Overview

HYBTOK-II is a small conventional tokamak device built to clarify particle transport characteristics in the edge plasma. The electron temperature in the plasma center reaches about 100 eV (about 1 million degrees). Various magnetic field coils are installed for applying perturbation (fluctuation) to the plasma confinement magnetic field from the outside.

• Size: major radius 40 cm, minor radius 12.8 cm, limiter radius 11.0 cm
• Degree of vacuum: ~1×10^-7 Torr
• Plasma current: 10 – 15 kA
• Toroidal magnetic field: 0.5 T
• Line averaged electron density: 2×10¹² – 1×10¹³ cm^-3
• Electron temperature: edge ~20 eV, center ~100 eV
• Toroidal magnetic field, vertical magnetic field, and electric transformer driving plasma current are operated with capacitor banks

Main research topics

• Resonant magnetic perturbation field and plasma flow
• Disruption (plasma collapse phenomenon)