No no, please don’t do this without eye protection. I did some grinding without eye protection, didn’t hurt or anything, but day later doctor had to drill metal particles out from my eye balls.
0/10, would not recommend
and they said that I cannot get MRI ever again, because some small particles might be still inside and magnet can pull them out. Fun stuff.
There is no energy amount mentioned, only power. This indicates that it is really low, like able to provide the 30MW output only some minutes.
For frequency correction this can work, because you can quickly change direction, but is it too complex just for that.