A 1.5D fluid—Monte Carlo model of a hydrogen helicon plasma

Abstract Helicon plasma sources operating with hydrogen or deuterium might be attractive for fusion applications due to their higher power efficiency compared inductive radiofrequency sources. In recent years, the resonant antenna ion device (RAID) has been investigating physics of helicon plasmas and possibility employing them produce negative ions heating neutral beam injectors (HNBs). Herein, we present a fluid Monte Carlo (MC) model that describes species transport in typical discharge. This work is motivated by an interest better understanding basic devices and, particular, volume production ions. based on synergy between two separate self-consistent approaches: calculates MC determines rovibrational density profiles H 2 . By introducing electron temperature measured Langmuir probes as constraints, densities ( ${\mathrm{H^+}}$?> + , ${\mathrm{H}_2^+}$?> ${\mathrm{H}_3^+}$?> 3 ${\mathrm{H}^-}$?> − ) are computed 1.5D (dimensional) geometry. The estimate profile represents useful benchmark comparable dedicated diagnostics, such cavity ring-down spectroscopy probe laser photodetachment. Neutral gas particles (atoms molecules) calculated assuming fixed background. gas–plasma decoupling necessary different timescales (microseconds) kinetics (milliseconds).