Performance Report on the Kazakhstan Variable Energy Isochronous Cyclotron

A.A. Arzumanov, V. Batischev, V. I. Gerasimov, L.M. Nemenov, M.Kh. Nigmatov

1975

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DOI 10.1007/978-3-0348-5520-4_132
Data confidence 70 medium
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Abstract

A 150 cm pole diameter variable energy isochronous cyclotron was constructed at the Institute of Nuclear Physics near Alma-Ata to provide a nuolear phvsics research facility in Kazakhstan 1,2) . It was put into operation in 1965)as an ordinary fixed-frequency cyclotron 3) , was converted in 1972 and sheduled for use in isochronous mode since the March 1972. A brief description of the main features and current operation of the converted cyclotron is given and further improvement program is presented. The magnetic field of the cyclotron has threefold symmetry. The maximum fieldradius product of the magnet is 1064 kG. cm. Por correcting the magnetic field shape a trimming coil system is used. The RP system is tunable over the range 8, 5–19, 0 MHz. The maximum energy of 30 MeV protons, 25 MeV deuterons, 50 MeV alphas, 62 MeV helium-3 ions at the external target are available. During first three years different improvements have been made, the principal ones being increasing the extraction efficiency at maximum energies from 60% to 70% by changing the electrostatic deflector, installation of the new puller with two slits and movable slit in the central region, adjustable length magnetic shield channel, a helium-3 recovery system. The operational time of the cyclotron was increased up to 165 hours per week. In order to satisfy an increasing demand a new beam transport system is designed and its installation is planned for the end of 1976. Some changes will be made in the RP amplifier. We hope that these improvements will give a better efficiency of cyclotron performance. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.