Fusion Message Board

In this space, visitors are invited to post any comments, questions, or skeptical observations about Philo T. Farnsworth's contributions to the field of Nuclear Fusion research.

Subject: Re: thermionic cathode
Date: Nov 08, 8:29 am
Poster: Richard Hull

On Nov 08, 8:29 am, Richard Hull wrote:

>ok. next idea..
>why not insulate the inner electrode.
>ie. cvd coat the inner electrode with silicon dioxide or aluminum oxide.
>the inner electrode will capacitively couple and the insulating layer will lower the electrodes emmission.

No one has tried that here yet. Someone should. Remember the same number of electrons will hit the inner grid as before and the same heat will be there. Some oxides work better as emitters than the bare metals. Some investigation would be needed.

Richard Hull