Abstract
Superconducting magnets which are installed on a Maglev vehicle vibrate under the influence of various disturbances in running. The main disturbance is due to the harmonic ripples of electromagnetic flux generated by ground coils. To estimate the influence of the harmonic flux ripples, a facility called an electromagnetic vibration simulator was constructed. The heat load in some magnets made in the 1980s increased extremely in the high frequency region of the electromagnetic vibration test. We have investigated the cause of this phenomenon from various aspects, and made short superconducting magnet models containing a single superconducting coil and superconducting magnets with high rigidity having different internal structures for testing various ideas to reduce the heat load. As a result, we have obtained good results. We then started on production of the new superconducting magnets for the Yamanashi test line. This is an outline of the new magnets.
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