| 摘要 |
PURPOSE:To enable the easy formation of an intense magnetic field which is free from a bad effect caused by a phenomenon of short circuit of high-frequency current due to an increase in line capacity and has large resonance sharpness Q, by using a capacitor-type high-frequency conductor having a coaxial structure and by winding same in multilayer around the outer periphery of a hollow core. CONSTITUTION:A high-frequency coil 10 is constructed by a method wherein a capacitor-type high-frequency conductor 12 having a coaxial structure is wound in multilayer around the outer periphery of a hollow core 11. Inside the hollow portion of the hollow core 11. Inside the hollow portion of the hollow core 11, a magnetic-field sensor 13 formed of a one-wind coil for measuring a magnetic field is fitted. This conductor 12 has a construction wherein an inner conductor 21 and an outer conductor 22 are provided coaxially with a dielectric 23 interposed between them and an insulative coating 24 is provided on the outside thereof. The intensity of a magnetic field increases in proportion to an increase in the number of winds, and the construction of the coil is very simplified. This constitution enables the easy formation of an intense magnetic field which is free from a bad effect caused by a phenomenon of short circuit of high-frequency current or an action of mutual electromagnetic induction thereof due to an increase in the line capacity and has large resonance sharpness Q. |
