Message by **Mehmet Balta**:

Hello,

For finding the electrondt and iondt or populationdt’s we use the formula: 0.2xpix2/w. How would you set the sourcedt for source ions(Xe, Xe++, etc.) when you analyze the thruster plume ?

Thank you,

Best Regards,

Mehmet

Message by **Jean-Charles Mateo-Velez**:

Hi,

sourceDt is calculated to have = L / velocity, where L is a typical length, i.e the spacecraft. If the density is very large and space charge effect important, you need to solve at dt = 0.2xpix2/w where w is nw linked to source density.

Jean-Charles

Message by **Mehmet Balta**:

Thank you,

However, as far as I found out, it is a bit complicated and I had to write a matlab code to tune parameters such as sourcedt, sourcespeedup, plasmadt, densification and number of triangles on the ejecting surface tuned wrt plume physics.

Regards,

Mehmet