Message by Jaime Perez Luna:
Hello everyone !
I a new to SPIS and I am trying to do simple simulations to get used to it.I am trying to simulate an emissive sphere in a plasma with both electron and ion populations described by PIC. The problem is I want the sphere to be an electron source and it doesn’t seem to work: no particles are created :
“Monitoring numerics of simulation at time 9.924812E-6
PICVolDistrib ions1: 362753 particles, last numerical time step used = 3.7593985E-8s (max allowed = 8.797073E-6s), numerical speed up = 1.0
PICVolDistrib elec1: 294887 particles, last numerical time step used = 3.7593985E-8s (max allowed = 2.0604317E-7s), numerical speed up = 1.0
PICVolDistrib source1: 0 particles, last numerical time step used = 3.7593985E-8s (max allowed = 3.7618165E-8s), numerical speed up = 1.0
Last local volume potential change: 0.09631772V maximum change, and 0.011914572V average change (last plasma time step = 3.7593985E-8s)”
What is strange is that everything seems to work when I change the partcile type of my source to Xe+ or another ion species.Does anyone have a clue ?
Message by Nuno Loureiro:
Hi,
I also found some problems using sources, but have you tried changing the current density, in the plasma editor, to a negative value?
I tried to simulate the same thing you said with the project of the sphere that comes with SPIS and I indeed get 0 population when I don’t change the current density to a negative value. However, after the change I get a population for the source1 and the simulation runs well.
What version of SPIS and OS do you use?
Hope this helps,
Nuno
Message by Jaime Perez Luna:
Hi, well thanks a lot !
Everything seems to work properly using a negative current density for electrons.Thansk again,
Jaime