Author: Williams, P.H.
Paper Title Page
THA1WA04
 A Staged, Multi-User X-Ray Free Electron Laser & Nuclear Physics Facility Based on a Multi-Pass Recirculating Superconducting CW Linac  
 
  • P.H. Williams, D. Angal-Kalinin, A.D. Brynes, J.A. Clarke, L.S. Cowie, D.J. Dunning, P. Goudket, F. Jackson, J.K. Jones, P.A. McIntosh, B.L. Militsyn, A.J. Moss, B.D. Muratori, S.L. Smith, M. Surman, N. Thompson, A.E. Wheelhouse
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • J.A.G. Akkermans
    ASML Netherlands B.V., Veldhoven, The Netherlands
  • D. Angal-Kalinin, I.R. Bailey, A.D. Brynes, J.A. Clarke, L.S. Cowie, D.J. Dunning, P. Goudket, F. Jackson, J.K. Jones, P.A. McIntosh, B.W.J. MᶜNeil, B.L. Militsyn, A.J. Moss, B.D. Muratori, H.L. Owen, S.L. Smith, M. Surman, N. Thompson, A.E. Wheelhouse, P.H. Williams
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • I.R. Bailey
    Lancaster University, Lancaster, United Kingdom
  • S.V. Benson, D. Douglas, Y. Roblin, T. Satogata, M. F. Spata, C. Tennant
    JLab, Newport News, Virginia, USA
  • T.K. Charles
    The University of Melbourne, Melbourne, Victoria, Australia
  • T.K. Charles
    CERN, Geneva, Switzerland
  • B.W.J. MᶜNeil
    USTRAT/SUPA, Glasgow, United Kingdom
  • H.L. Owen
    UMAN, Manchester, United Kingdom
  • R.C. York
    FRIB, East Lansing, Michigan, USA
  
  A multi-pass recirculating superconducting CW linac offers a cost effective path to a multi-user facility with unprecedented scientific and industrial reach over a wide range of disciplines. We propose such a facility to be constructed in stages. The first stage constitutes an option for a potential UK-XFEL; the linac will simultaneously drive a suite of short wavelength Free Electron Lasers (FELs) capable of providing high average power (MHz repetition rate) at up to 10 keV photons and high pulse energy (3 mJ) 25 keV photons. The system architecture is chosen to enable additional coherent sources at longer wavelengths, depending on community need. In later stages the scope of the project expands; we propose beam transport modifications to enable operation in Energy Recovery mode. This enables multi-MHz FEL sources, e.g. an X-ray FEL oscillator. Combining with lasers and / or self-interaction will provide access to MeV and GeV gamma-rays via inverse Compton scattering at high average power. Opportunities are also created for internal target and fixed target experiments. We explore possible system architectures and outline a path to confirm feasibility through experiments.  
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THA1WA03 GPT-CSR: A New Simulation Code for CSR Effects 157
 
  • S.B. van der Geer, M.J. de Loos
    Pulsar Physics, Eindhoven, The Netherlands
  • I. Setija, P.W. Smorenburg
    ASML Netherlands B.V., Veldhoven, The Netherlands
  • P.H. Williams
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  
  For future applications of high-brightness electron beams, including the design of next generation FEL's, correct correct simulation of Coherent Synchrotron Radiation (CSR) is essential as it potentially degrades beam quality to unacceptable levels. However, the long interaction lengths compared to the bunch length, numerical cancellation, and difficult 3D retardation conditions make accurate simulation of CSR effects notoriously difficult. To ease the computational burden, CSR codes often make severe simplifications such as an ultra relativistic bunch travelling on a prescribed reference trajectory. Here we report on a new CSR model, implemented in the General Particle Tracer (GPT) code, that avoids most of the usual assumptions: It directly evaluates the Lienard-Wiechert potentials based on the stored history of the beam, it makes no assumptions about reference trajectories, while also taking into account the transverse size of the beam. First results demonstrating microbunching gain in a chicane are presented.  
slides icon Slides THA1WA03 [1.799 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FLS2018-THA1WA03  
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