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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 9: Diagnostics, Control and Instrumentation II
AKBP 9.1: Talk
Thursday, March 22, 2018, 16:30–16:45, NW-Bau - HS4
In-situ synthetic radiation diagnostics for laser wakefield acceleration — •Richard Pausch1,2, Alexander Debus1, Axel Huebl1,2, Ulrich Schramm1,2, Klaus Steiniger1,2, René Widera1, and Michael Bussmann1 — 1Helmholtz-Zentrum Dresden - Rossendorf — 2TU Dresden
We present recent results of LWFA simulations including in-situ radiation diagnostics performed with the particle-in-cell code PIConGPU. Our results demonstrate the power provided by synthetic radiation diagnostics to determine the laser-plasma dynamics with regard to applications in experiments.
PIConGPU is currently one of the fastest 3D3V particle-in-cell codes and provides an in-situ radiation diagnostic based on Liénard-Wiechert potentials. This synthetic diagnostic is capable of quantitatively predicting the spectrally and directionally resolved far-field radiation of billions of macro-particles by an in-situ implementation in the PIC cycle. Among other things, the code enables resolving the spatial origin and temporal evolution of the radiation, determine the polarization, quantifying both coherent and incoherent radiation simultaneously and covering a frequency range from infrared to x-rays.
The talk briefly introduces the technical background of computing the radiation in-situ on GPUs. Its main focus, however, is the characteristic radiation of LWFA that allows identifying the various stages of the laser-plasma dynamics. Possible applications of these radiation signatures in laboratory experiments will be discussed.