DriftLineRKF will fail to operate when encountering a zero electric field region

[pedro]

Greetings,

I’m having some issues with the simulation of DriftLineRKF in the electric field generated by COMSOL.
When I normally add positive and negative high voltages, the operation is normal, and its electric potential field is as follows:

However, when I apply high voltages at two positions simultaneously, there are some positions in the electric field where the electric field is zero. When the program runs to the middle, the program does not continue to run and no error is reported either. Its electric potential field is as follows:

May I ask if this situation occurs with DriftLineRKF?What can I do to solve this problem?
@hschindl

[Danilo]

Hello,

Thanks for the post. I think the right person to ping is indeed @hschindl .

Best,
D

[hschindl]

Hi,
indeed, if the electric field (and hence the drift velocity) at a point is zero, DriftLineRKF will stop the drift line calculation. If you want to transport electrons in a region with zero (or low) electric field, you could use AvalancheMC or AvalancheMicroscopic which do include diffusion.