Particle: Beam Noise issue

I was wondering if anyone new how to fix this (first attached picture).

I have a Beam particle that is a simple line, that hardly bounces up and down. It looks like a concentrated laser, sweet. BUT, the edge that instantiates the beam flickers too much so you can see a triangle of distortion. This distortion is just a little to visible and kinda ruins the effect, even from afar.

any ideas on what values I should tweak to get the instantiation point to calm down

The second picture is the end of the beam. notice that it is calmer than it’s start point.