The neutron source on the left (excuse the sorry excuse of a neutron cannon) shoots relatively straight neutrons into the water, which are then slowed down.
Everything goes as expected till then, but then the neutrons just start to curve in random directions.
Can someone explain why?
I think it's because of their diffusion property, annoying, you can't make neutrons not move :P
But you can make them not have that curve if you type in the console " tpt.el.neut.diffusion=0 " ,
and to make it go back to normal either restart TPT or type in the console " tpt.el.neut.diffusion=0.01 ".
Thank you, this is quite useful!