[ibsimu-forum] Initial beam&plasma questions
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From: 申圳 <she...@im...> - 2019-04-26 09:59:24
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Dear all,
I'm using IBSimu (version 1.0.6) to simulate the extraction of multi-charged Ar beams from a 28GHz ECR ion source.
I'm using 3D cylindrical model with ParticleDataBase3D.add_cylindrical_beam_with_energy function to set initial beam conditions.
I've got some simulated beam profiles to compare with the experiment results of a flourescent at the extraction region.
Now I want to change the initial beam distributions of different ions, and I have some questions I can't deal with:
1. I know from the Reference Manual that we can add beam with uniform, gaussian, waterbag,etc. distributions, but is there a chance to introduce distributions from other programs?
2. If 1. is too complicated to do, then how can I add a hollow beam (for low charge state ions)?
3. In space charge averaging: if( i == 0 ) {
scharge_ave = scharge;
} else {
double coef = 0.3;
scharge *= coef;
scharge_ave += scharge;
scharge_ave *= (1.0/(1.0+coef));
}
what does this "coef" means?
Thanks a lot!
Zhen.
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