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28,8Kj ElectroThermal Gun! (Soon handheld)

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: Ragnarok » Fri Feb 20, 2009 6:34 pm

turkeypig666 wrote:so its the same thing in plasma tvs?

That depends on what exactly you mean, but the proper answer would be no. It is the same state of matter, but it is not the same thing.

The first thing to point out is that a plasma is merely a gas (any gas) which holds an electric charge.

Exactly like steam, carbon dioxide, oxygen, nitrogen, etc are all gases, but different gases, the same is true of plasmas.
To put this in perspective using gases instead, if you were to wander in and ask: "Is carbon dioxide the same as steam", the answer would of course be "no".

Plasma TVs use inert gases like neon, argon and xenon which are then energised to a low pressure plasma by relatively little energy (much like a "plasma ball" toy).
This cannon takes solid aluminium, turns it to a gas, then ionises that super hot gas into a very high pressure plasma (the high pressure being by virtue of taking a dense solid and making it into a low density plasma).

So while both are plasmas, they are not the same plasma, as they are made of different substances (and from different starting states it must be added).
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Unread postAuthor: Radiation » Fri Feb 20, 2009 9:25 pm

Quick plasma question, does the resulting "exhaust" condense into aluminum oxides or some other aluminum derivative? Or is the plasma hot enough to actually separate protons, neutrons, and electrons into different elements ala fusion? I know a lot of very weird things happen in this state.
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Unread postAuthor: Ragnarok » Sat Feb 21, 2009 4:00 am

Radiation wrote:Quick plasma question, does the resulting "exhaust" condense into aluminum oxides or some other aluminum derivative?

Yes, it will form aluminium oxides as it cools. The mere fact the aluminium has been atomised would ensure that it was looking to oxidise (because of course, aluminium is pretty reactive - the thing is, it normally forms a protective oxide that normally stops it from oxidising on more than the surface.).

Or is the plasma hot enough to actually separate protons, neutrons, and electrons into different elements ala fusion?

Not even close in this case. If this were hot enough to start fusion, then fusion would be a great deal easier.
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Unread postAuthor: cangying » Sun Dec 27, 2009 9:04 am

Oh God, What is it use for?
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Unread postAuthor: inonickname » Sun Dec 27, 2009 9:14 am

cangying wrote:Oh God, What is it use for?

It would be wise not to post on older topics in the future.

ETG's can be used to achieve very high velocities. Much higher than in any conventional gun. They are also scalable, and muzzle energy will continue to increase as more energy is put into the system. Other projectiles tend to be limited by the speed of sound in the fluid (which is higher when heated). The temperatures and pressures in a gun like this will allow extremely high velocities.
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