Active Sheilding

Ian,

Good reference below! I recommend it for everyone interested in shielding.

Tom
From: Ian Woollard
To: spacesettlers@egroups.com
Sent: Saturday, December 23, 2000 7:06 PM
Subject: Re: [spacesettlers] Re: 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.

Tom - Yes, but metal that is ablated can be easily allowed for. Wear should be minor.

What we need now is funding for an advanced engineering analysis for both active and passive shielding, and then some experiments in space on the ISS.

Cheers,

Tom

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.

> Tom

Good reference below! I recommend it for everyone interested in shielding.

Tom
From:
Ian Woollard
To:
spacesettlers@egroups.com
Sent:
Saturday, December 23, 2000 7:06 PM
Subject:
Re: [spacesettlers] Re: 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.
Tom - Yes, but metal that is ablated can be easily allowed for. Wear should be minor.

What we need now is funding for an advanced engineering analysis for both active and passive shielding, and then some experiments in space on the ISS.

Cheers,

Tom
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.