COMSOL: Elastic Collision and Resonant Charge Exchange Problem.
 

Dear Expert:

I have been trying to create a simple model for studying Initial Electrostatic Confinement with COMSOL Multiphysics, but I face some errors that occur in my simulation when I tried to add elastic and resonant charge exchange in the particle tracing module. I have no idea that it is from an analytic function or my time-dependent setting.

More detail about errors and .mph file in my google drive. Thank you for your kindness.

https://drive.google.com/drive/folde...si?usp=sharing