Re: Longitudinal Forces in Tesla Coil Metallic Conductors

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Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

This seems to be closely related to the "Z-pinch" effect as practiced 
by Sandia.

http://en.wikipedia.org/wiki/Z-pinch

There are not really any "new" laws of physics there, but rather the 
old ones applied carefully to a specific situation. I imagine they 
known the associated effects very well.

The wire fragments I have were originally in a coil which adds too 
much uncertainty.  I straight wire would tell far more as would super 
high speed photography...  With motion pictures, you could tell if 
there were physical resonances and such tearing the wire.

Cheers,

        Terry



At 03:57 AM 4/25/2006, you wrote:
> I have the pleasure of exploding a few wires and also have a wire 
> collection from my 16kJ cap bank. I did a test fire of a can crush 
> with fine wire (.024inch) in a plastic tube to see if the resulting 
> plasma channel was sufficient to give a crushing 
> current.  Experimental setup is here.
> http://tesladownunder.com/Pulse_Power.htm#Can%20crusher%204
> The net result at 4 kJ was slight denting of the can (perhaps 
> equivalent to 500J worth) with no remaining charge on the cap. So 
> the plasma held until the cap emptied but did not allow a high 
> enough peak current compared to the wire.  I did not control for the 
> reduced physical strength of the plastic tubing compared to the wire 
> however. With the heavy wire, the can is torn in three pieces in that setup.
> I don't really see why new physics is suggested by this. The 
> radially expanding wire with a uniform force will bring out 
> inhomogeneities in the wire and magnify them into physical rupture 
> points. (in a way somewhat analagous to the Big Bang giving 
> microwave background irregulatities, but that would really imply 
> some new physics...).
> Peter
>
> > Hi Bert,
> > I got a batch of your shrunken quarters years ago and I requested 
> > to get the "wire fragments too" ;-)))
> > "Normal" people get a kick out of the coins, but "I" got the wires 
> > too since that is what is "really cool" :o))
> > ........  There are inertial and explosive forces that tend to bend 
> > the wire up too along with impacts to the containment walls...  The 
> > wire fails in weak areas that become dominate fracture areas.  I 
> > suspect plasmas became conductors as the system ripped apart too.........
> > Cheers,
> >         Terry