Active Sheilding

Tom Tucker (Olympia) wrote:

> Ian,
>
> Electrodes do not have to "boil off" any more than the electron gun in
> your TV screen or monitor has to be consumed by normal operation.
> Electrons leave the surface by the electronics of electron guns which
> are well known.

Electron guns are gradually destroyed by normal operation.
That's one of the reasons TV pictures get less sharp with age-
the shape of the gun changes and eventually fails. And that's
only ~10,000 volts. Still, they run at higher temperature
and that makes a difference somewhat.

OK. I did a web search. It's a bit more practical than I
thought. But there are many difficulties.

Check out: http://www.islandone.org/Settlements/MagShield.html
for an article by someone who describes a possible system.
It looks like a combination of passive, magnetic and electric
shielding involving superconducting cables would be required.