[ibsimu-forum] Too small step size exception

[Ornella L. <orn...@ln...>]

Dear all,

I’m working with IBSimu from some weeks.

I’m running a simulation on a positive Ion Source.

I have a Mode_CYL geometry where I add a pexp_plasma at -3mm from the 
plasma electrode.

The simulation converges and complete all iterations, but on the console 
I see bad value concerningtotal beam current.

I add a beam of 880 micro Amp and during the iterations I get a total 
current on boundary 2 greater than the initial one.

At Major cycle 0 I can read "Total beam current 0.00679A"

I report the total current (@boundary 2) trend vs. # interaction:
0) 0.000946 A
1) 0.000974 A
2) 0.000969A
3) 0.000975 A
4) 0.001176 A
5) 0.000961A
6) 0.001096 A
7) 0.00103 A
8) 0.001031 A
9) 0.001027 A
10)0.001035A

What am I doing wrong?

I attached my source code to allow you to check if I made any mistakes.

Thanks in advance.

Regards.

Ornella

-- 

Ornella Leonardi, Ph.D

Istituto Nazionale di Fisica Nucleare
Laboratori Nazionali del Sud
Via S. Sofia 62
95123 Catania (Italy)
office:   +39 095 542642
e-mail:orn...@ln...