Author: Farabolini, W.
Paper Title Page
WEPAB043 Consolidation and Future Upgrades to the CLEAR User Facility at CERN 2700
 
  • L.A. Dyks, P. Korysko
    Oxford University, Physics Department, Oxford, Oxon, United Kingdom
  • P. Burrows
    JAI, Oxford, United Kingdom
  • R. Corsini, S. Curt, W. Farabolini, D. Gamba, L. Garolfi, A. Gilardi, E. Granados, G. McMonagle, H. Panuganti
    CERN, Meyrin, Switzerland
  • W. Farabolini
    CEA-DRF-IRFU, France
  • A. Gilardi
    University of Napoli Federico II, Napoli, Italy
  • K.N. Sjobak
    University of Oslo, Oslo, Norway
 
  The CERN Linear Electron Accelerator for Research (CLEAR) at CERN has been operating since 2017 as a dedicated user facility providing beams for a varied range of experiments. CLEAR consists of a 20 m long linear accelerator (linac), able to produce beams from a Cs2Te photocathode and accelerate them to energies of between 60 MeV and 220 MeV. Following the linac, an experimental beamline is located, in which irradiation tests, wakefield and impedances tudies, plasma lens experiments, beam diagnostics development, and terahertz (THz) emission studies, are performed. In this paper, we present recent upgrades to the entire beamline, as well as the design of future upgrades, such as a dogleg section connecting to an additional proposed experimental beamline. The gain in performance due to these upgrades is presented with a full range of available beam properties documented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB043  
About • paper received ※ 18 May 2021       paper accepted ※ 24 June 2021       issue date ※ 19 August 2021  
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WEPAB044 Status of VHEE Radiotherapy Related Studies at the CLEAR User Facility at CERN 2704
 
  • R. Corsini, W. Farabolini, A. Gilardi
    CERN, Geneva, Switzerland
  • L.A. Dyks, P. Korysko
    Oxford University, Physics Department, Oxford, Oxon, United Kingdom
  • W. Farabolini
    CEA-DRF-IRFU, France
  • A. Gilardi
    University of Napoli Federico II, Napoli, Italy
  • K.N. Sjobak
    University of Oslo, Oslo, Norway
 
  Despite the increase in interest in using Very High Energy Electron (VHEE) beams for cancer radiotherapy many unanswered questions in its development remain. The use of test facilities will be an essential tool used to solve these issues. The 200 MeV electron beam from the CERN Linear Accelerator for Research (CLEAR) has been used extensively, in collaboration with several research institutes, to perform dosimetry studies and explore potential applications of VHEE beams to radiotherapy, including the exploitation of the so called FLASH effect. In this paper, we present an overview of past studies with emphasis on the more recent results. We describe methods, techniques and equipment developed at CERN in this framework, and give an outlook on future activities.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB044  
About • paper received ※ 18 May 2021       paper accepted ※ 23 June 2021       issue date ※ 27 August 2021  
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FRXC02
Non Invasive Bunch Length Measurements Exploiting Cherenkov Diffraction Radiation  
 
  • S. Mazzoni, M. Bergamaschi, R. Corsini, A. Curcio, W. Farabolini, D. Gamba, L. Garolfi, A. Gilardi, R. Kieffer, M. Krupa, T. Lefèvre, E. Senes, M. Wendt
    CERN, Geneva, Switzerland
  • A. Curcio
    NSRC SOLARIS, Kraków, Poland
  • C. Davut, G.X. Xia
    UMAN, Manchester, United Kingdom
  • W. Farabolini
    CEA-DRF-IRFU, France
  • K.V. Fedorov, P. Karataev, K. Lekomtsev, C. Pakuza
    JAI, Oxford, United Kingdom
  • K.V. Fedorov, A. Potylitsyn
    TPU, Tomsk, Russia
  • J. Gardelle
    CEA, LE BARP cedex, France
  • P. Karataev
    Royal Holloway, University of London, Surrey, United Kingdom
  • T.H. Pacey, Y.M. Saveliev
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • A. Schloegelhofer
    TU Vienna, Wien, Austria
  • E. Senes
    Oxford University, Physics Department, Oxford, Oxon, United Kingdom
 
  Cherenkov Diffraction Radiation (ChDR) refers to the emission of broadband electromagnetic radiation which occurs when a charged particle propagates at relativistic speed in the vicinity of a dielectric material. At variance with the better-known Cherenkov radiation, ChDR is a non-invasive technique, that is the particle beam does not impinge on the dielectric radiator. ChDR also possesses other interesting features like a relatively high light yield, a broadband spectrum of emission and the emission at a relatively large angle with respect to the beam trajectory. Due to its potential, CERN initiated over the last few years several studies on ChDR-based diagnostics techniques. In this contribution I will focus on the exploitation of ChDR for non-invasive bunch length measurement, from proof of principle tests performed at the CLEAR facility at CERN and CLARA at Daresbury laboratory to current developments for experiments and facilities such as AWAKE and FCC  
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WEPAB021 Development and Testing of a Cherenkov Beam Loss Monitor in CLEAR Facility 2640
 
  • S. Benitez Berrocal, E. Effinger, W. Farabolini, A. Gilardi, P. Korysko, E. Lima, B. Salvachua, W. Viganò
    CERN, Meyrin, Switzerland
  • P. Lane
    University of Huddersfield, Huddersfield, United Kingdom
 
  Beam Loss Monitors are fundamental diagnostic systems in particle accelerators. Beam losses are measured by a wide range of detectors with excellent results; most of these devices are used to measure local beam losses. However, in some accelerators there is the need to measure beam losses continuously localized over longer distances i.e., several tens of meters. For this reason, a beam loss detector based on long optical fibres is now under study. As part of the design, several simulations, comparing different possible detection scenarios, have been performed in FLUKA and bench-marked with experimental data. An experimental campaign was performed with an electron beam in the CERN Linear Electron Accelerator for Research (CLEAR) in November 2020. The light emitted from the optical fibre was captured using Silicon Photo-Multipliers (SiPM) coupled at each fibre’s end. In this poster, the first results of a beam loss detector based on the capture of Cherenkov photons generated by charged particles inside multimode silica fibres are presented.  
poster icon Poster WEPAB021 [0.724 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB021  
About • paper received ※ 18 May 2021       paper accepted ※ 21 June 2021       issue date ※ 31 August 2021  
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