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posted by Mehmet Balta at Jun 13, 2014 5:22 PM
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Hi,

I am trying to verify SPT100 thruster plumes. However I have troubles with the convergence of current density values.

GEO worst case electron number density is 3e6 ! m3 !. However the electron number density for the thruster plume is significantly larger than that (3e15 ! m3 !).

As you know the formula to set the individual time step is:

0.2*2*pi/(plasma freq)

When I calculate this for the electron density of the plume, the time step seems too small (around 4.2e-10s) which makes it nearly impossible to compute.

Do you have an idea what to do in this kind of condition? How should I set the time step ?

Thank you,

Best Regards, M.Y.Balta