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RIS citation export for MOP004: Beam Dynamics Simulation of the Extraction for a Superconducting Cyclotron SC240

AU  - Wu, Z.
AU  - Ding, K.Z.
AU  - Li, J.
AU  - Song, Y.
AU  - Wang, Z.
ED  - Conradie, Lowry
ED  - De Villiers, John Garrett
ED  - Schaa, Volker RW
TI  - Beam Dynamics Simulation of the Extraction for a Superconducting Cyclotron SC240
J2  - Proc. of Cyclotrons2019, Cape Town, South Africa, 23-27 September 2019
CY  - Cape Town, South Africa
T2  - International Conference on Cyclotrons and their Applications
T3  - 22
LA  - english
AB  - In order to diversify the company’s cyclotron, a design study has been carried out on a 240 MeV superconducting cyclotron SC240 for proton therapy, which is based on our experience in design of SC200. In order to increase turn separation and extraction efficiency, resonant precessional extraction method is employed in the extraction system. A first harmonic field consistent with the Gaussian distribution is added to introduce beam precessional motion. Its effects on phase space evolution and turn separation increase is studied by a high efficiency beam dynamics simulation code. According to the study, its amplitude and phase have been optimized to meet the requirements of extraction beam dynamics. Based on beam dynamics simulation, the parameters of extraction system elements (two electrostatic deflectors and six magnetic channels) are chosen. Besides, the effects of sectors spiral direction on beam extraction are studied. Extraction efficiencies and beam parameters have been calculated.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 31
EP  - 34
KW  - extraction
KW  - cyclotron
KW  - proton
KW  - simulation
KW  - emittance
DA  - 2020/06
PY  - 2020
SN  - 978-3-95450-205-9
DO  - doi:10.18429/JACoW-Cyclotrons2019-MOP004
UR  - http://jacow.org/cyclotrons2019/papers/mop004.pdf
ER  -