## NUMERICAL SIMULATION OF ION BEAM EVOLUTION IN MAGNETIZED PLASMA

Galina Dudnikova, M.A. Boronina, E.A. Genrikh, V.A. Vshivkov
Institute of Computational Mathematics and Mathematical Geophysics SB RAS, Novosibirsk, Russian Federation

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AE
Anna Efimova 2020-09-16 15:57
Good morning! What number of particles do you use?
MB
Marina Boronina 2020-09-16 15:57
Hello, Anna.
In these computations we used 4 background particles per cell (total 4800) and every time unit 200 particles were injected (8000 at t=40 and 32000 at t=160).

AE
Anna Efimova 2020-09-16 15:57
Thank you!
VA
V.T. Astrelin 2020-09-16 15:57
Good evening, Marina!
p.3 - In your model ions are injected into plasma. Does the plasma potential change due to addition space charge from ions?

MB
Marina Boronina 2020-09-16 15:57
Good evening, Vitaly Timofeevich.
No, it doesn't, since we don't add only ions, we add electrons as well.

VA
V.T. Astrelin 2020-09-16 15:57
Sorry, no problem - see last equation in p.5
MB
Marina Boronina 2020-09-16 15:57
Yes, you are right.
DS
Dmitry Shmelev 2020-09-21 14:59
Could you explain what the following phrase means: “To solve the Vlasov equations by the PIC method, a transition to Cartesian coordinates and back to cylindrical coordinates is used.”
Or maybe you could give a reference where I could read about it in more detail?

MB
Marina Boronina 2020-09-21 14:59
Dmitry,
the algorithm is proposed by J. Boris in Boris J 1970 Proc. Fourth Conference on Numerical Simulations of Plasmas, Washington D.C., USA, pages 3-67.

In Russian you may find it in Березин Ю.А., Вшивков В.А. Метод частиц в динамике разреженной плазмы. Новосибирск: Наука, 1980, p. 39.

Or, in English in our paper https://iopscience.iop.org/article/10.1088/1742-6596/1336/1/012017/pdf

DS
Dmitry Shmelev 2020-09-21 18:05
Thank you!