Thank you so much for your answer.
I am studying this probe methode.
I want to try simulation.
I tried using plasmapy but with your data,it is not accurate.
And i am trying the simulation of three geometries.
It would be awesome,if you are willing to share the simulation codes of this post.
It looks perfect through my eyes,so i would ask.
Thank you.

My adress is gregshong@naver.com