ONIX

The 3D Particle-In-Cell (PIC) Monte Carlo Collision (MCC) code Orsay negative ion extraction (ONIX) was developed to simulate negative ion extraction in ion sources which are dominated by surface production of negative hydrogen ions, which is the case for caesiated H−/D− sources for fusion. The ONIX code self-consistently simulates particle transport in a hydrogen or deuterium plasma, including dissociation, the effect of collisions, and the influence of an external magnetic filter field and magnetic deflection field.

Relevant publications:

• Particle injection methods in 3D-PIC MCC simulations applied to plasma grid biasing
• Computationally studying H⁻ extraction and beamlet formation: the impact of the plasma model
• Sensitivity of the negative ion beam extraction to initial plasma parameters by 3D particle modeling
• From meniscus formation to accelerated H⁻ beam: coupling of 3D-PIC and ion-optics simulations
• Effects of the magnetic field topology on the co-extracted electron current in a negative ion source for fusion