Dresden 2017 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 7: Synchrotron Radiation and FELs
AKBP 7.5: Vortrag
Donnerstag, 23. März 2017, 10:30–10:45, MOL 213
Self-consistently modeling Traveling-Wave Thomson-Scattering Optical Free-Electron Lasers — •Alexander Debus1, Richard Pausch1,2, Klaus Steiniger1,2, Daniel Albach1, Markus Loeser1, Ulrich Schramm1,2, Mathias Siebold1, and Michael Bussmann1 — 1Helmholtz-Zentrum Dresden - Rossendorf — 2Technische Universität Dresden
Traveling-Wave Thomson-Scattering (TWTS) provides optical undulators with hundreds to thousands of undulator periods from high-power, pulse-front tilted lasers pulses. These allow to realize optical free-electron lasers (OFELs) with state-of-the-art technology in electron accelerators and laser systems.
TWTS employs a side-scattering geometry where laser and electron propagation direction of motion enclose the interaction angle. Tilting the laser pulse front with respect to the wave front by half the interaction angle ensures continuous overlap over the whole laser pulse width while the electrons cross the laser beam path.
Scaling laws and analytical models allow identifying experimentally promising FEL regimes in feasible setup geometries. However, self-consistently including all non-ideal effects in 3D FEL simulations is desirable for predicting TWTS-OFEL designs with quantitative performance and tolerance characteristics suitable for engineering an optimal proof-of-principle experiment. In this talk we outline the challenges of existing FEL codes that cannot cope with the non-collinear geometry of TWTS-OFELs, show how we solve these using the particle-in-cell code PIConGPU as 3D-FEL code and present first results.