Monitoring system of superconducting magnet introducing fuzzy theorem

For quench detection or the monitoring of a superconducting magnet the authors introduce a fuzzy theorem for a new monitoring system to obtain overall diagnostic information synthesized from a number of fundamental detection items. The present operating condition of a superconducting magnet is given as a numerical amount. This numerical index (dangerous rate) can be used to indicate that the magnet is in dangerous state, and it may be possible to detect a quench very quickly or give an alarm before the quench. The fundamental idea of this method is presented. This method is applied to a superconducting magnet system in the NIFS called the TOKI-MC module coil. Some experimental results show that this method can be used for monitoring large superconducting magnets.<>