CYCLOTRON CAPABLE OF ACCELERATING ALPHA PARTICLES AND H2+ PARTICLES, AND HIGH-GAIN METHOD AND HIGH-PRECISION METHOD

The present application provides a cyclotron and a high-gain, high-precision method for accelerating α particles and H2+ particles. The cyclotron comprises a dual ECR ion source system, a dual-beam injection and transmission system based on magnetic analyzer, a main magnet system, a high-frequency system based on 8th harmonics, and a dual-beam extraction system for precise control of α beam energy using deflector. The high-gain method includes doubling the frequency of the RF cavity, reducing the cavity height and the angle of the dees by half compared to the 4th harmonic high-frequency cavity, and adapting the internal rod diameter, cavity outer radius, angle width, and dees thickness accordingly. The high-precision method includes setting the beam extraction point position, observing the radial distribution of the beam on the target, and adjusting the deflector position in real-time during beam commissioning. In the present application, a cyclotron capable of accelerating alpha and H2+ particles is developed for the first time in the world; a double-beam high-brightness merging injection of the particles and the H2+ particles is realized for the first time, and a compact cyclotron uses an eighth-harmonic high-frequency cavity for acceleration for the first time.