Title :
Superconducting magnet system for high power gyrotron
Author :
Konno, M. ; Yasukawa, Y. ; Sakaki, K. ; Kumagai, T. ; Hiue, H. ; Tsuneoka, M. ; Maebara, S. ; Kasugai, A. ; Yoshida, K.
Author_Institution :
Fuji Electr. Co. Ltd., Tokyo, Japan
fDate :
3/1/1993 12:00:00 AM
Abstract :
A superconducting magnet system was designed and fabricated for a 1-MW gyrotron in a frequency range of 110-140 GHz. The system consists of superconducting magnets, a cryostat, a two-stage cooler, and power supplies. The diameter of the gyrotron bore is 220 mm. A magnetic field of 5.0 T in the resonance region was obtained with a 340-mm bore superconducting split coil. A magnetic field of 0.25 T in the gun region was obtained with two solenoid coils. A persistent current switch, removable current leads, and a two-stage cooler were adopted to decrease the heat load of liquid helium. The superconducting magnet system has successfully achieved a 110% rated current without quenching.<>
Keywords :
fusion reactor theory and design; gyrotrons; niobium alloys; plasma heating; superconducting magnets; titanium alloys; 0.25 T; 1 MW; 110 to 140 GHz; 220 mm; 340 mm; 5 T; NbTi; RF wave energy; cryostat; current leads; current switch; electron beam; electron cyclotron system; fusion machine; fusion plasma; heat load; high power gyrotron; magnetic field; plasma heating; power supplies; resonance region; solenoid coils; superconducting magnet system; superconducting split coil; two-stage cooler; Boring; Frequency; Gyrotrons; Magnetic fields; Magnetic resonance; Power supplies; Solenoids; Superconducting coils; Superconducting magnets; Switches;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
