SUPERCONDUCTING MAGNET AND OPERATIONAL METHOD OF THE SUPERCONDUCTING MAGNET

• Main Authors: ICHIKI YOTA, AOKI MANABU, TANAKA HIDEKI
• Format: Patent
• Language: English; Japanese
• Published: 31.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

To provide a superconducting magnet capable of promoting to perform maintenance in a period where there is no hindrance in normal operation of the superconducting magnet, and provide an operational method of the superconducting magnet.SOLUTION: A superconducting magnet comprises: a superconducting coil 1 that is arranged to a vacuum insulation container 8; an excitation power supply 3 that excites the superconducting coil; a refrigeration machine 9 that cools the superconducting coil; and an operation control device 50 that controls the excitation power supply and the refrigeration machine. The operation control device comprises: a coil temperature adjustment device 2; a coil voltage measurement device 4; a magnetic field measurement device 5; a magnetic field stable time storage deice 6; and a secure requirement determination device 7, where a temperature of the superconducting coil is changed via the refrigeration machine at a predetermined time, and excites the superconducting coil while measuring a voltage of the superconducting coil and measuring magnetic field strength of the superconducting coil, and a magnetic stable time required for satisfying a desired time stable level in the generation magnetic field of the superconducting coil after the excitation of the superconducting coil by the excitation power supply is stored, and a secure requirement is determined on the basis of a relationship between a coil temperature setting value of excitation at a plurality of times and the magnetic field stable time.SELECTED DRAWING: Figure 1 【課題】超伝導磁石の通常運転には支障がない時期において、メンテナンスを喚起可能な超伝導磁石、および超伝導磁石の運転方法を提供する。【解決手段】真空断熱容器８に配置される超伝導コイル１と、超伝導コイルを励磁する励磁電源３と、超伝導コイルを冷却する冷凍機９と、励磁電源と冷凍機を制御する運転制御装置５０とを備え、運転制御装置は、コイル温度調整装置２、コイル電圧測定装置４、磁場測定装置５、磁場安定時間記憶装置６、保守要否判定装置７を備え、所定の回数、冷凍機を介して超伝導コイルの温度を変え、超伝導コイルの電圧を測定しつつ、超伝導コイルの磁場強度を測定しながら、超伝導コイルを励磁し、励磁電源による超伝導コイルの励磁後から、超伝導コイルの発生磁場が所望の時間安定度を満たすまでに要する磁場安定時間を記録し、複数回の励磁のコイル温度設定値と磁場安定時間との関係に基づき、保守要否を判定する。【選択図】図１