Abstract
Construction of the rotating‐anode x‐ray generator was based on that of A. Taylor (1949), the main difference lying in the design of the anode and of the anode‐cathode assembly. The anode is in the form of a flat disk, ⅞ in. thick and 6 in. in diameter, with the focus on the periphery. The cathode assembly is extended to partly cover the anode. This combined anode‐cathode assembly not only greatly reduces wall‐heating due to stray electrons but also improves the electron‐optical system. With zero‐bias conditions, it has been found possible with a silicated tungsten helix of outside diameter 0.065 in. to concentrate 200 ma into a line focus 0.020×0.40 in. with nominal spread outside the focal area. The cooling system is cyclic.
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