Keyword: ion-source
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MOA03 Status Report on GANIL and Upgrade of SPIRAL1 cyclotron, target, experiment, ECR 9
 
  • O. Kamalou, P. Delahaye, M. Dubois, A. Savalle
    GANIL, Caen, France
 
  The GANIL facility (Grand Accélérateur National d’Ions Lourds) at Caen is dedicated for acceleration of heavy ion beams for nuclear physics, atomic physics, and radiobiology and material irradiation. Nowadays, an intense exotic beam is produced by the Isotope Separation On-Line method at the SPIRAL1 facility since 2001. New demands from the physics community motivated the upgrade of this facility in order to extend the range of post-accelerated radioactive ions. A 2 MEuro project allowed the profound modification of the facility and the commissioning was achieved in 2017. The status of this facility and the last results will be presented. The review of the cyclotron operation from 2001 to 2019 will be presented as well.  
slides icon Slides MOA03 [8.175 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOA03  
About • paper received ※ 10 September 2019       paper accepted ※ 24 September 2019       issue date ※ 20 June 2020  
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MOB01 Recent Progress in RIKEN RI Beam Factory cyclotron, cavity, ECR, acceleration 12
 
  • O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kidera, M. Komiyama, K. Kumagai, T. Maie, T. Nagatomo, T. Nakagawa, M. Nakamura, T. Nishi, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, A. Uchiyama, T. Watanabe, Y. Watanabe, K. Yamada
    RIKEN Nishina Center, Wako, Japan
  • Y.M. Miyake
    RIKEN, Saitama, Japan
 
  Recent efforts at the RIKEN RI Beam Factory (RIBF) are aimed at increasing the beam intensity for very heavy ions such as xenon and uranium. This paper presents upgrade programs carried out over the past few years, including modifications of the RF cavities of the RIKEN Ring Cyclotron and improvements of the charge stripper. The current performance of the RIBF accelerators and future plans to further increase the beam intensity are also presented.  
slides icon Slides MOB01 [13.848 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOB01  
About • paper received ※ 13 September 2019       paper accepted ※ 24 September 2019       issue date ※ 20 June 2020  
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MOB02 Progress With a New Radioisotope Production Facility and Construction of Radioactive Beam Facility at iThemba LABS target, cyclotron, controls, isotope-production 17
 
  • J.L. Conradie, J.K. Abraham, H. Anderson, L.S. Anthony, F. Azaiez, S. Baard, R.A. Bark, A.H. Barnard, P. Beukes, J.I. Broodryk, B. Cornelius, J.C. Cornell, J.G. De Villiers, H. Du Plessis, W. Duckitt, D.T. Fourie, M.E. Hogan, I.H. Kohler, C. Lussi, J. Mira, H.W. Mostert, C. Naidoo, F. Nemulodi, M. Sakieldien, V.F. Spannenberg, G.F. Steyn, N. Stodart, I.L. Strydom, R.W. Thomae, M.J. Van Niekerk, P.A. van Schalkwyk
    iThemba LABS, Somerset West, South Africa
 
  With the termination of the neutron and proton therapy programs at iThemba LABS, the use of the Separated Sector Cyclotron (SSC) has now shifted to nuclear physics research with both stable and radioactive ion beams, as well as biomedical research. A dedicated isotope production facility with a commercial 70 MeV H-minus cyclotron has been approved and both the cyclotron and isotope production target stations will be housed in the vaults that were previously used for the therapy programs. The status of this new facility will be reported. In the future the SSC will mostly be used for nuclear physics research, as well as the production of isotopes that cannot be produced with the 70 MeV H-minus cyclotron. At present the production of the alpha-emitting radionuclide Astatine (211At) with a 28 MeV alpha beam is being investigated. Progress with the construction of a facility for production of radioactive beams will be discussed. There will also be reports on development work on the ECR ion sources and progress with implementation of an EPICS control system.  
slides icon Slides MOB02 [10.580 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOB02  
About • paper received ※ 13 August 2019       paper accepted ※ 24 September 2019       issue date ※ 20 June 2020  
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MOP002 Recent Progress on Ion Source of SC200 Cyclotron cyclotron, proton, extraction, experiment 24
 
  • Y. Zhao, G. Chen
    ASIPP, Hefei, People’s Republic of China
  • L. Calabretta
    INFN/LNS, Catania, Italy
  • O. Karamyshev
    JINR/DLNP, Dubna, Moscow region, Russia
  • G.A. Karamysheva, G. Shirkov
    JINR, Dubna, Moscow Region, Russia
  • S.W. Xu
    USTC, Hefei, Anhui, People’s Republic of China
 
  Funding: National Natural Science Foundation of China under grant No. 11775258 & 11575237 and International Scientific and Technological Cooperation Project of Anhui (grant No. 1704e1002207).
A 200MeV compact superconducting cyclotron, named SC200, for proton therapy is under development by collaboration of ASIPP (Hefei, China) and JINR (Dubna, Russia). The ion source is a significant subsystem of the cyclotron. A hot cathode internal ion source has been designed and tested for SC200 cyclotron. The ion source has been successfully arc discharged on the test bench. The extracted beam current has been measured over 100 uA and filament lifetime of ion source exceeded 100 h, which indicated that the ion source meets the design requirements. The stability of the filament under strong magnetic field has also been tested and the differences between the two kinds of filament are compared.
 
poster icon Poster MOP002 [0.519 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP002  
About • paper received ※ 09 September 2019       paper accepted ※ 24 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 injection, cyclotron, MMI, solenoid 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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MOP017 Research on Metallic Ion Beam Production With Electron Cyclotron Resonance Ion Sources experiment, ECR, plasma, cyclotron 62
 
  • S.L. Bogomolov, A.A. Efremov, K.I. Kuzmenkov, D.K. Pugachev, Yu. Yazvitsky
    JINR, Dubna, Moscow Region, Russia
  • J.L. Conradie, D.T. Fourie, N.Y. Kheswa, J. Mira, F. Nemulodi, R.W. Thomae
    iThemba LABS, Somerset West, South Africa
 
  Many experiments in nuclear physics request the production of metallic ion beams. All elements from lithium up to uranium are of interest and most of them are required as a specific isotope which demands commonly enriched materials. Depending on the material properties beams of rare isotopes can be produced from solid materials or solid compounds. In this report the results of experiments carried out under a collaboration of JINR and iThemba LABS on the production of metallic ions from Electron Cyclotron Resonance Ion Sources (ECRIS) using resistive oven evaporation, Metal Ions from VOlatile Compounds (MIVOC) method and sputtering technique will be presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP017  
About • paper received ※ 11 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020  
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MOP031 Design of High Sensitive Magnet and Beam Dynamics for AMS Cyclotron cyclotron, extraction, radio-frequency, simulation 103
 
  • H. Namgoong, J.-S. Chai, M. Ghergherehchi, D.H. Ha, H.S. Kim, J.C. Lee
    SKKU, Suwon, Republic of Korea
 
  To produce a carbon-14 for Accelerator Mass Spectrometry (AMS), AMS Cyclotron magnet was designed. For the AMS system, Cyclotron magnet has been required high mass resolution. In order to realize high mass resolution, the phase error is designed within ±10 and the mass resolution was 5000. We used CST particle studio and Cyclone for beam dynamics simulation of this cyclotron magnet. This paper describes the AMS cyclotron magnet and beam dynamics design.  
poster icon Poster MOP031 [2.281 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP031  
About • paper received ※ 15 September 2019       paper accepted ※ 24 September 2019       issue date ※ 20 June 2020  
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MOC02 A Pathway to Accelerate Ion Beams up to 3 GeV with a K140 Cyclotron ECR, cyclotron, ECRIS, plasma 119
 
  • D.Z. Xie, L. Phair, D.S. Todd
    LBNL, Berkeley, California, USA
 
  Funding: U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract number DE-AC02-05CH11231
The capabilities of the K140 88-Inch Cyclotron at Lawrence Berkeley National Laboratory (LBNL) have been extensively enhanced through generations of electron cyclotron resonance ion sources (ECRISs). The cyclotron has evolved from a light-ion accelerator into a proton to uranium accelerator and has accelerated ultra-high charge state heavy ions, such as xenon and uranium. Recently, with 124Xe49+ ions injected from VENUS (a 3rd generation ECR ion source) the 88-Inch Cyclotron reached a new record of ~ 2.6 GeV.* This is an energy increase of about fifteen-fold over what this K140 cyclotron could achieve when it started operation almost six decades ago. A 4th generation ECR ion source, MARS-D, is under development and will further raise the output energy of the cyclotron. With the higher ion charge states produced that are anticipated with a new ECR ion source, the 88-Inch Cyclotron ought to be able to accelerate ion beams of energies of 3 GeV and higher for the radiation effects testing community. This paper will present and discuss the development of the MARS-D ECR ion source and the 88-Inch Cyclotron’s recent and possible future achievements.
*: D. Z. Xie, W. Lu, J. Y. Benitez, M. J. Regis, Recent Production of Ultra-High Charge State Ion Beams with VENUS, Proc. of the 23rd Int’l Workshop on ECR Ion Sources, Catania, Italy, Sept, 2018.
 
slides icon Slides MOC02 [11.895 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOC02  
About • paper received ※ 16 September 2019       paper accepted ※ 24 September 2019       issue date ※ 20 June 2020  
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TUP010 Buncher for the Optimization of the Injection of a 70 MeV Cyclotron emittance, cyclotron, injection, simulation 173
 
  • P. Antonini, A. Lombardi, M. Maggiore, L. Pranovi
    INFN/LNL, Legnaro (PD), Italy
  • L. Buriola
    Univ. degli Studi di Padova, Padova, Italy
 
  The design of an injection buncher for the 70 MeV cyclotron in use at LNL labs of INFN is under way. This buncher is to be installed between the ion source and the injection, to match the injected beam to the acceptance angle of the injection. The planned design is a 3/2 beta-λ double-gap driven with one or two harmonics of the 56 MHz RF frequency. Remotely-driven variable capacitors will be used for easy tuning of the matching box from the control system. The mechanical layout and simulations will be presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP010  
About • paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020  
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TUP028 Bremsstrahlung Photons Emission in 28-GHz Electron Cyclotron Resonance Plasma ECR, photon, detector, electron 219
 
  • M.J. Kumwenda, I.J. Lugendo
    Korea University, Seoul, Republic of Korea
  • J.-K. Ahn, J.W. Lee
    Pusan National University, Pusan, Republic of Korea
  • S.J. Kim, J.Y. Park, M. Won
    Korea Basic Science Institute, Busan, Republic of Korea
 
  Radial measurements of bremsstrahlung photons show high-energy intensity beyond a critical energy from electron cyclotron resonance (ECR) heating and its nature is not well understood so far. For the first time we have measured the bremsstrahlung photons energy intensity from 28-GHz ECR ion source at Busan Center of KBSI. Three round type NaI(Tl) detectors were used to measure the bremsstrahlung photons emitted at the center of the ECRIS at the same timeThe ECR ion source was operated at Radiofrequency (RF) power of 1 kW to extract 16O beam with a dominant fraction of O3+.We studied possible systematic uncertainties from different characteristics among the three NaI(Tl) detectors by repeating measurements alternatively. Geant4 simulation was performed to take the geometrical acceptance and energy-dependent detection efficiency into account due to large non-uniformity in the material budget. We extracted true bremsstrahlung energy spectra from the 28-GHz ECR ion source using the inverse-matrix unfolding method. The high energy intensities of the bremsstrahlung photons at the center of the ECRIS were explained by the internal structure and shape of ECR plasma.  
poster icon Poster TUP028 [1.240 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP028  
About • paper received ※ 13 September 2019       paper accepted ※ 25 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 cyclotron, proton, radiation, cavity 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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TUP035 Development of a Center Region for New Sumitomo Cyclotron cyclotron, proton, cathode, extraction 240
 
  • N. Kamiguchi, M. Hirabayashi, J. Kanakura, Y. Kumata, Y. Mikami, H. Murata, H. Oda, T. Tachikawa, T. Takahashi, T. Tsurudome, H. Tsutsui, J.Y. Yoshida
    SHI, Kanagawa, Japan
 
  We, Sumitomo Heavy Industries, Ltd., have been developing a new AVF cyclotron which employs a super-conducting magnet. This cyclotron purposes proton therapy fields and is most compact and high intensity among AVF cyclotrons which can accelerate to 230 MeV. In this paper we report and focus on its center region. The center region consists of bellows. The PIG ion source with hot cathode is located at the center of the cyclotron. As this cyclotron has 3 T magnetic field, the filament receives the Lorentz force strongly. To avoid the filament deformation, AC current heating is newly introduced into this ion source. The over 40 µA output have been already confirmed in our test bench. The extraction of the proton beam is conducted with an RF electric field. On one counter dee electrode a beam chopper is equipped and on the other counter dee electrode, phase slits, a pair of vertical beam dumpers and a beam probe are equipped. To control the beam current, static electric beam choppers deflect the beam direction vertically. C-H coils are put on outside of the center region in the valley. In this paper, the concept of the center region of this new cyclotron will be discussed.  
poster icon Poster TUP035 [1.416 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP035  
About • paper received ※ 13 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020  
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TUC04 Status of the Cyclotron Facility at Research Center for Nuclear Physics cyclotron, proton, operation, neutron 259
 
  • H. Kanda, M. Fukuda, S. Hara, T. Hara, K. Hatanaka, K. Kamakura, H.W. Koay, S. Morinobu, Y. Morita, M. Nakao, K. Omoto, T. Saito, K. Takeda, H. Tamura, Y. Yasuda, T. Yorita
    RCNP, Osaka, Japan
 
  Research Center for Nuclear Physics (RCNP), Osaka University operates a K140 AVF cyclotron and a K400 ring cyclotron and promotes the nuclear physics, accelerator physics, material science, nuclear medicine and related scientific fields. In the recent years, we operated the CAGRA campaign and Grand-RAIDEN+CAGRA campaign experiments* for taking advantage of the low background environment of the RCNP experimental halls and the high quality beams. We have successfully completed the low energy muon beam line, MuSIC**. We have been carrying out a program of the upgrade of the K140 AVF cyclotron which continued working since 1973. We aim at 10 times higher intensity for the proton beam than before and further stability of the operation. We also carried out the upgrade of the cyclotron building and related facilities to handle beams with higher intensity. From 2019, the RCNP started the Research Center of Subatomic Sciences as the International Joint Usage/Research Center in Japan. These upgrades are the most important programs to extend the function of the newly established center.
*E. Ideguchi, SSNET’17 - Abstracts and slides, (p. 1990). France, (2017).
**D. Tomono, PoS(NuFact2017) 111, (2018).
 
slides icon Slides TUC04 [8.696 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUC04  
About • paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020  
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THC03 Design of Accelerator Mass Spectrometry Based on a Cyclotron cyclotron, controls, resonance, network 314
 
  • H. Namgoong, J.-S. Chai, M. Ghergherehchi, D.H. Ha, H.S. Kim, J.C. Lee
    SKKU, Suwon, Republic of Korea
 
  In this paper, we present a cyclotron-based accelerator mass spectrometry system. Conventional AMS systems use tandem accelerators for generating carbon-14 beams. We have developed an ion source, RF buncher, cyclotron, triplet quadrupole, detector and dipole magnet for an AMS system.  
slides icon Slides THC03 [9.741 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-THC03  
About • paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020  
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THD01 Physics and Technology of Compact Plasma Traps plasma, ECR, diagnostics, electron 321
 
  • D. Mascali, G. Castro, L. Celona, S. Gammino, O. Leonardi, M. Mazzaglia, E. Naselli, G. Torrisi
    INFN/LNS, Catania, Italy
  • E. Naselli
    Catania University, Catania, Italy
 
  ECR Ion Sources are deemed to be among the most performing ion sources feeding particle accelerators, cyclotrons in particular. Improvements of their performances strictly depend on the knowledge of plasma physics in compact magnetic traps. The paper will comment on the results obtained by the INFN-LNS team and international collaborators by means of a multi-diagnostics setup able to monitor the evolution in space and time of several plasma parameters, simultaneously with beam extraction and analysis in the LEBT, in single vs. double frequency operations, including the RF power and magnetic field scalings, and exploring regimes dominated by plasma turbulence. The results are relevant for the operations of existing ion sources and for the design of new ones. Compact magnetic traps fashioned in a similar way of ECRISs can be considered as an experimental environment by itself: we are exploring this opportunity relying to the in-plasma measurements of radionuclides lifetimes (in particular, beta-decaying elements): CosmoChronometers or nuclei involved in the s-process nucleosynthesis are among the case studies, opening new perspectives in the nuclear astrophysics field.  
slides icon Slides THD01 [17.662 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-THD01  
About • paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020  
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THD03 An Improved Concept for Self-Extraction Cyclotrons extraction, cyclotron, simulation, site 330
 
  • W.J.G.M. Kleeven, E. Forton
    IBA, Louvain-la-Neuve, Belgium
 
  A study is made for an improved concept of self-extraction in low and medium energy cyclotrons to be used for production of medical isotopes. The prototype of the self-extracting cyclotron was realized around the year 2001*. From this machine, currents higher than 1 mA were extracted and transported to a Pd-103 production target. However, at the higher intensities, the extraction efficiency was dropping to about 70-75%, and the extracted emittance was rather poor, leading to additional losses in the beamline. Several improvements of the original concept are proposed: i) the beam coherent oscillation (as needed for good extraction) is no longer generated with harmonic coils, but is obtained from a significant off-centring of the ion source, ii) the cyclotron magnet has perfect 2-fold symmetry, allowing the placement of two internal sources and dual extraction on two opposite hill sectors, iii) a substantial improvement of the magnetic profile of the hill sectors. Simulations show an extraction efficiency up to almost 95% and emittances at least a factor 3 lower as compared to the original design. The new magnetic design is shown, and results of beam simulation are discussed.
* W. Kleeven et al., 16th Int. Conf. Cycl. Appl. 2001, East-Lansing.
 
slides icon Slides THD03 [4.060 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-THD03  
About • paper received ※ 19 September 2019       paper accepted ※ 27 September 2019       issue date ※ 20 June 2020  
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FRA02 Current Status of Sumitomo’s Superconducting Cyclotron Development for Proton Therapy cyclotron, extraction, cavity, proton 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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