Experiments on the acceleration and extraction of ions in a cyclotron with an azimuthally varying magnetic field and adjustable energy

Questions concerning the shaping and shimming of magnetic fields are discussed. Results of investigations of the ion acceleration process are presented. Results of experiments on extraction of the accelerated ion beam are reported. The construction of a deflecting system which fully compensates for the field dispersion effect is described. Ion energy adjustment was carried out for a magnetic field interval from 5 to 17 koe. The maximum deuteron energy in the extracted beam was 31.5 mev. The energy spread of the accelerated ions was ±1%.The experiments were carried out on the one and one-half meter cyclotron at the I. V. Kurchatov Order of Lenin Institute of Atomic Energy Academy of Sciences USSR 1].In conclusion the authors express deep gratitude to L. F. Kondrashev, N. Z. Kubyshkin and S. I. Prokof' ev for their great aid in the preparation of the experiments and also to all the service personnel of the cyclotron installation and to the machine shop workers.