DC-60 Heavy Ion Cyclotron Complex:The First Beams and Project Parameters

摘要

The construction of the DC-60 Heavy Ion Cyclotron for the Interdisciplinary Scientific ResearchComplex (ISRC) in Astana started in early 2004. The cyclotron was manufactured and tested at the Flerov Lab-oratory of Nuclear Reactions (FLNR) in Dubna. The main units were delivered to Astana and assembled in theISRC building in the summer of 2006. The cyclotron was turned on in September, 2006. The first heavy ionbeams in the whole A/Z and energy ranges were accelerated and extracted in December, 2006.The complex, based on the DC-60 cyclotron, is intended for applied and fundamental research using acceleratedheavy ion beams ranging from Carbon to Xenon with energies in the range of 0.34-1.77 MeV/nucleon, as wellas for experiments on the channel of low energy ion beams, where the ion extraction voltage supplied by theECR source reaches 25 kV. The energy variation of the accelerated ions is accomplished by changing the ioncharge. The possibility of smoothly tuning the ion energy by ±30% of its nominal value can be seen by changingthe cyclotron magnetic field. Within the framework of commissioning the DC-60 cyclotron, a number of exper-iments were carried out with accelerating charged particle beams in the main points of the working diagram:Ar~(4+) ~(40)Ar~(5+),~(40)Ar~(7+),~(84)Kr~(12+) ·The acceleration modes for Nitrogen, Argon, and Krypton jions on the4th and 6th harmonics of RF accelerating voltage in the whole range of magnetic field variation were investi-gated.·The possibilities for a bunching system and the influence of injected beam intensity on the acceleration effi-ciency were investigated.·A beam was extracted from the accelerator with an efficiency exceeding 60%.·A Krypton accelerated ion beam ~(84)Kr~(12+) with a current of up to 2 [tA was extracted into the beam transportchannel, matched, and transported to a technological facility for polymer film irradiation. An irradiation fieldwith the required particle flux density and homogeneity was provided by 2 scanner magnets, and the experi-mental irradiation of polymer films was carried out.·The operational modes, with magnetic fields corrected by radial correcting coils of cyclotron, were investi-gated.