Würzburg 2018 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 2: New Accelerator Concepts
AKBP 2.2: Talk
Monday, March 19, 2018, 16:15–16:30, NW-Bau - HS2
Breaking the dephasing and depletion limits of laser-wakefield acceleration with Traveling-Wave Electron Acceleration — •Alexander Debus1, Richard Pausch1,2, Axel Hübl1,2, Klaus Steiniger1,2, René Widera1, Tom Cowan1,2, Ulrich Schramm1,2, and Michael Bussmann1 — 1Helmholtz-Zentrum Dresden - Rossendorf (HZDR), 5 Bautzner Landstraße 400, 01328 Dresden, Germany — 2Technische Universität Dresden, 01062 Dresden, Germany
We show how to simultaneously solve several long standing limitations of laser-wakefield acceleration that have thus far prevented laser-plasma electron accelerators (LWFA) to extend into the energy realm beyond 10 GeV. Most prominently, our novel Traveling-Wave Electron Acceleration (TWEAC) approach eliminates both the dephasing and depletion constraints. The wakefield driver is a region of overlap of two obliquely incident, ultrashort laser pulses with tilted pulse-fronts in the line foci of two cylindrical mirrors, aligned to coincide with the trajectory of subsequently accelerated electrons. TWEAC leads to quasi-static acceleration conditions, which do not suffer from laser self-phase modulation, parasitic self-injection or other plasma instabilities. Particularly, and in contrast to LWFA and PWFA, a single TWEAC-stage can arbitrarily be extended in length to higher electron energies without changing the underlying acceleration mechanism. We introduce the new acceleration scheme, show results from 3D particle-in-cell simulations using PIConGPU, discuss energy scalability for both laser and electrons and elaborate on experimental realization requirements.