| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetron excellent in impact resistance and vibration resistance, easy to assemble even when a cooling block and a magnetic yoke vary in size, and hardly causing corrosion of a metal. SOLUTION: A gap is provided between the cooling block 22 and the magnetic yoke 20. A cushioning material 25 is interposed in the gap to fix the cooling block 22 relatively to the magnetic yoke 20 therethrough by screws. Thus, even when the metals having a large difference in ionization tendency are used in the cooling block 22 and the magnetic yoke 20, the corrosion of the metals hardly occurs. Further, the cushioning material 25 is provided in the gap between the cooling block 22 and the magnetic yoke 20, so that an impact or vibration to a positive electrode tubular member 10 can be mitigated, and the disconnection deficiency of the filament of a negative electrode structural member can be reduced. Further, since a dimensional dispersion of the cooling block 22 or the magnetic yoke 20 can be absorbed by the cushioning material 25, the dimensional accuracy of parts does not need to be enhanced to facilitate assembly. COPYRIGHT: (C)2009,JPO&INPIT
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