Fig. 1. Structural diagram of NCST device main machine (color online) (a) External structure, (b) Internal structure

Fig. 2. NCST device model and grid (a) COMSOL geometric model diagram, (b) COMSOL grid profile

Fig. 3. Magnetic field distribution contour in the y-z plane (color online)

Fig. 4. Power deposition distribution at different power levels (y-z profile) (color online)(a) 0.5 kW, (b) 0.75 kW, (c) 1 kW

Fig. 5. Electron density distribution at different powers (y-z profile) (color online)(a) 0.5 kW, (b) 0.75 kW, (c) 1 kW

Fig. 6. Electron temperature distribution at different powers (y-z profile) (color online)(a) 0.5 kW, (b) 0.75 kW, (c) 1 kW

Fig. 7. Evolution of simulation results of power deposition (a), electron density (b), electron temperature (c) over time under different input power