Title :
Quench detection of superconducting magnets using ultrasonic wave
Author :
Ninomiya, A. ; Sakaniwa, K. ; Kado, H. ; Ishigohka, T. ; Higo, Y.
Author_Institution :
Seikei Univ., Musashino, Japan
fDate :
3/1/1989 12:00:00 AM
Abstract :
An ultrasonic quench-detection method for superconducting magnets is presented. This nondestructive method monitors the change of the acoustic transfer function of a superconducting magnet induced by a local temperature rise or an epoxy crack. Experiments were carried out on a small epoxy-impregnated magnet. The experimental results show that a local temperature rise of about 2-3 K can be detected by this method. It is concluded that the technique can provide early quench warning by monitoring continuously the change of the acoustic transfer function of the magnet
Keywords :
superconducting magnets; ultrasonic materials testing; acoustic transfer function; epoxy crack; epoxy-impregnated magnet; local temperature rise; nondestructive method; quench warning; superconducting magnets; ultrasonic quench-detection; ultrasonic wave; Acoustic signal detection; Magnetic materials; Monitoring; Shape; Superconducting magnets; Temperature; Transducers; Transfer functions; Ultrasonic imaging; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
