division

PSI

Department

PSI-FI

PIDe9ae6bfca877eadb4c996610b6d3aab9
Alternate TitleIEEE Trans. Appl. Supercond.
LabelOA
Attachment: 

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