Realizing a true Bessel beam would thus require infinite power.
A true Bessel beam is created by interfering (in 2D) two plane waves, see https://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Be.... You can see in the image that the "Bessel beam" area is bounded, it is the conical shape where the beams overlap.
Assuming this hasn't changed since the preview started:
> The cool down period for scale-down is 15 minutes since the last scaling operation. The cool down period for scale-up is 5 minutes since the last scaling operation.
