On 9/18/19 07:02, Vladimir Lenok wrote:
I am trying to use MEEP (python) for performing Cherenkov simulations
and I faced with two issues:
1. When I make a simulation of a horizontally moving charge then
everything looks fine. But when I incline the trajectory I can see some
stable fields on the way of the charge.
The small field irregularities you are observing may be due to
high-frequency numerical artifacts of the discretization. For reference,
see Fig. 5 of the Meep paper
(http://ab-initio.mit.edu/~oskooi/papers/Oskooi10.pdf) and the related
discussion in Section 3 "Interpolation and the illusion of continuity".
One way to verify this would be to either increase the resolution or
decrease the Courant factor and see whether these artifacts become less
noticeable.
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