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The need for a low-cost, low-dose 3D imaging capability, as an alternative to CT and MRI scanners, has driven the development of a multi-cathode, stationary Digital Tomosynthesis (s-DT) scanner. Demonstration experiments with an array of cold cathodes as electron sources have been reported by multiple groups. We report the operation of a device with a different field emitter geometry, at 60kV, to...
The opportunities of power consumption decreasing are investigated theoretically and in experiments. SWS geometry optimization and depressed collector can reduce power consumption on the order of magnitude.
In a triode type electron gun the amplification factor, mu, determines how the beam current varies with time for any given gun geometry and applied voltages. A simple triode low-mu formula has regularly been used to predict IOT behaviour however, it is incapable of addressing non-uniform cathode emission resulting from modern grid geometry and small cathode-grid distances. Consequently it is incapable...
Design and characterization of a new generation of single-photon avalanche diodes (SPAD) array, manufactured by ST-Microelectronics in Catania, Italy, are presented. Device performances, investigated in several experimental conditions and here reported, demonstrate their suitability in many applications. SPADs are thin p-n junctions operating above the breakdown condition in Geiger mode at low voltage...
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