How can i scale the lenght of a laser beam (particle effect) ?

I tried everything but this laser beam just don’t scale it’s size on the Y and Z axis. Only the X axis works but i want to scale how tall it is on the Z axis…

and lastly only the x axis works

Any idea how i can scale this to be smaller somehow and not so long ?

Edit: Do someone know how to scale it to be smaller in lenght ?

What is this thing ?