60 citations · 160 across the 9 of their papers we have counts for
9 papers
Wall Ion Loss Reduction by Acceleration Zone Shifting in Anode-Layer Hall Thruster
Rei Kawashima, Yushi Hamada, Shu Kawabata +2
In this study, wall ion loss and erosion rate are evaluated in the RAIJIN thruster. The novelty of this work is the detailed analysis of measured guard-ring (metallic channel wall)…
Two-dimensional hybrid model of gradient drift instability and enhanced electron transport in a Hall thruster
Rei Kawashima, Kimiya Komurasaki
An axial-azimuthal two-dimensional Hall thruster discharge model was developed for analyzing gradient drift instability (GDI) and cross-field electron transport enhancement induced…
Optical emission spectroscopy of non-equilibrium microwave plasma torch sustained by focused radiation of gyrotron at 24 GHz
Sergey Sintsov, Kuniyoshi Tabata, Dmitry Mansfeld +2
The electron and gas temperature of non-equilibrium argon plasma torch sustained by a focused 24 GHz microwave beam in the external atmosphere of air was measured by optical emissi…
First order hyperbolic approach for Anisotropic Diffusion equation
Amareshwara Sainadh Chamarthi, Hiroaki Nishikawa, Kimiya Komurasaki
In this paper, we present a high order finite difference solver for anisotropic diffusion problems based on the first-order hyperbolic system method. In particular, we demonstrate…
High-order upwind and non-oscillatory approach for steady state diffusion, advection-diffusion and application to magnetized electrons
Amareshwara Sainadh Chamarthi, Kimiya Komurasaki, Rei Kawashima
Steady state simulations} of magnetized electron fluid equations with strong anisotropic diffusion based on the first-order hyperbolic approach is carried out using cell-centered h…
Two-dimensional Modeling of the Hall Thruster Discharge with Non-uniform Propellant Supply in Azimuth
Rei Kawashima, Junhwi Bak, Kimiya Komurasaki +1
A two-dimensional simulation is conducted to investigate the effect of cross-field electron transport enhancement in the Hall thruster discharge caused by the nonuniform propellant…
A flux-splitting method for hyperbolic-equation system of magnetized electron fluids in quasi-neutral plasmas
R. Kawashima, K. Komurasaki, T. Schoenherr
A flux-splitting method is proposed for the hyperbolic-equation system (HES) of magnetized electron fluids in quasi-neutral plasmas. The numerical fluxes are split into four catego…
A hyperbolic-equation system approach for magnetized electron fluids in quasi-neutral plasmas
R. Kawashima, K. Komurasaki, T. Schoenherr
A new approach using a hyperbolic-equation system (HES) is proposed to solve for the electron fluids in quasi-neutral plasmas. The HES approach avoids treatments of cross-diffusion…
Numerical analysis of azimuthal rotating spokes in a crossed-field discharge plasma
R. Kawashima, K. Hara, K. Komurasaki
Low-frequency rotating spokes are obtained in a cross-field discharge plasma using two-dimensional numerical simulations. A particle-fluid hybrid model is used to model the plasma…