52 kW CW proton beam production by CYCIAE-100 and general design of high average power circular accelerator

Abstract

At CIAE, we have been engaged in the development of isochronous accelerator for 60 years. From Cyclotron in the past to CW FFAG at present, isochronous accelerators have the technical advantages of high average beam intensity, fixed magnetic field and RF frequency, and low construction and operation costs. Therefore, the isochronous accelerator has been widely used. In this paper, a 100 MeV compact isochronous cyclotron CYCIAE-100 developed at CIAE in recent years is introduced. The successful commissioning of the cyclotron obtains a proton beam power up to 52 kW. Its stable operation provides dual-beam with the intensity ranges from 10 pA to 520 μA, and its applications are carried out annually for more than 30 users in different research fields. This paper also introduces a 2 GeV CW FFAG first proposed by CIAE. From the design of the 2 GeV CW machine, the energy limitation of the isochronous accelerator is increased from ∼1 GeV to 2 GeV, by our contribution of the beam dynamics study for high energy isochronous FFAG. The basic design of the key components, including HTS magnet, HP RF system, injection and extraction system, have also been explored. The preliminary conclusions suitable for engineering implementation are also presented.