X-ray tube with dual grid and dual filament cathode for steering and focusing of electron beams

摘要

The cathode head is a first grid pair defining a first electron emitter filament having a first size and a wall of a first filament slot having the first filament therein, the first grid pair Each grid member defines a wall of a second filament slot having a first grid pair electronically connected to a different voltage source, a second electron emitter filament, and a first electron emitter therein. A second grid pair, wherein each grid member of the second grid pair may include a second grid pair that is electronically connected to a different voltage source. The first grid pair may have a first and second grid member, and the second grid pair may have a second grid member and a third grid member. The first grid member and the third grid member are electronically connected to the same voltage source, and the second grid member is electronically connected to a different voltage source. [Selection] Figure 3A