| 摘要 |
<p>A cathode of a magnetron having a radial extension to accommodate the cathode terminals 6, 7, is supported on much shorter cathode support arms 3, 4 than hitherto, since those arms are mounted in an end wall 18 of the radial extension which is positioned nearer to the cathode end of the radial extension than to the other end. This shifts any vibrations to a higher frequency band, which is less liable to be excited in the event the magnetron is moved rapidly as in a linac used for radiotherapy purposes.</p> |
