Lawrence Berkeley National Laboratory
Quantitatively consistent computation of coherent and incoherent radiation in particle-in-cell codes—A general form factor formalism for macro-particles
- Author(s): Pausch, R
- Debus, A
- Huebl, A
- Schramm, U
- Steiniger, K
- Widera, R
- Bussmann, M
- et al.
Published Web Locationhttps://doi.org/10.1016/j.nima.2018.02.020
© 2018 Elsevier B.V. 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.