Publications (7)
Eulerian variational formulations and momentum conservation laws for kinetic plasma systems
H. Sugama, M. Nunami, S. Satake +1
The Eulerian variational principle for the Vlasov-Poisson-Ampère system of equations in a general coordinate system is presented. The invariance of the action integral under an ar…
Benchmark of the Local Drift-kinetic Models for Neoclassical Transport Simulation in Helical Plasmas
B. Huang, S. Satake, R. Kanno +2
The benchmarks of the neoclassical transport codes based on the several local drift-kinetic models are reported here. Here, the drift-kinetic models are ZOW, ZMD, DKES-like, and gl…
The Eulerian variational formulation of the gyrokinetic system in general spatial coordinates
H. Sugama, S. Matsuoka, M. Nunami +1
The Eulerian variational formulation of the gyrokinetic system with electrostatic turbulence is presented in general spatial coordinates by extending our previous work [H. Sugama,…
Moderation of neoclassical impurity accumulation in high temperature plasmas of helical devices
J. L. Velasco, I. Calvo, S. Satake +16
Achieving impurity and helium ash control is a crucial issue in the path towards fusion-grade magnetic confinement devices, and this is particularly the case of helical reactors, w…
Radially local approximation of the drift kinetic equation
H. Sugama, S. Matsuoka, S. Satake +1
A novel radially local approximation of the drift kinetic equation is presented. The new drift kinetic equation that includes both and tangential magnetic…
Large tangential electric fields in plasmas close to temperature screening
J. L. Velasco, I. Calvo, J. M. GarcÃa-Regaña +4
Low-collisionality stellarator plasmas usually display a large negative radial electric field that has been expected to cause accumulation of impurities due to their high charge nu…
Particle transport after pellet injection in the TJ-II stellarator
J. L. Velasco, K. J. McCarthy, N. Panadero +17
We study radial particle transport in stellarator plasmas using cryogenic pellet injection. By means of perturbative experiments, we estimate the experimental particle flux and com…