Message by EW:
Is it possible to modify the electron/ion mass ratio for the full pic simulation?
Message by Sébastien Hess:
Hello.
With SPIS up to 5.2 it is not. But for pure electrostatic simulations you can play on the speciesDt: if you put electronDt=1E-6 and ionDt=1E-5 with plasmaDt=1E-5 , it will act as if you reduced the ion mass by 100
If you are using Spis DUST 5.2.2 you can use chemical formulas to define the species, which as a side effect allows to play with ion masses:
exemple of working formula (from the javadoc):
- Ar+ (Argon ion)
- CH4 (methane)
- OH- (hydroxyle ion)
- (CH3)2+ (ethane ion)
- CH3(2+)(double ionized methyl ion)
- HDO (heavy water)
- ! 18O !(2+) oxygen 18 ion (doubly ionized)
- D deuterium
- T tritium
- elements above 110 must be expressed as ! yyy.yyUxx ! with yyy.yy the mass (may be decimal or not), and xx the end of the symbol
Message by Sébastien Hess:
There is a problem with symbols in this forum!Formula between the ! signs should be between brackets.
Message by Felicien Filleul:
Hi Sebastian,
I’m very puzzled by what you wrote about the speciesDt, how does it works in SPIS for a time step difference of one order of magnitude can virtually affect the mass of the ion ?
I have to say that I’m very perturbed by the functions of the populationDt and the plasmaDt.
Thank you,
Felicien