A method is described for obtaining short intense bursts (5 mμsec and 10–20 ma) of 22 Mev deuterons at a repetition rate of 500 cps. The cyclotron arc is pulsed on for 1 μsec, and one of the approximately ten circulating phase-grouped beam bunches is selected for deflection onto the external cyclotron target by means of a 50 mμsec pulse on the cyclotron deflector. Using a 12.5 meter flight path the resulting radiations were analyzed. Investigations of backgrounds showed them to be less than one percent.
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James E. Draper (1958) studied this question.
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