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US 2012/0235564 A1Published application
Magnetron
AssigneeE2V Technologies (UK) Limited
InventorsDavid Bernard Fox, Timothy Peter Fox, Scott Williams
Life of this patent
Estimating the term…
Abstract
A cathode of a magnetron having a radial extension to accommodate the cathode terminals is supported by arms which have a greater diameter over the region in which they are supported in the glass thimble than over the region of the free ends. 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.
Claims5
A magnetron, comprising:
- a cathode having an axis;
- a vacuum envelope including a glass portion extending radially relative to the axis of the cathode;
- and
- a pair of electrically conducting support arms mounted vacuum-tight in the glass portion of the vacuum envelope and having free ends, wherein leads are connected between the free ends of the support arms and the cathode, and wherein the support arms have a diameter over a region of mounting in the glass portion that is greater than a diameter of the support arms at the free ends.
1 more element
Dependencies are inferred from the claim text.