Title :
Design, manufacture, and test of a large bore cryogen-free magnet
Author :
Hobl, Achim ; Krischel, Detlef ; Poier, Michael ; Albrecht, Ruediger ; Bussjaeger, Ralf ; Konopka, Uwe
Author_Institution :
ACCEL Instruments GmbH, Bergisch Gladbach, Germany
fDate :
6/1/2003 12:00:00 AM
Abstract :
A large superconducting cryogen-free magnet has been designed, manufactured and tested. The magnet reached 4.1 T in the 430 mm room temperature bore with a ramp time of 35 min. The magnet is cooled by a two-stage GM cryocooler. The magnet can be rotated on a support frame to be operated with either horizontal or vertical bore. The stored energy of 1 MJ can safely be handled during a quench. Homogeneity, cool down as well as quench properties confirmed the design values. The magnet is now being operated by the end user.
Keywords :
superconducting magnets; 1 MJ; 35 min; 4.1 T; 430 mm; cool down; energy storage; homogeneity; large-bore superconducting cryogen-free magnet; quench properties; ramp time; support frame; two-stage Gifford-McMahon cryocooler; Boring; Cooling; Copper; Magnetic fields; Manufacturing; Superconducting coils; Superconducting filaments and wires; Superconducting magnets; Temperature; Testing;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812776
