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This report covers the theory and model test results on a radio frequency system for a frequency modulated cyclotron as required for acceleration of 350 Mev protons. A rotating condenser is used at approximately one-third of the length of the dee line from the shorted end. It is shown to be possible to operate through the range of approximately 9 to 24 megacycles per second as required for the acceleration of either protons or deuterons in the 184-inch Berkeley cyclotron.
This report covers the theory and model test results on a radio frequency system for a frequency modulated cyclotron as required for acceleration of 350 Mev protons. A rotating condenser is used at approximately one-third of the length of the dee line from the shorted end. It is shown to be possible to operate through the range of approximately 9 to 24 megacycles per second as required for the acceleration of either protons or deuterons in the 184-inch Berkeley cyclotron.
Performance curves and test results on a half scale model of the radio frequency system designed to accelerate protons in the Berkeley 184-inch cyclotron are presented. This report is a sequel to K.R. Mackenzie's report on the three quarter wave radio frequency system for frequency modulated cyclotrons.
Consists of AECD 1-2023 (no. 1-1779 called MDDC).
A grounded grid oscillator and a single dee resonant system for use with a frequency modulated cyclotron are described. 7.5 Mev deuterons have been accelerated with dee voltages up to 15 kv and a frequency range from 9.5 to 12 megacycles. 15 Mev protons have been accelerated with voltages up to 11 kv and a frequency range from 19 to 24 megacycles. Coupling constants, phase correction, amplitude modulation and discharge phenomena are discussed.