Author: Cowan, T.E.
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MOPRI069 Computing Angularly-resolved Far Field Emission Spectra in Particle-in-cell Codes using GPUs 761
 
  • R.G. Pausch, H. Burau, M.H. Bussmann, J.P. Couperus, A.D. Debus, A. Huebl, A. Irman, A. Köhler, U. Schramm, K. Steiniger, R. Widera
    Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiation Physics, Dresden, Germany
  • T.E. Cowan
    HZDR, Dresden, Germany
 
  Angularly resolved far field radiation spectra computed from the Lienard Wiechert Potentials of accelerated electrons give information on the microscopic particle dynamics. We present recent results using our many-GPU, fully relativistic 3D3V particle-in-cell code PIConGPU for which we have developed fully synthetic radiation diagnostics that is capable of computing angularly-resolved radiation spectra of more than 1010 electrons for several hundred to a thousand wavelengths and directions in a single simulation in less than a day on large-scale supercomputers. With such a technique it is possible to use precision spectroscopic methods for understanding the dynamics of electron acceleration in scenarios where other diagnostics fail. We present studies on laser-driven wakefield acceleration and astrophysical jet dynamics to underline the power of this new technique.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI069  
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WEXB01 Breaking the 70 MeV Proton Energy Threshold in Laser Proton Acceleration and Guiding Beams to Applications 1886
 
  • M. Roth, S. Bedacht, S. Busold, O. Deppert, G. Schaumann, A. Tebartz, F. Wagner
    TU Darmstadt, Darmstadt, Germany
  • V. Bagnoud, A. Blazevic, D. Schumacher
    GSI, Darmstadt, Germany
  • C. Brabetz
    IAP, Frankfurt am Main, Germany
  • T.E. Cowan
    HZDR, Dresden, Germany
  • K. Falk, A. Favalli, J.C. Fernandez, C. Gautier, C.E. Hamilton, R.P. Johnson, K. Schoenberg, T. Shimada, G.A. Wurden
    LANL, Los Alamos, New Mexico, USA
  • M. Geißel, M. Schollmeier
    Sandia National Laboratories, Albuquerque, New Mexico, USA
  • D. Jung
    Queen's University of Belfast, Belfast, Northern Ireland, United Kingdom
  • F. Kroll
    Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiation Physics, Dresden, Germany
 
  This talk covers recent developments in laser plasma ion acceleration describing the technological challenges in breaking of energy threshold of 70 MeV. The presentation also highlights the recent experimental achievements towards laser ion acceleration and transport in the LIGHT collaboration.  
slides icon Slides WEXB01 [15.155 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEXB01  
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WEPRO053 All-optical Free Electron Lasers using Travelling-wave Thomson Scattering 2065
 
  • K. Steiniger, M.H. Bussmann, A.D. Debus, A. Irman, A. Jochmann, R.G. Pausch, U. Schramm
    Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiation Physics, Dresden, Germany
  • T.E. Cowan
    HZDR, Dresden, Germany
 
  In Travelling-Wave Thomson Scattering (TWTS) the pulse front of a high-power, short-pulse laser is tilted and the dispersion of the pulse is controlled in such a way that electrons can interact over a long distance with a quasi-monochromatic electromagnetic wave. We present a complete three dimensional analytic time-dependent description of the TWTS field and use this description to derive an analytic FEL equation that shows that TWTS indeed provides for an all-optical FEL. We further derive conditions for optimum operation of the TWTS FEL, showing that EUV and XUV FEL sources are in reach using Petawatt lasers and conventional few-hundred MeV electron sources. Future laser-wakefield accelerators could potentially drive all-optical TWTS-FELs in the X-ray and beyond. TWTS itself is optimum to provide full flexibility in terms of the wavelength and bandwidth of the scattered radiation, allowing for application-optimized, highly-brilliant Thomson Scattering sources for a broad range of wavelengths from the EUV to the gamma ray spectral region.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO053  
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WEPRO113 Status of the Radiation Source ELBE Upgrade 2233
 
  • P. Michel, T.E. Cowan, U. Lehnert, U. Schramm
    HZDR, Dresden, Germany
 
  ELBE is based on a 40 MeV superconducting Electron Linac able to operate in CW mode and provides manifold secondary user beams. The suite of secondary beams include: two free electron lasers operating in the IR/THz regime; a fast neutron beam; a Bremsstrahlung gamma-ray beam; a low-energy positron beam; and patented single-electron test beams. The primary electron beam is also used for radiobiology research, or in interaction with ultra-intense PW-class lasers. Through 2014 ELBE will be upgraded to a Centre for High Power Radiation Sources. The ELBE beam current was increased to 1.6 mA by using novel solid state RF amplifiers. The concept also contains additional broad and narrow band coherent THz sources and the development of a 500 TW TiSa Laser and even a 1.5 PW diode pumped laser system. Laser plasma electron acceleration and proton acceleration experiments for medical applications are planned. Additionally, coupled electron laser beam experiments like Thomson scattering or injection of ELBE electron into the laser plasma will be done.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO113  
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