Collisionless simulation of nonlinear plasma dynamics is one of the outstanding problems of plasma physics as well as a strong challenge in computational physics. Here, a crucial test for the theoretical study of collisionless plasmas based on large scale numerical simulations is proposed. Plasma echoes are shown to provide a highly selective benchmark for the algorithms adopted in order to follow the collisionless, Hamiltonian dynamics of high temperature, rarefied plasmas described by the Vlasov-Poisson system of equations. The proposed test is more discriminating than those based on the conservation of (a finite set of) Casimir invariants and gives a deeper insight on the numerical dissipative processes at play. (c) 2006 Elsevier B.V. All rights reserved.

"Echography" of Vlasov codes

CALIFANO, FRANCESCO;PEGORARO, FRANCESCO
2006-01-01

Abstract

Collisionless simulation of nonlinear plasma dynamics is one of the outstanding problems of plasma physics as well as a strong challenge in computational physics. Here, a crucial test for the theoretical study of collisionless plasmas based on large scale numerical simulations is proposed. Plasma echoes are shown to provide a highly selective benchmark for the algorithms adopted in order to follow the collisionless, Hamiltonian dynamics of high temperature, rarefied plasmas described by the Vlasov-Poisson system of equations. The proposed test is more discriminating than those based on the conservation of (a finite set of) Casimir invariants and gives a deeper insight on the numerical dissipative processes at play. (c) 2006 Elsevier B.V. All rights reserved.
2006
Galeotti, L; Califano, Francesco; Pegoraro, Francesco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/181829
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