Keyword: proton
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TUVIR15 Long-Term Beam Position and Angle Stabilities for the J-Parc Main Ring Slow Extraction extraction, septum, experiment, operation 31
 
  • M. Tomizawa, Y. Arakaki, T. Kimura, Y. Komatsu, S. Murasugi, R. Muto, K. Okamura, Y. Shirakabe, E. Yanaoka
    KEK, Ibaraki, Japan
 
  A 30 GeV proton beam accelerated in the J-PARC Main Ring (MR) is slowly extracted by the third integer resonant extraction and delivered to the hadron experimental hall. One of the critical issues in slow extraction of a high intensity proton beam is an inevitable beam loss caused by the extraction process at septum devices. A unique dynamic bump scheme for the slow extraction has been applied to reduce the beam loss. We have achieved 51 kW stable operation at 5.2s cycle in the recent physics run. The extraction efficiency is very high, typically 99.5%. However, the dynamic bump scheme is sensitive to the beam orbit angle at the first electrostatic septum (ESS1). The orbit angle of the dynamic bump must be sometimes readjusted to keep such a high efficiency. In future, diffusers and/or a silicon bend crystal, which are more sensitive to the orbit angle fluctuation, would be introduced to achieve a further high slow extraction efficiency. A long-term stability of the beam position and angle at the ESS1 has been investigated. We observed the fluctuations synchronized with tides and estimated to be due to tunnel expansion.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2020-TUVIR15  
About • paper received ※ 09 June 2020       paper accepted ※ 11 June 2020       issue date ※ 30 July 2020  
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THVIR12 FLASH Radiation Therapy: Accelerator Aspects radiation, electron, linac, photon 71
 
  • A. Patriarca, L. De Marzi, V. Favaudon, S.J. Meyroneinc
    Institut Curie - Centre de Protonthérapie d’Orsay, Orsay, France
 
  One of the new paradigms in radiation therapy (RT) is the FLASH dose delivery irradiation technique. The FLASH methodology consists in delivering millisecond pulses of radiation (total beam-on time < 100-500 ms) delivered at a high mean dose-rate (> 40-100 Gy/s) and pulse amplitude (> 1E6 Gy/s), over 2000 times faster than in conventional RT. New accelerator ideas are under development or are being tested to deliver this type of beam. In this paper we will report the accelerator technology used for the pre-clinical studies and the necessary developments to deliver this novel dose RT technique.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2020-THVIR12  
About • paper received ※ 01 June 2020       paper accepted ※ 12 June 2020       issue date ※ 28 September 2020  
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THVIR13 CERN-MEDICIS: A Unique Facility for the Production of Non-Conventional Radionuclides for the Medical Research target, ISOL, radiation, operation 75
 
  • C. Duchemin, E. Barbero-Soto, A.P. Bernardes, R. Catherall, E. Chevallay, A. Dorsival, V.N. Fedosseev, P. Fernier, S.S. Gilardoni, J.L. Grenard, L. Lambert, G. Lilli, G. Lilli, G. Lunghi, B.A. Marsh, Y. Martinez Palenzuela, S. Marzari, F. Pozzi, J. Riegert, S. Rothe, T. Stora, J. Vollaire, N.-T. Vuong, S. Wilkins
    CERN, Meyrin, Switzerland
  • T.E. Cocolios, R. Heinke
    KU Leuven, Leuven, Belgium
  • F. Haddad
    Cyclotron ARRONAX, Saint-Herblain, France
  • M.A. Khan
    PINSTECH, Islamabad, Pakistan
  • N. Michel
    SUBATECH, Nantes, France
  • J.P. Ramos
    SCK•CEN, Mol, Belgium
  • Z. Talip, N.P. van der Meulen
    PSI, Villigen PSI, Switzerland
  • K. Wendt
    Johannes Gutenberg University Mainz, Institut für Physik, Mainz, Germany
  • K. Wendt
    Mainz University, Mainz, Germany
 
  The MEDICIS facility is a unique facility located at CERN dedicated to the production of non-conventional radionuclides for research and development in imaging, diagnostics and radiation therapy. It exploits in a Class A work sector, a dedicated isotope separator beam line, a target irradiation station at the 1.4 GeV Proton Synchroton Booster (PSB) and receives activated targets from external institutes during CERN Long Shut-Downs. The target is heated up at high temperatures to allow for the diffusion and effusion of the atoms out of the target that are subsequently ionized. The ions are accelerated and sent through an off-line mass separator. The radionuclide of interest is extracted through mass separation and implanted into a thin metallic collection foil. After collection, the batch is prepared to be dispatched to a research center. In the near-future, the radiochemistry process will also be performed in MEDICIS. Since its commissioning in December 2017, the facility has provided novel radionuclides such as Tb-149, Tb-155, Tm-165, Er-169 and Yb-175 with high specific activity, some for the first time, to European research institutes part of the collaboration.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2020-THVIR13  
About • paper received ※ 09 June 2020       paper accepted ※ 12 June 2020       issue date ※ 23 September 2020  
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THVIR15 Accelerators for Applications in Energy and Nuclear Waste Transmutation target, cavity, linac, cyclotron 86
 
  • A. Fabich
    EBG MedAustron, Wr. Neustadt, Austria
  • H. Aït Abderrahim, U. Dorda, D. Vandeplassche
    SCK•CEN, Mol, Belgium
 
  Accelerator Driven Systems (ADS) is a concept using high power proton accelerators in energy production and nuclear waste transmutation. Amongst typical beam performance requirements, the operational reliability of the accelerator is exceptionally demanding. The advantages and challenges of different driver options, like cyclotrons and linacs, are evaluated and worldwide design studies are summarized. The MYRRHA design is based on a 600 MeV superconducting proton linac. The first stage towards its realization was recently approved to be constructed by SCK•CEN in Belgium. The 100 MeV linac will serve as technology demonstrator for MYRRHA as well as driver for independent two target stations, one for fusion material research and one for research and medical isotope production. MYRRHA in its final implementation is envisaged as an international collaboration.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2020-THVIR15  
About • paper received ※ 29 May 2020       paper accepted ※ 25 July 2020       issue date ※ 09 October 2020  
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