That's awesome, I was just getting started in doing something similar but starting with even simpler geometries. Fantastic work.

I like that! Your own personal space is guaranteed

Cavitation is a phenomenon that occurs in masses of liquids (property of mass/matter). Liquids turn into gas at certain combinations of temperature and pressure, so at a certain temperature if pressure drops (e.g. due to fluid motion), vapor will form. Radiation (generically) is related to energy (it does propagate in the vacuum), thus it cannot "cavitate".

Me too and it's annoying

There's hope