RF energy between charged plates?

[hobbs125]

I have two parallel conductive plates.
The plates are charged to a high voltage by a HVDC power supply.

When the plates are charged rf energy is present between them.

What could be causing this?
I am thinking field emission at the cathode is causing it ,but not really understanding physics is that plausible?

What do you guys think? What could be the cause of rf occurring between two plates charged to a high dc voltage?

 

[dotmatrix]

Eddy Currents, Whatcha trying to do? I'm not a physicist btw.

 

[hobbs125]

Just playing around with high voltage and noticed rf on my oscope while applying a high voltage to parallel plates... wondering what is causing it?

I know it's not just noise from a nearby source and know that it's coming from between the plates. ... also I noticed it's highest amplitude frequency is related to the distance between the plates

 

[dotmatrix]

If you are applying a high voltage to a conductive material, you can induce a voltage across another if it's close, same reason why metal stuff next to a magnet becomes magnetized

 

[anorlunda]

It is possible that you are detecting corona discharge.

http://en.wikipedia.org/wiki/Corona_discharge