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TUVIR11 IFMIF/EVEDA RFQ Beam Commissioning at Nominal 125 mA Deuteron Beam in Pulsed Mode rfq, LEBT, emittance, cavity 21
  • F. Grespan, L. Bellan, M. Comunian, E. Fagotti, A. Palmieri, F. Scantamburlo
    INFN/LNL, Legnaro (PD), Italy
  • T. Akagi, Y. Hirata, K. Kondo, Y. Shimosaki, T. Shinya, M. Sugimoto
    QST, Aomori, Japan
  • B. Bolzon, N. Chauvin, J. Marroncle
    CEA-IRFU, Gif-sur-Yvette, France
  • P. Cara
    IFMIF/EVEDA, Rokkasho, Japan
  • H. Dzitko, A. Jokinen, I.M. Moya
    F4E, Germany
  • D. Jimenez-Rey, I. Podadera
    CIEMAT, Madrid, Spain
  • A. Marqueta
    Fusion for Energy, Garching, Germany
  • Á. Rodríguez Páramo
    ESS Bilbao, Zamudio, Spain
  In summer 2019 the IFMIF/EVEDA Radio Frequency Quadrupole (RFQ) accelerated its nominal 125 mA deuteron beam current up to 5 MeV, with 90% transmission for pulses of 1 ms at 1Hz. The Linear IFMIF Prototype Accelerator (LIPAc) is a high intensity deuteron linear accelerator; it is the demonstrator of the International Fusion Material Irradiation Facility (IFMIF). In particular the RFQ is the longest and most powerful ever operated. An intense campaign of measurements have been performed in Rokkasho to characterize several performances of this complex machine: transmission, emittances, energy spectrum and beam loading. The history and the results of the commissioning until this important project milestone are here described. An overview of the activities planned to reach CW operation is also presented.  
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DOI • reference for this paper ※  
About • paper received ※ 31 May 2020       paper accepted ※ 17 August 2020       issue date ※ 09 October 2020  
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TUVIR14 The SIS100 RF Systems - Updates and Recent Progress cavity, LLRF, power-supply, acceleration 26
  • J.S. Schmidt, R. Balß, M. Frey, P. Hülsmann, H. Klingbeil, H.G. König, U. Laier, D.E.M. Lens, A. Stuhl
    GSI, Darmstadt, Germany
  Within the FAIR (Facility for Antiproton and Ion Research) accelerator complex, the SIS100 synchrotron will provide high intensity proton to heavy ion beams to the various beam lines and storage rings. This paper presents the recent progress of the SIS100 overall RF system in its preparation towards installation. The RF system is split into four separate sub-systems with a significant number of RF stations. Each RF station consists of a ferrite or MA loaded cavity, a tetrode-based power amplifier, a switching mode power supply unit and various analogue or digital LLRF components for feedback and feedforward control. Fourteen ferrite cavities will generate the accelerating field, while nine cavities loaded with magnetic alloy ring cores are used for bunch compression. The barrier bucket system, which is used to apply a pre-compression of the beam, as well as the longitudinal feedback system for stabilization of beam oscillations will be realized by in total four cavities of the same type.  
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DOI • reference for this paper ※  
About • paper received ※ 03 June 2020       paper accepted ※ 11 June 2020       issue date ※ 10 August 2020  
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TUVIR15 Long-Term Beam Position and Angle Stabilities for the J-Parc Main Ring Slow Extraction extraction, proton, septum, experiment 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 ※  
About • paper received ※ 09 June 2020       paper accepted ※ 11 June 2020       issue date ※ 30 July 2020  
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WEVIR11 Safety System for the Respect of Nuclear Requirements of SPIRAL2 Facility controls, experiment, linac, ISOL 57
  • P. Anger, V.C. Cingal, JC-P. Pacary, S.P.G. Perret-Gatel, A. Savalle
    GANIL, Caen, France
  The SPIRAL2 Facility at GANIL is based on the construction of a superconducting ion CW LINAC (up to 5 mA - 40 MeV deuteron beams and up to 1 mA - 14.5 MeV/u heavy ion beams) with 2 experimental areas called S3 and NFS. For safety classified systems, SPIRAL2 project system engineering sets up a specific reinforced process, based on V-Model, to validate, at each step, all the requirements (technical, nuclear safety, quality, reliability, interfaces…) from the functional specifications to the final validation. Since 2016, safety devices have been under construction and in test phase. These tests which are pre-requisites to deliver the first beam demonstrated that both functional and safety requirements are fulfilled. Currently, all of them are in operation for the LINAC and NFS commissioning phases. This contribution will describe the requirements, the methodology, the quality processes, the technical studies, the failure mode and effects analysis, the tests, the status and will propose you a feedback.  
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DOI • reference for this paper ※  
About • paper received ※ 01 June 2020       paper accepted ※ 14 June 2020       issue date ※ 15 June 2020  
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THVIR13 CERN-MEDICIS: A Unique Facility for the Production of Non-Conventional Radionuclides for the Medical Research target, ISOL, proton, radiation 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 ※  
About • paper received ※ 09 June 2020       paper accepted ※ 12 June 2020       issue date ※ 23 September 2020  
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THVIR14 Development of a Hybrid Electron Accelerator System for the Treatment of Marine Diesel Exhaust Gases electron, radiation, MMI, plasma 80
  • T. Torims, K. Kravalis, G. Pikurs, A. Ruse
    Riga Technical University, Riga, Latvia
  • A.G. Chmielewski, A. Pawelec, Z. Zimek
    Institute of Nuclear Chemistry and Technology, Warsaw, Poland
  • G. Mattausch
    Fraunhofer FEP, Dresden, Germany
  • M. Vretenar
    CERN, Meyrin, Switzerland
  Funding: This project has received funding from the European Union’s Horizon 2020 Research and Innovation programme under Grant Agreement No 730871
Project seeks to tackle the shipping industry’s most pressing problem, its large-scale emissions of SOx, NO and PM, by developing a hybrid exhaust gas-cleaning technology that combines an EB accelerator with improved wet-scrubbing technology. It is unique - in a single technological system - addresses all three types of emissions simultaneously. It promises to be cheaper and more efficient than existing solutions. There are two main stages involved: 1) SO2 and NOx oxidation during irradiation of wet gases by the EB from the accelerator and 2) the pollution products absorption into aqueous solution. For the very first time, test trials in the real maritime environment where conducted and attracted interest of maritime industry, policy makers and accelerator community. Proof-of-Concept clearly confirmed potential of this accelerator technology and formed basis for the full-scale project where this hybrid system will be applied to the sea-going ferry on the regular traffic. Considering that this project is of highest relevance to the accelerator community at large, we will be happy to present it and disseminate its promising results along with the related unfolding activities.
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DOI • reference for this paper ※  
About • paper received ※ 01 June 2020       paper accepted ※ 11 June 2020       issue date ※ 25 June 2020  
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