The huge, super-secret "betatron"which generates an X ray so powerful and dangerous that the entire apparatus must be enclosed in three-foot concrete wallswas completed a couple of years ago. Wartime security kept it hidden until last week. Even then, General Electric Co. did not tell quite all. But G.E. did give a fair description of how the great gadget works, and some broad hints about a few of the things that it will do.
The betatron, a close relative of the ordinary transformer which raises or lowers the voltage of an alternating current, is an electron accelerator. A whopping electromagnet (130 tons)...
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