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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hi all.
Just occurs to me that the latest 3-D "plasma" research uses water as a display medium. It seems that the laser breakdown threshold for water is far lower than for air, and to make a bubble which then flashes as it collapses (laser induced sonoluminescence?!) is a lot easier. I think they also used ultrasound to initiate the breakdown and shim the ultrasound fields so it scans the voxel space several times a second generating a flat sheet of discharges.
Recall the article about short lived fireballs from water when hit with a massive capacitor discharge via a shaped electrode?
Wonder if you could combine the two techniques to produce a laser plasma fireball from water, then apply enough RF energy via a tuned field coil array (sort of like microwave plasma) and shim the fields to keep it in one place?
If salt water is used then the fireball would appear reddish-orange and could remain stable for tens of seconds in air. As long as energy in > energy out then it should hold itself together with the aid of pressure from the atmosphere and the strong poloidal magnetic fields present within the fireball itself.
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Isn't it sort of like that electrolysis by microwave radiation thing I posted some time ago? It split water into hydrogen and oxygen, and the heat created by the microwaves caused it to ignite...
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
It isn't, the fireball is acting as a breakdown region in much the same way as in the microwave case. What is interesting is that it can be initiated in open air without a highly dangerous microwave field.. Maybe Tesla's "pet fireball" was this, or a thin glass inert gas filled sphere that floated due to being fairly hot?
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Tame fireballs via laser air/water breakdown?
