Keyword: dipole
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MODM04 Design of the Fast Scanning Magnets for HUST Proton Therapy Facility proton, simulation, cyclotron, target 42
 
  • X. Liu, W. Chen, Z.K. Liang
    Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China
  • Q.S. Chen, K.F. Liu, B. Qin
    HUST, Wuhan, People's Republic of China
 
  Funding: Work supported by Major State Research & Development Program, with grant No. 2016YFC0105305
For implementation of proton therapy, Huazhong University of Science and Technology has planned to construct a 250 MeV/500 nA superconducting cyclotron for proton therapy. In the beam-line, the scanning system spreads out the proton beam on the target according to the complex tumor shape by two magnets for horizontal and vertical scanning independently. As dipole magnets are excited by alternating currents and the maximum repetition rate is up to 100 Hz, the eddy currents are expected to be large. This paper introduces the design of these two scanning magnets and analyzes the eddy current effect. Slits in the end pole are proven to be an effective way to reduce the eddy current. Different directions, distributions and width sizes of slits are simulated and compared to determine the slits arrangement. At last, the maximum temperature of the optimized scanning magnets reaches the temperature requirements.
 
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MOP12 Fast Scanning Beamline Design Applied to Proton Therapy System Based on Superconducting Cyclotrons proton, cyclotron, emittance, radiation 79
 
  • B. Qin, Q.S. Chen, K. Fan, M. Fan, K.F. Liu, P. Tan
    HUST, Wuhan, People's Republic of China
  • W. Chen, Z.K. Liang, X. Liu, T. Yu
    Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China
 
  Funding: Work supported by The National Key Research and Development Pro-gram of China, with grant No. 2016YFC0105305
Proton therapy is recognized as one of the most effec-tive radiation therapy method for cancers. The super-conducting cyclotron becomes an optimum choice for delivering high quality CW proton beam with features including compactness, low power consuming and higher extraction efficiency. This paper introduces de-sign considerations of the beamline with fast scanning features for proton therapy system based on supercon-ducting cyclotrons. The beam optics, the energy selec-tion system (ESS) and the gantry beamline will be de-scribed.
 
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THB03 Development of HTS Magnets for Accelerators target, operation, operational-performance, ion 294
 
  • K. Hatanaka, M. Fukuda, S. Hara, K. Kamakura, K. Shimada, Y. Yasuda, T. Yorita
    RCNP, Osaka, Japan
  • H. Ueda
    Okayama University, Okayama, Japan
 
  At RCNP, we have been developing magnets utilizing first generation HTS wire for this decade. HTS materials have advantages over LTS materials. Magnets can be operated at 20 K or higher temperature and cooled by cryocoolers. The cooling structure becomes simpler and the cooling power of a cooler is high. Owing to a large margin in operating temperature, it is possible to excite HTS magnets by AC or pulsed currents without quenching. Three model magnets were fabricated; a mirror coil for an ECR ion source, two sets of race track coils for a scanning magnet, and a 3T super-ferric dipole magnet having a negative curvature. They were excited with AC and pulse currents as well as DC currents and their performance was investigated. After successful tests of proto type models, two magnets have been fabricated for practical use. A cylindrical magnet generates a magnetic field higher than 3.5 T at the center to polarized 210 neV ultra cold neutrons. A dipole magnet is excited by pulse currents in order to deliver accelerated beams to two target stations by time sharing. Their design and operational performance are discussed.  
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THP24 Design of a Beamline from CYRCé for Radiobiological Experiments proton, cyclotron, emittance, quadrupole 359
 
  • E. Bouquerel, T. Adams, G. Heitz, C. Maazouzi, C. Matthieu, F.R. Osswald, M. Pellicioli, M. Rousseau, C. Ruescas, J. Schuler, E.K. Traykov
    IPHC, Strasbourg Cedex 2, France
 
  Funding: The project is supported by the Contrat de Projet Etat-Région (CPER) Alsace Champagne-Ardenne Lorraine 2015-2020.
The PRECy project (Platform for Radiobiological Experiments from CYRCé) foresees the use of a 16-25 MeV energy proton beam produced by the recently installed TR24 cyclotron at the Institut Pluridisciplinaire Hubert Curien (IPHC) of Strasbourg for biological tissues irradiation. The second exit port of the cyclotron will be used for this application along with a combination magnet. The platform will consist of up to 3 or 5 experimental stations linked to beamlines in a dedicated 15x13m area next to the cyclotron vault. One of the beamlines will receive proton beams of a few cm diameter at intensities up to 100 nA. The status of the design of the first beam line is presented. The characterization of the proton beam parameters has been performed using the quad scan method. TraceWin and COSY Infinity codes allowed simulating the beam envelopes and defining the electromagnetic equipment that will compose the beamline.
 
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