Simulation Study of Plasmas Start-Up by Electron Cyclotron Waves in CFQS

This study employs a zero-dimensional model to initiate plasma using electron cyclotron waves in a pure hydrogen plasma environment. Simulations were conducted on the CFQS stellarator device under 54.5 GHz conditions with varying injection powers. The simulation results illustrate the time evolution of plasma electronic temperature, ion temperature, and electron density, with electronic temperature and electron density reaching levels of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$300 \text{eVand} 10^{17} \mathrm{m}^{-3}$</tex>, respectively. By varying the injection power, different characteristic parameters were obtained. However, overall, the three simulated startup processes exhibited similar trends in electronic temperature, ion temperature, and electron density, effectively reflecting the three phases of plasma startup.