Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8166168 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2018 | 6 Pages |
Abstract
A SCC-250 MeV cyclotron, producing a 250 MeV proton beam, is under development in Huazhong University of Science and Technology (HUST) for proton therapy. The magnetic flux density, as a function of radius, decreases rapidly in the beam extraction region, which increases the radial beam size continuously along the extraction orbit. In this paper, an extraction channel inside the SCC-250 MeV is designed to control the beam size using passive magnetic channels. An equivalent lumped parameter method is used to establish the model of the extraction channel in the complex fringe magnetic field of the main magnet. Then, the extraction channel is designed using the lattice design software MADX. The beam envelopes are verified using particle tracing method. The maximum radial size of 6.8 mm and axial size of 4.3 mm meet the requirements of the extraction from the SCC-250 MeV.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Lige Zhang, Kuanjun Fan, Shengwei Hu, Xiaofei Li, Zhiyuan Mei, Zhijie Zeng, Wei Chen, Bin Qin, Yinong Rao,