Title :
A Prototype Superconducting Magnet for 170 GHz Gyrotrons
Author :
Surin, Michael I. ; Fix, Aleksander S. ; Keilin, Victor E. ; Kudriavsev, Nikolai I. ; Miklyaev, Sergey M. ; Shevchenko, Sergey A. ; Sokolov, Evgenei V.
Author_Institution :
Kurchatov Inst., Moscow
fDate :
6/1/2006 12:00:00 AM
Abstract :
In the frame of ITER program a prototype superconducting magnet for 170 GHz Gyrotrons was designed, manufactured and tested. The operating field (7.17 T in the center of 219 mm cold bore and 8.1 T at the winding) corresponds to a current of 183.5 A. In the final version of the magnet design the operating field was reached without any training. A specific field distribution along the axis was required with sharp decrease from both sides along the axis. Due to large axial forces a special support structure was used. The subcoils were wound from both Nb3Sn and NbTi multifilamentary graded wires. For quench protection the subcoils were shunted with 16 resistive shunts. A quench transformer type energy extraction system was also implemented in the magnet design. During the tests mechanical disturbances in the subcoils and support structure were observed
Keywords :
gyrotrons; multifilamentary superconductors; niobium alloys; superconducting coils; superconducting device testing; superconducting magnets; tin alloys; titanium alloys; transformers; 170 GHz; 183.5 A; ITER program; Nb3Sn; NbTi; gyrotron; magnet design; mechanical disturbance; multifilamentary graded wire; quench protection; quench transformer type energy extraction system; resistive shunt; subcoil; superconducting magnet; support structure; training; Boring; Gyrotrons; Manufacturing; Niobium compounds; Prototypes; Superconducting magnets; Testing; Tin; Titanium compounds; Wounds; Gyrotrons; superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2006.873344
