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arXiv · 1802.03972

Quantitatively consistent computation of coherent and incoherent radiation in particle-in-cell codes - a general form factor formalism for macro-particles

Richard Pausch·Alexander Debus·Axel Huebl·Ulrich Schramm·Klaus Steiniger·René Widera·Michael Bussmann
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Abstract

Quantitative predictions from synthetic radiation diagnostics often have to consider all accelerated particles. For particle-in-cell (PIC) codes, this not only means including all macro-particles but also taking into account the discrete electron distribution associated with them. This paper presents a general form factor formalism that allows to determine the radiation from this discrete electron distribution in order to compute the coherent and incoherent radiation self-consistently. Furthermore, we discuss a memory-efficient implementation that allows PIC simulations with billions of macro-particles. The impact on the radiation spectra is demonstrated on a large scale LWFA simulation.

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Richard Pausch, Alexander Debus, Axel Huebl, Ulrich Schramm, Klaus Steiniger, René Widera, Michael Bussmann. 2018-02-12. Quantitatively consistent computation of coherent and incoherent radiation in particle-in-cell codes - a general form factor formalism for macro-particles. https://doi.org/10.1016/j.nima.2018.02.020

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