Abstract
GOOD progress is being made, according to news received recently from the United States, in the erection of the 184-inch cyclotron at Berkeley, California. The cost of this apparatus, it will be recalled (NATURE, May 18, 1940, p. 776), will be more than £200,000, and is being provided by the Rockefeller Institute. The concrete bed for the steel magnet, containing 1,200 tons of concrete, is finished. The erection of the steelwork is now starting, and is expected to be completed by April next. This will contain 3,700 tons of steel, the overall dimensions being, length 56 feet, width 184 inches, height 30 feet. The upper and lower yokes are to be built of some 36 sheets each of steel, 2 inches thick and 5.6 feet long, bolted and ultimately to be welded together to withstand earthquake shock. 300 tons of copper in the form of strip, 4 inches wide and ¼ inch thick, will be required for the windings. The cyclotron is expected to yield one hundred million electron-volt deuterons in a field of 10 kilogauss, for which the resonance wave-length is 39 metres.
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New Cyclotron at Berkeley, California. Nature 147, 22 (1941). https://doi.org/10.1038/147022b0
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DOI: https://doi.org/10.1038/147022b0