[Archive] Charging Potential Problems

Message by Fang Yang:
When I use default settings :Ni,e=1e6 cc
Ti,e=1 eV as GEO environments, the simulated potential often at -0.x V
when I use these settings: Ni,e=1e11 cc
Ti,e=0.1 eV

and Non-Linear Poisson Method
as LEO environment, the simulated potential often beyond -100 V
It is not very reasonable and must be a bad result.
And the background plasma potential is not balance or at zero at eachcases. even if I made a larger compute volumn, still dont work:(

I dont know which part or step was wrong. and come here tofind some help.
samuel yang