Author: Grebenyuk, J.
Paper Title Page
TUOBB01 Accelerator Physics Challenges towards a Plasma Accelerator with Usable Beam Quality 961
 
  • R.W. Aßmann, J. Grebenyuk
    DESY, Hamburg, Germany
 
  Enormous progress in compact plasma accelerators has been demonstrated over the recent years in various experiments. These experiments rely on high power, pulsed lasers or short electron bunches to excite ultra-strong wakefields in plasmas. Accelerating gradients have reached several 10 GV/m up to 100 GV/m and the absolute energy gain of electron beams is in the regime of several GeV to 30 GeV. The principle and potential of plasma accelerators has been proven impressively and performance parameters are steadily improving. It is noted that particle accelerators are powerful tools that are ultimately justified by their applications in science, medicine or industry. The demonstration of useable beam quality and a realistic use case remains to be achieved for plasma accelerators. The accelerator physics challenges to arrive at this goal are analyzed and discussed.  
slides icon Slides TUOBB01 [12.407 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUOBB01  
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TUPME047 SINBAD - A Proposal for a Dedicated Accelerator Research Facility at DESY 1466
 
  • R.W. Aßmann, C. Behrens, R. Brinkmann, U. Dorda, K. Flöttmann, B. Foster, J. Grebenyuk, I. Hartl, M. Hüning, Y.C. Nie, J. Osterhoff, A. Rühl, H. Schlarb, B. Schmidt
    DESY, Hamburg, Germany
  • M. Groß, B. Marchetti, F. Stephan
    DESY Zeuthen, Zeuthen, Germany
  • F.J. Grüner, B. Hidding, A.R. Maier
    Uni HH, Hamburg, Germany
  • F.X. Kärtner, B. Zeitler
    CFEL, Hamburg, Germany
  • A.-S. Müller, M. Schuh
    KIT, Karlsruhe, Germany
 
  A new, dedicated accelerator research facility SINBAD (Short INnovative Bunches and Accelerators at DESY) is proposed. This facility is aimed at promoting two major goals: (1) Short electron bunches for ultra-fast science. (2) Construction of a plasma accelerator module with useable beam quality. Research and development on these topics is presently ongoing at various places at DESY, as add-on experiments at operational facilities. The two research goals are intimately connected: short bunches and precise femtosecond timing are requirements for developing a plasma accelerator module. The scientific case of a dedicated facility for accelerator research at DESY is discussed. Further options are mentioned, like the use of a 1 GeV beam from Linac2 for FEL studies and the setup of an attosecond radiation source with advanced technology. The presently planned conversion of the DORIS storage ring and its central halls into the SINBAD facility is described. The available space will allow setting up several independent experiments with a cost-effective use of the same infrastructure. National and international contributions and proposals can be envisaged.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPME047  
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TUPME064 Laser-driven Acceleration with External Injection at SINBAD 1515
 
  • J. Grebenyuk, R.W. Aßmann, U. Dorda, B. Marchetti
    DESY, Hamburg, Germany
 
  One of the important milestones to make plasma acceleration a realistic technology for user-applications is demonstration of bunch acceleration inside a plasma wake with minimal degradation of its quality. This can be achieved by external injection of beams into a plasma accelerator. SINBAD is a proposed dedicated accelerator research and development facility at DESY where amongst other topics laser-driven wakefield acceleration with external injection of ultra-short bunches will be exploited. To minimise energy-spread growth the bunch should occupy a small fraction of the plasma wavelength. In addition it has to be longitudinally synchronised with the laser driver to high accuracy. To avoid emittance growth the beam Twiss parameters have to be matched to the intrinsic beta-function of the plasma. To facilitate matching and synchronisation, acceleration at low plasma densities can be advantageous. We present a preparatory feasibility study for future plasma experiments at SINBAD using simulations with the particle-in-cell code OSIRIS. Field-gradient scaling laws are presented together with parameter scans of externally injected bunch, such as its injection phase, charge and length.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPME064  
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