Title :
Progress in the design and study of a superferric dipole magnet for the GSI fast-pulsed synchrotron SIS100
Author :
Kovalenko, Alexandre D. ; Agapov, Nicolai N. ; Aksenov, Vladimir G D ; Karpunina, Irina E. ; Khodzhibagiyan, Hamlet G. ; Kuznetsov, Grigori L. ; Voevodin, Michail A. ; Moritz, Gebhard ; Fischer, Egbert ; Hess, Guenter ; Muehle, Carsten
Author_Institution :
Joint Inst. for Nucl. Res., Dubna, Russia
fDate :
6/1/2004 12:00:00 AM
Abstract :
New experimental results from the investigation of a superferric window frame type dipole magnet with the operating parameters: B=2T, dB/dt=4T/s and pulse repetition rate f=1Hz are presented. The magnet SC coil is made from a hollow multifilamentary NbTi cable, cooled with two-phase helium flow. Special attention is devoted to minimization of AC power losses in the magnet to the specified value of 13W/m. The value of 9W/m has been obtained for a model magnet with the yoke at T=50K. Different possibilities were investigated to reduce the losses in the case of a cold iron yoke (T=4.5K). Other problems, connected with the magnetic field quality, mechanical and cryogenic stability of the magnet under SIS100 operating conditions are also discussed.
Keywords :
accelerator magnets; losses; multifilamentary superconductors; niobium alloys; superconducting cables; superconducting magnets; synchrotrons; 1 Hz; 4.5 K; 50 K; AC power losses; GSI; NbTi; SIS100 fast pulsed synchrotron; cold iron yoke; cryogenic stability; fast-cycling synchrotron; helium flow; hollow multifilamentary NbTi cable; magnet SC coil; magnet model; magnetic field quality; mechanical stability; operating parameters; pulse repetition rate; superconducting fast ramped dipole magnet; superferric dipole magnet; Coils; Cryogenics; Helium; Iron; Magnetic fields; Magnetic losses; Niobium compounds; Superconducting cables; Synchrotrons; Titanium compounds; AC power losses; fast-cycling synchrotron; superconducting fast ramped dipole magnet;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.829112
