Author: Marroncle, J.
Paper Title Page
MOBO04 Characterization and First Beam Loss Detection with One ESS-nBLM System Detector 28
 
  • L. Segui, H. Alves, S. Aune, J. Beltramelli, Q. Bertrand, M. Combet, M. Kebbiri, Ph. Legou, O. Maillard, A. Marcel, T. Papaevangelou
    CEA-IRFU, Gif-sur-Yvette, France
  • A. Dano-Daguze, D. Desforge, F. Gougnaud, T.J. Joannem, C. Lahonde-Hamdoun, P. Le Bourlout, Y. Mariette, J. Marroncle, V. Nadot, G. Tsiledakis
    CEA-DRF-IRFU, France
  • I. Dolenc Kittelmann, T.J. Shea
    ESS, Lund, Sweden
 
  The monitoring of losses is crucial in any accelerator. In the new high intensity hadron facilities even low energy beam can damage or activate the materials so the detection of small losses in this region is very important. A new type of neutron beam loss monitor has been developed specifically targeting this region, where only neutrons and photons can be produced and where typical BLM, based on charged particle detection, could not be appropriate because of the photon background due to the RF cavities. The BLM proposed is based on gaseous Micromegas detectors, designed to be sensitive to fast neutrons and with little sensitivity to photons. Development of the detectors presented here has been done to fulfil the requirements of ESS and they will be part of the ESS-BI systems. The detector has been presented in previous editions of the conference. Here we focus on the neutron/gamma rejection with the final FEE and in the first operation of one of the modules in a beam during the commissioning of LINAC4 (CERN) with the detection of provoked losses and their clear separation from RF gammas. The ESS-nBLM system is presented in this conference in a separate contribution.  
slides icon Slides MOBO04 [7.609 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOBO04  
About • paper received ※ 05 September 2019       paper accepted ※ 09 September 2019       issue date ※ 10 November 2019  
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TUPP006 Transverse Emittance Measurement of a 2.5 MeV Proton Beam on LIPAc, IFMIF’s Prototype 283
 
  • J. Marroncle, P. Abbon, B. Bolzon, T. Chaminade, N. Chauvin, S. Chel, J.F. Denis, A. Gaget
    CEA-DRF-IRFU, France
  • T. Akagi, K. Kondo, M. Sugimoto
    QST, Aomori, Japan
  • L. Bellan, M. Comunian, E. Fagotti, F. Grespan, A. Pisent, F. Scantamburlo
    INFN/LNL, Legnaro (PD), Italy
  • P. Cara
    IFMIF/EVEDA, Rokkasho, Japan
  • H. Dzitko, D. Gex, A. Jokinen
    F4E, Germany
  • J.M. García, D. Jiménez-Rey, A. Ros, V. Villamayor
    CIEMAT, Madrid, Spain
  • A. Rodríguez Páramo
    ESS Bilbao, Zamudio, Spain
 
  IFMIF (International Fusion Materials Irradiation Fa-cility) is an accelerator-driven neutron source aiming at testing fusion reactor materials. Under the Broader Ap-proach Agreement, a 125 mA / 9 MeV CW deuteron accelerator called LIPAc (Linear IFMIF Prototype Accel-erator) is currently under installation and commissioning at Rokkasho, Japan, to validate the IFMIF accelerator. During the beam commissioning at 5 MeV which started in June 2018, the horizontal and vertical transverse emit-tance of a 2.5 MeV proton beam have been measured downstream of the RFQ for different machine configura-tions. Such measurements were done with an emittance measurement unit composed of slits defining a beamlet of 200 µm width, then of steerers and finally of a SEM grids monitor. In this paper, the process and the system are first described. The secondary electron emission of SEM-Grid wires is then estimated based on measure-ments and results are close to the usual rule of thumb. Finally, emittance measurements are presented and comparisons with beam dynamics simulations show good agreement.  
poster icon Poster TUPP006 [1.974 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP006  
About • paper received ※ 02 September 2019       paper accepted ※ 08 September 2019       issue date ※ 10 November 2019  
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MOBO03
Overview of LIPAc Beam Instrumentation for the Initial Accelerator Commissioning  
 
  • D. Jimenez-Rey, J. Castellanos, J.M. García, D. Gavela, A. Ibarra, A. Marqueta, L.M. Martínez, J. Mollá, I. Podadera, A. Ros, R. Varela, V. Villamayor
    CIEMAT, Madrid, Spain
  • P. Abbon, B. Bolzon, T. Chaminade, J.F. Denis, A. Gaget
    CEA-DRF-IRFU, France
  • T. Akagi, K. Kondo, K. Sakamoto, Y. Shimosaki, M. Sugimoto, S. Takahiro
    QST, Aomori, Japan
  • L. Bellan, M. Comunian, E. Fagotti, F. Grespan, M. Poggi, F. Scantamburlo
    INFN/LNL, Legnaro (PD), Italy
  • P. Cara, A. Marqueta
    Fusion for Energy, Garching, Germany
  • Y. Carin, H. Dzitko, A. Jokinen, I.M. Moya
    F4E, Germany
  • J. Marroncle
    CEA-IRFU, Gif-sur-Yvette, France
  • O. Nomen
    IREC, Sant Adria del Besos, Spain
  • A. Rodríguez Páramo
    ESS Bilbao, Zamudio, Spain
 
  Funding: This work has been supported by the Spanish Government in the frame of the Broader Approach Agreement
The commissioning of the high power deuterium accelerator of Linear IFMIF Prototype Accelerator, LIPAc, is presently under progress. During the so-called Phase B, the accelerator is operating with a high current pulsed proton and deuteron. The Phase B operation has the goals of fulfilling an exhaustive characterization of equipment and machine parameters in pulsed beam operation up to 5 MeV and 125 mA at Low Duty Cycle. The LIPAc beam diagnostics are aimed to demonstrate at this first stage of the commissioning the correct performance of the accelerator and are used for a complete characterization of the accelerator matching and tuning parameters. The characterization and calibration of beam diagnostics developed are providing relevant feedback of the accelerator operation. Measurements of the centroid position, beam profile, energy, intensity or emittance have been acquired and analyzed. The experimental results gathered have been compared with beam dynamics simulations. In this contribution, an overview of the main results provided by the beam diagnostics during Phase B operation in proton will be shown, together with the status of each instrument.
 
slides icon Slides MOBO03 [13.512 MB]  
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