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    • 2. 发明专利
    • MAGNETIC DEVICE FOR GYROTRON
    • JPH0945253A
    • 1997-02-14
    • JP19683395
    • 1995-08-01
    • KARLSRUHE FORSCHZENT
    • ARUNORUTO MEBIUSUYURIUSU PURETSUTEREEPUNAA
    • G21B1/11G21B1/00H01J23/10H01J25/00H05H7/04
    • PROBLEM TO BE SOLVED: To raise the electrical efficiency of a gyrotron without any need of reforming a gyrotron tube itself by changing the conventional magnet to a specific magnet, regarding a magnetic device for forming a prescribed magnetic field. SOLUTION: A conventionally used superconducting magnet or normal conducting magnet is changed to a permanent magnet device 7, regarding a gyrotron magnetic device for guiding electrons emitted from an emitter 9 and forming a uniform magnetic field in a resonance zone 11 along the axial line. This permanent magnet device 7 is formed out of a center annular magnet polarized in a radial direction, an annular magnet equipped with a collector in a direction toward one edge of the center annular magnet and polarized for guiding electron beams upward toward the direction of a collector zone 13, and an annular magnet device mounted on the other edge of the center annular magnet for prohibiting the outflow of magnetic field. At the same time, the magnet device is mounted within the resonance zone 11 to enable each magnet to form a prescribed wave magnetic field, so as to ensure freedom from the reversal of the magnetic field or restrain the reversal, if any, to such an level as easily compensated.