16'' Variable Energy Cyclotron

Abstract
A variable energy 16'' Cyclotron was constructed to produce 1∼2 Mev deuterons and 2∼4 Mev α-particles by new designs in its magnet and oscillator system. As far, deuterons in the energy range from 1.3 to 2 Mev and α-particles in the range from 3 to 4 Mev are used for ( d , p ), (α, p ) reactions, coulomb excitations etc. Although the variation of accelerating energy for a cyclotron is a considerably difficult problem, we found that it is possible, by some adjustments of the acceleration parameters of the cyclotron, to produce deuterons and α-particles over the sufficiently wide range of energy within a minute. The cyclotron will be used for producing 2∼4 Mev protons by changing a part of the resonator.

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