2 citations · 5 across the 11 of their papers we have counts for
11 papers
Resonant Pitch-Angle Scattering Of Runaway-Electrons by Externally-launched Helicon Waves in the DIII-D Tokamak
Hari Choudhury, Jeffrey Lestz, Carlos Paz-Soldan +12
Resonant wave-particle interactions between externally launched helicon waves (also known as whistler waves) and runaway electrons (REs) have been demonstrated on the DIII-D tokama…
Wave-Energy Partition Governs Weak Collisional Damping in Cold Plasmas
Yanzeng Zhang, Xianzhu Tang, Xingming Zeng +1
Weak dissipation can control wave propagation, mode competition, and instability thresholds in plasmas, yet the physical origin of large branch-to-branch differences in collisional…
Excitation of whistler and slow-X waves by runaway electrons in a collisional plasma
Qile Zhang, Yanzeng Zhang, Xian-Zhu Tang
Runaway electrons are known to provide robust ideal or collisionless kinetic drive for plasma wave instabilities in both the whistler and slow-X branches, via the anomalous Doppler…
Collisionless ablative plasma shocks
Yanzeng Zhang, Xian-Zhu Tang
An ablative plasma shock can emanate from the interface between a cold/dense plasma and a hot/dilute ambient plasma, where the plasma mean-free-path is much longer than the tempera…
Distinct parallel electrostatic collisionless shocks in hot-cold ablative mixing plasmas
Yanzeng Zhang, Xian-Zhu Tang
Hot-cold ablative mixing plasmas are ubiquitous in astrophysical and laboratory systems, where a cold/dense plasma is roughly in pressure balance with a hot/dilute plasma. Examples…
Similarity for downscaled kinetic simulations of electrostatic plasmas: reconciling the large system size with small Debye length
Yanzeng Zhang, Haotian Mao, Yuzhi Li +1
A simple similarity has been proposed for kinetic (e.g., particle-in-cell) simulations of plasma transport that can effectively address the longstanding challenge of reconciling th…
Large radiation back-flux from Monte Carlo simulations of fusion neutron-material interactions
Michael A. Lively, Danny Perez, Blas Uberuaga +2
Radiation back-fluxes, generated from neutron-material interactions in fusion power reactors, can dramatically impact the plasma dynamics, e.g., by seeding runaway electrons during…
Self-mediation of runaway electrons via self-excited wave-wave and wave-particle interactions
Qile Zhang, Yanzeng Zhang, Qi Tang +1
Nonlinear dynamics of runaway electron induced wave instabilities can significantly modify the runaway distribution critical to tokamak operations. Here we present the first-ever f…
Collisionless cooling of perpendicular electron temperature in the thermal quench of a magnetized plasma
Yanzeng Zhang, Jun Li, Xianzhu Tang
Thermal quench of a nearly collisionless plasma against a cooling boundary or region is an undesirable off-normal event in magnetic fusion experiments, but an ubiquitous process of…
Rapid assimilation of high-Z impurity ions along the magnetic field line from an ablated pellet
Haotian Mao, Yanzeng Zhang, Xianzhu Tang
The assimilation of ablated high-Z impurities into the hot surrounding plasma along the magnetic field is investigated by first-principles kinetic simulations. It is found that the…
Stand-off runaway electron beam termination by tungsten particulates for tokamak disruption mitigation
Michael A. Lively, Danny Perez, Blas P. Uberuaga +2
Stand-off runaway electron termination by injected tungsten particulates offers a plausible option in the toolbox of disruption mitigation. Tungsten is an attractive material choic…