Speaker
Description
High-density plasma discharges in hydrogen operating at low pressures are of considerable interest for negative ion production used in many applications. Their weak collisionality requires a kinetic, nonlocal description, and a popular approach is to model such discharges numerically using the particle-in-cell (PIC) method combined with Monte Carlo collisions (MCC). However, the most commonly used explicit variant of this method is highly inefficient because it must resolve both the Debye length and the plasma period. In this context, the energy-conserving implicit PIC/MCC scheme appears to be an attractive alternative, as it can model the plasmas of interest using their actual parameters without resorting to artificial scaling techniques.
This talk presents simulations of several types of high-density plasma discharges performed using electromagnetic or Darwin/electrostatic energy-conserving PIC/MCC codes in hydrogen, and discusses the observed negative ion production.
| Email address | Denis.Eremin@rub.de |
|---|---|
| Visitor's Visa | no |
| Classification | Numerical simulations of sources, beams, space-charge, ion-optics |