87 citations · 573 across the 31 of their papers we have counts for
8 papers · 1 filter
Neoclassical Pitch-Angle Scattering of Runaway Electrons
Jian Liu, Yulei Wang, Hong Qin
It is discovered that the tokamak field geometry generates a pitch-angle scattering effect for runaway electrons. This neoclassical pitch-angle scattering is much stronger than the…
Explicit high-order non-canonical symplectic particle-in-cell algorithms for Vlasov-Maxwell systems
Jianyuan Xiao, Hong Qin, Jian Liu +3
Explicit high-order non-canonical symplectic particle-in-cell algorithms for classical particle-field systems governed by the Vlasov-Maxwell equations are developed. The algorithm…
Explicit non-canonical symplectic algorithms for charged particle dynamics
Yang He, Yajuan Sun, Zhaoqi Zhou +2
We study the non-canonical symplectic structure, or K-symplectic structure inherited by the charged particle dynamics. Based on the splitting technique, we construct non-canonical…
Variational Symplectic Particle-in-cell Simulation of Nonlinear Mode Conversion from Extraordinary waves to Bernstein Waves
Jianyuan Xiao, Jian Liu, Hong Qin +2
In this paper, the nonlinear mode conversion of extraordinary waves in nonuniform magnetized plasmas is studied using the variational symplectic particle-in-cell simulation. The ac…
Hamiltonian integration methods for Vlasov-Maxwell equations
Yang He, Hong Qin, Yajuan Sun +3
Hamiltonian integration methods for the Vlasov-Maxwell equations are developed by a Hamiltonian splitting technique. The Hamiltonian functional is split into five parts, i.e., the…
Comment on "Hamiltonian splitting for the Vlasov-Maxwell equations"
Hong Qin, Yang He, Ruili Zhang +3
The paper [1] by Crouseilles, Einkemmer, and Faou used an incorrect Poisson bracket for the Vlasov-Maxwell equations. If the correct Poisson bracket is used, the solution of one of…
What is the fate of runaway positrons in tokamaks?
Jian Liu, Hong Qin, Nathaniel J. Fisch +2
Massive runaway positrons are generated by runaway electrons in tokamaks. The fate of these positrons encodes valuable information about the runaway dynamics. The phase space dynam…
Canonical symplectic particle-in-cell method for long-term large-scale simulations of the Vlasov-Maxwell system
Hong Qin, Jian Liu, Jianyuan Xiao +7
Particle-in-Cell (PIC) simulation is the most important numerical tool in plasma physics. However, its long-term accuracy has not been established. To overcome this difficulty, we…