A recent trial user had an application that required creation of a three-dimensional mesh of a printed circuit. Such an object is thin in z with relatively complex spatial variations in x-y. The user attempted to represent the full complement of conductors as a single, thin STL solid object with thousands of facets. It would have [...]
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High-current electron-beam guns typically have the geometry of Fig. 1. The flat or concave cathode operates in the space-charge limited mode. A shaped focusing electrode compensates for the effect of beam-generated electric fields to generate a parallel or converging beam. The heated cathode is composed of a high-temperature material like tungsten. The focusing electrode is composed [...] |
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