We present a numerical code (AViDA) specifically designed to address multi-scale plasma physics problems where small-scale high accuracy and low noise level is requested even during the non linear regime to guarantee a clean description of the plasma dynamics at fine spatial wavelengths scales. The algorithm provides a low-noise description of proton and electron kinetic dynamics, by splitting in time the multi-advection Vlasov equation in phase space. Maxwell equations for the electric and magnetic fields are reorganized according to Darwin approximation to remove light waves. Several numerical tests show that AViDA successfully reproduces the propagation of linear and nonlinear waves and captures the physics of magnetic reconnection. We also discuss preliminary tests of the parallelization algorithm efficiency, performed at CINECA on the Marconi-KNL cluster. AViDA will allow to run Eulerian simulations of a non-relativistic fully kinetic collisionless plasma and it is expected to provide relevant insights on important problems of plasma astrophysics such as, for instance, the development of the turbulent cascade at electron scales and the onset of magnetic reconnection

ViDA: a VlasovDArwin solver for plasma physics at electron scales

Giulia Cozzani
Co-primo
;
Francesco Califano
Co-primo
;
2019-01-01

Abstract

We present a numerical code (AViDA) specifically designed to address multi-scale plasma physics problems where small-scale high accuracy and low noise level is requested even during the non linear regime to guarantee a clean description of the plasma dynamics at fine spatial wavelengths scales. The algorithm provides a low-noise description of proton and electron kinetic dynamics, by splitting in time the multi-advection Vlasov equation in phase space. Maxwell equations for the electric and magnetic fields are reorganized according to Darwin approximation to remove light waves. Several numerical tests show that AViDA successfully reproduces the propagation of linear and nonlinear waves and captures the physics of magnetic reconnection. We also discuss preliminary tests of the parallelization algorithm efficiency, performed at CINECA on the Marconi-KNL cluster. AViDA will allow to run Eulerian simulations of a non-relativistic fully kinetic collisionless plasma and it is expected to provide relevant insights on important problems of plasma astrophysics such as, for instance, the development of the turbulent cascade at electron scales and the onset of magnetic reconnection
2019
Pezzi, Oreste; Cozzani, Giulia; Califano, Francesco; Valentini, Francesco; Guarrasi, Massimiliano; Camporeale, Enrico; Brunetti, Gianfranco; Retino', Alessandro; Veltri, Pierluigi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1003842
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