even firing fast, the stream does bend.
the "bending" itself is an illusion: if the emitter moves, the next particle will be offset from the previous, and it creates an arched beam.
I was thinking on using a flow control and a line, but it's the same thing: I can't direct the line by it's vertices.
the closest thing to a phaser that I could get was similar to the Bugship polaron beam: straight, forward, short bursts and thin, but that was with a line and helpers.
I still can't make a Galaxy-style, or Defiant-style phaser: stuck in a point and following a target.