The material for disk was proposed of very high electric charges density: it is cathode of electrolytic cell that is saturated by protons. It can be produced easy by several volts (6 VDC - 10 VDC) potential source.
Such sort rotor can be the source of proton electric current, that can be used not only for power generation but for gravimagnetic field generation also.
I can not check this idea at home and after several
years of consideration it was submitted here for open verification. Ask
me for more detailed description if your laboratory can test a rotating
cathode that is saturated by protons to detect power output and antigravity
effects. The Podkletnov's rotating superconductivity in this conception
is considered as particular case for proton current. To get whole concept
understanding it is useful to read Dr. Nassikas
theory also, where positive electricity (proton) is related to antigravity
and negative electricity (electron) is related to gravity. This theory
allow to find correlation between positive and negative time axis direction
in electromagnetics.