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A 100 MeV compact cyclotron was designed for the generation of high intensity proton beam for theUpgrade Project of Beijing Tandem Accelerator Laboratory. In a compact machine, the bright externalsource and high efficiency injection system become one of the bottleneck problems for intense beamgeneration. From our operation experience of the 30 MeV cyclotron, we know ES(Einzell Lens andSolenoid) system is able to control effectively the envelope during beam injection. However, as the beamintensity increasing, the envelope becomes bigger and the emittance is deteriorated. So as to inject intensebeam into the spiral inflector with an inlet of 8mm×16mm, adjusting of ε_x and ε_y is necessary to match
A 100 MeV compact cyclotron was designed for the generation of high intensity proton beam for the Upgrade Project of Beijing Tandem Accelerator Laboratory. In a compact machine, the bright externalsource and high efficiency injection system became one of the bottleneck problems for intense beamgeneration. From our operation experience of the 30 MeV cyclotron, we know ES (Einzell Lens andSolenoid) system is able to control effectively the envelope during beam injection. However, as the beamintensity increasing, the envelope becomes bigger and the emittance is deteriorated. So as to inject intense beam into the spiral inflector with an inlet of 8mm × 16mm, adjusting of ε_x and ε_y is necessary to match