i try to learn CST particle studio and there are some problems with it:
my project has particle source with DC emmision method, traveling tube and current monitor; i expect to see constant current in the monitor (and there is for time 0.5 - 2), but later, for some reason, particles start to group and current starts to oscillate (time 2-5).
Maybe there is some unstability in PIC solver, but i don't understand how to fix it. Any ideas why particles group?
constant current **broken link removed**
current starts oscillate **broken link removed**
current vs time **broken link removed**