Alps Electric Co., Ltd.

Technological University of Nagaoka

Jinichi Matsuda

Koichi Mukasa

Masahiro Iizuka

Kinya Aoyagi

Tsutomu Yamashita

Yasuyuki Kondoh

Akihiro Inada

The present invention relates to a method for measuring three-dimensional spatial magnetic field distributions used particularly in measuring the magnetic field distribution in a small spatial region such as a leakage magnetic field of a magnetic head and the object thereof is a measuring method capable of measuring a high frequency magnetic field in the small spatial region with a high precision.

Method for measuring three-dimensional spatial magnetic field

A superconducting electron beam generator comprising a cavity resonator situated in a refrigerator and containing a superconductive metal member fixed on the cavity end plate, a tip of which member is disposed at the strongest point of a high frequency electric field formed in the cavity. A high quality and high energy coherent electron beam is emitted by the electric field from the tip of the metal member along an axis of the cavity and derived through a minute hole formed through the opposite end plate. This superconducting electron beam generator is particularly suitable for a high resolution electron microscope, a high quality X-ray generator, a crystallographic electron beam apparatus and the like.

Superconducting electron beam generator

Growing community of inventors

Nagaoka, Japan

Jinichi Matsuda