| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetron in which a supporting arm of a cathode of the magnetron is made to hardly receive vibrations.SOLUTION: Since supporting arms 3, 4 of a cathode are fixed in an end part wall 18 of a radial extension part located toward a cathode end part of the radial extension part than other end parts, the cathode of the magnetron having the radial extension part for housing cathode terminals 6, 7 is supported on shorter cathode supporting arms 3, 4 than conventional ones. Thereby, the magnetron gets vibrations shifted to a higher frequency band wherein it hardly gets excited vibration, when moved rapidly as in the case of a linear acceleration system to be used for the purpose of a radiation therapy. |
