FRA —  New Projects, Beam Dynamics, Simulations and Applications   (27-Sep-19   08:30—10:00)
Chair: J.M. Schippers, PSI, Villigen PSI, Switzerland
Paper Title Page
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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FRA02 Current Status of Sumitomo’s Superconducting Cyclotron Development for Proton Therapy 340
 
  • H. Tsutsui, Y. Arakawa, Y. Ebara, A. Hashimoto, M. Hirabayashi, T. Hirayama, N. Kamiguchi, J. Kanakura, Y. Kumata, Y. Mikami, H. Mitsubori, T. Miyashita, T. Morie, H. Murata, H. Oda, H. Ookubo, T. Sakemi, M. Sano, T. Tachikawa, T. Takahashi, K. Taki, T. Tsurudome, T. Watanabe, J.Y. Yoshida
    SHI, Tokyo, Japan
 
  Sumitomo Heavy Industries, Ltd. is developing a com-pact superconducting isochronous 230 MeV cyclotron for proton therapy. It is designed to produce 1000 nA proton beams for high dose rate cancer treatment. The cyclotron magnet, which includes a liquid-helium-free cryostat, has been fabricated and the magnetic field has been measured. Magnetic field distribution and pa-rameters such as horizontal and vertical tunes agreed well with the original design. A 120 kW solid-state RF system is being tested. Other components such as the ion source and electrostatic deflector are being fabricated. After the testing of individual components, they will be assembled and beam testing will be scheduled at a new test site.  
slides icon Slides FRA02 [8.556 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-FRA02  
About • paper received ※ 13 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020  
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FRA03 Energy Reduction of Varian’s ProBeam 250 MeV Cyclotron to 226 MeV 344
 
  • A. Roth, E.M. Akcöltekin, O. Boldt, F. Klarner, H. Röcken, T. Stephani, J.C. Wittschen
    VMS-PT, Troisdorf, Germany
 
  With its superconducting 250 MeV isochronous proton cyclotron AC250, Varian uses a powerful accelerator for the ProBeam particle therapy systems. However, data from clinical operation has shown that the vast majority of treatments is only making use of proton ranges of less than 30 cm WET (water equivalent thickness), i.e. beam energy of 218 MeV at the patient. This led to a decision at Varian in Dec 2018 to conduct a redesign program with the goal to reduce extraction energy of the ProBeam cyclotron to 226 MeV. We present beam dynamics simulations for the AC226 beam acceleration and extraction. They actually show that only a reduced main coil current and adapted magnetic shimming process, as well as a slightly lower RF frequency is needed for re-tune. Furthermore, results indicate that a similar performance as compared to the AC250 can be expected. A first of its kind (FOIK) AC226 cyclotron is built by seamless integration into Varian’s production process. The magnetic field measurement and shimming is completed, in-house RF and beam commissioning is planned for autumn 2019. We report on the status of the FOIK machine.  
slides icon Slides FRA03 [4.697 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-FRA03  
About • paper received ※ 14 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020  
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FRA04 Cyclotrons Based Facilities for Single Event Effects Testing of Spacecraft Electronics 348
 
  • P.A. Chubunov, A.S. Bychkov
    ISDE, Moscow, Russia
  • V.S. Anashinpresenter, A.E. Koziukov
    United Rocket and Space Corporation, Institute of Space Device Engineering, Moscow, Russia
  • I.V. Kalagin, S.V. Mitrofanov
    JINR, Dubna, Moscow Region, Russia
 
  Space radiation is the main factor limiting the operation time of the onboard equipment of the spacecraft due to the radiation effects occurring in the electronic components. With a decrease in the size of semiconductor structures, the sensitivity to the effects of individual nuclear particles increases and hitting one such particle can cause an upset or even failure of a component or system as a whole. Since the phenomenon occurs due to the impact of a separate particle, these radiation effects are called Single Event Effects (SEE). To be sure that the electronic component is operational in space, ground tests are necessary. SEE tests are carried out on test facilities that allow accelerating heavy ions from C to Bi to energies from 3 to a few dozen MeV/A. Cyclotrons are best suited for this purpose. In this paper, the installations created by request of ISDE based on the cyclotrons of FLNR JINR are described.  
slides icon Slides FRA04 [0.849 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-FRA04  
About • paper received ※ 17 September 2019       paper accepted ※ 27 September 2019       issue date ※ 20 June 2020  
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