Tohoku University

Other

Mitsuhiro Motokawa

Kazuo Watanabe

Naoyuki Kitamura

Satoshi Awaji

Masaki Makihara

Iwao Mogi

A polycrystalline silver member is stuck on a given long member made of Hastelloy material or stainless steel material, to make a long base material. Then, an yttrium-based high temperature superconducting film is fabricated in the long base material by a CVD method with applying a magnetic field of preferable 2T or over. Thereby, an yttrium-based high temperature superconducting tape can be provided which can maintain the superconductivity under a higher magnetic field environment.

Method for fabricating an yttrium-based high temperature superconducting tape

A superconducting magnet comprised of a reinforced and stabilized superconducting wire material which is wound into an electromagnetic coil. The superconducting wire material comprises a compound superconducting substance, and a reinforcing, stabilizing agent which covers said compound superconducting substance. The superconducting magnet can be produced without requiring a specifically designed heat treatment furnace, and is light in weight and capable of generating a high magnetic field.

Method of producing a superconducting magnet

A substance is located in a gradient magnetic field and held in a levitating state by a magnetic force produced by the gradient magnetic field. The substance as such in the levitating state is heated and melted by ray or heat irradiation or by a resistance heater. Thereafter, the heating is stopped, and the substance is cooled as such in the levitating state. Since the magnetic force realizes the microgravity field where the substance is melted and cooled in the levitating state, the substance is formed to an ideally spherical shape with an extremely smooth surface.

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Sendai, Japan

Mitsuhiro Motokawa