Author: An, S.
Paper Title Page
MOP006 The Design and Simulation on the Extraction System for CYCIAE-50 35
 
  • S. An, F.P. Guan, P. Huang, L.Y. Ji, M. Li, Y.L. Lv, S.M. Wei, L.P. Wen, H.D. Xie, J.S. Xing, T.J. Zhang, X. Zheng
    CIAE, Beijing, People’s Republic of China
 
  A 50 MeV H compact cyclotron (CYCIAE-50) as a proton irradiation facility is under construction at China Institute of Atomic Energy. The proton beam with the energy of 30 MeV to 50 MeV and the current of 10 uA will be extracted by a single stripping extraction system. In order to reduce the beam loss, the combination magnet is fixed inside the magnetism yoke. The positions of stripping points for the different extraction energy are calculated and the extracted beam trajectories after stripping foil are simulated in detail in this paper. The extracted beam distribution after stripping foil and the extracted beam characters will be studied in this paper. The beam parameters after extraction will be given by the extracting orbit simulation. The design on the whole stripping extraction system has been finished and will be presented in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP006  
About • paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020  
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MOP007 The Design and Calculation on the Injection and Central Region for CYCIAE-50 39
 
  • L.Y. Ji, S. An, F.P. Guan, P. Huang, X.L. Jia, Y.L. Lv, C. Wang, S.L. Wang, T.J. Zhang, X. Zheng
    CIAE, Beijing, People’s Republic of China
 
  A 50 MeV cyclotron (CYCIAE-50) is been building at China Institute of Atomic Energy. CYCIAE-50 is a compact H cyclotron with the proton beam energy of 30 MeV to 50 MeV and the beam current of 10 uA. A multi-cusp H ion source with the beam current of 3 mA will be used for this machine. The design on the injection and central region of CYCIAE-50 has been finished. The way of matching the beam from ion source to central region and the design of central region will be present in this paper. In addition, some significant problems in central region will be discussed, including radial alignment, axial focusing, longitudinal focusing and energy gain, etc.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP007  
About • paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020  
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MOP008 Mechanical Design of Beam Lines for a 230 MeV SC Cyclotron at CIAE 42
 
  • M. Yin, S. An, F.P. Guan, Y.L. Lv, G.F. Pan, F. Wang, F. Wang, S.M. Wei, L.P. Wen, T.J. Zhang, F.Zhu. Zhu
    CIAE, Beijing, People’s Republic of China
 
  Funding: This work was supported in part by the National Natural Science Foundation of China under Grant 11475269 and 11375274.
To develop the proton beam transfer system which used in the field of proton therapy, the mechanical design of proton beam lines based on the CYCIAE-230 has been finished at the China Institute of Atomic Energy (CIAE). The proton beam transfer system includes the beam lines, beam dump, gantry, nozzle, couch, image guidance system, etc. Two beam lines are designed at CIAE this moment. One is for the nozzle system, the other is for the beam dump. The beam lines include four systems: the energy selection system, the beam transportation systems, gantry system, beam dump. The beam lines are very compact in order to match the beam optics and the space limitation. The gantry can be rotated ±180°. There are several key components in beam lines, such as magnets, degrader, beam diagnostics component, vacuum component, etc. The designed mechanical tolerance of the magnets is limited less than 0.1 mm. There are at least four targets on each magnets for collimation and all the components can be adjusted in three dimensions. The magnets are being manufactured now. The mechanical design of proton beam lines based on the CYCIAE-230 will be presented in this paper.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP008  
About • paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020  
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MOP010 A 50 MeV Proton Beam Line Design 45
 
  • S.M. Wei, S. An, L.L. Guan, Y.L. Lv
    CIAE, Beijing, People’s Republic of China
 
  The cyclotron Center at the China Institute of Atomic Energy (CIAE) is now developing a medium-energy proton irradiation device that provides a proton beam with an energy range of 30 MeV to 50 MeV to simulate a space proton radiation environment, which has a significant impact on spacecraft. A beam transport line is designed for irradiation effect study based on the 50 MeV compact cyclotron, which requires continuous adjustment of the beam energy and the beam spot on the target requires high uniformity. The proton beam extracted from the cyclotron is adjusted to the energy required by using the degrader, then the proton beam is bended and focused. In order to obtain uniform large-diameter beam spot on the target, a wobbling magnet is installed on the beam line to uniformly sweep the proton beam on the target and finally obtain the proton beam with energy of 30 MeV - 50 MeV, current of 10 uA and beam spot of 20 cm * 20 cm on the target.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP010  
About • paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020  
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MOP011 Magnetic Field Measurement and Shimming for a Medical Compact Cyclotron 48
 
  • L.L. Guan, S. An, T. Cui, P. Huang, X.L. Jia, M. Li, F. Wang, T.J. Zhang
    CIAE, Beijing, People’s Republic of China
 
  A compact cyclotron is developed by Cyclotron Accelerator Research Center at China Institute of Atomic Energy (CIAE) to extract 14 MeV proton beam for medical radioisotopes production, so as to meet the market demands of early diagnosis of malignant tumors, cardiovascular and cerebrovascular diseases. Owing to the small size and limited space of small medical cyclotrons, critical requirements are imposed on magnetic field measurement. For this reason, a magnetic field measurement system, with high-precision and high-stability, suitable for small cyclotrons is adopted and then an efficient magnetic field shimming method is used, which greatly reduces the construction period. It provides a strong guarantee for the stable operation of medical small cyclotrons.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP011  
About • paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020  
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TUP031 Design and Construction Progress of Cyclotron Based Proton Irradiation Facility for Space Science 230
 
  • Y.L. Lv, S. An, T. Cui, T. Ge, B. Ji, X.L. Jia, S.L. Wang, T.J. Zhang
    CIAE, Beijing, People’s Republic of China
 
  The proton irradiation facility for space science research and application consists of a 50 MeV proton cyclotron, two beam lines and two radiation effect simulation experimental target station. The 50 MeV proton cyclotron (CYCIAE-50) is a compact negative hydrogen ion cyclotron with the proton beam energy from 30 MeV to 50 MeV, and the beam intensity is from 10 nA to 10 uA. The cyclotron is about 3.2 m in diameter, 3.5 m in total height and 80 tons in total weight. The diameter of the pole is 2000 mm, the outer diameter of the yoke is 3200 mm, and the height of magnet is 1500 mm. The cyclotron uses an external multi-cusp H ion source. Then the H beam is injected into the accelerating orbit by the spiral inflector. The cyclotron frequency is about 16 MHz. The RF system is a pair of λ/2 RF cavities driven by a 25 kW transmitter. The fourth harmonic accelerating frequency is about 65 MHz. The proton beam is extracted by a single movable stripping carbon foil with the stripping extraction efficiency of 99%. The 50 MeV cyclotron has now been designed in detail, and its main components, such as the main magnets and RF cavities, are being manufactured in the factories in China.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP031  
About • paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020  
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FRA01 A New Solution for Cost Effective, High Average Power (2 GeV, 6 MW) Proton Accelerator and its R&D Activities 334
 
  • T.J. Zhang, S. An, T.J. Bian, F.P. Guan, M. Li, S. Pei, C. Wang, F. Wang, Z.G. Yin
    CIAE, Beijing, People’s Republic of China
 
  The 100 MeV compact cyclotron, CYCIAE-100 was approved to start the construction in 2011, and the first proton beam was extracted on July 4, 2014. In 2017, the 200 µA proton beam development was conducted, and in 2018, the production of high power beam from 20 kW to 52 kW had been delivered successfully to the beam dump. Due to the successful construction of 435 tons magnet for CYCIAE-100, it has been proved that the gradient adjustment of magnetic field along radius can effectively enhance the vertical focusing during the isochronous acceleration. This key technology was applied to the general design of a 2 GeV CW proton accelerator, the energy limitation of the isochronous machine is increased from ~1 GeV to 2 GeV, by our contribution of the beam dynamics study for high energy isochronous FFAG. This paper will introduce CIAE’s engineering experience of precision magnet, high power RF systems, and the advantages of beam dynamics simulation based on large-scale parallel computing. The cost-effective solution for such a 2 GeV high power circular accelerator complex will be presented in detail after the brief introduction about the high power proton beam production by the CYCIAE-100.  
slides icon Slides FRA01 [19.669 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-FRA01  
About • paper received ※ 15 September 2019       paper accepted ※ 23 June 2020       issue date ※ 20 June 2020  
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