A new checkbox Change primary ion species has been added to the Collision Frequency settings of the Nonresonant Charge Exchange feature in the Charged Particle Tracing interface. The checkbox is selected by default and can be cleared when the ion species as a result of collision have the same properties as the primary particles. In such cases, the primary particles are reused instead of releasing new secondary particles.

A new section, Accumulator Settings, has been added to the Heat Source feature, which improves the functionality of the feature when dealing with elastic collisions of the particles with the walls. The accumulated variable can now be affected by either just the particles that stick or freeze to the walls (the default) or by all particles that interact with the walls.