Re: Magnetization of Toroid

To: tesla-at-pupman-dot-com
Subject: Re: Magnetization of Toroid
From: Richard Hull <hullr-at-whitlock-dot-com>
Date: Mon, 05 Aug 1996 10:21:08 -0700
Tesla List wrote:
> 
> >From rwall-at-ix-dot-netcom-dot-comThu Aug  1 22:59:39 1996
> Date: Thu, 1 Aug 1996 21:02:15 -0700
> From: Richard Wayne Wall <rwall-at-ix-dot-netcom-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Magnetization of Toroid
> 
> 8/1/96
> 
> Tonight I evaluated a small TC with a simple compass to try and
> determine if there is a magnetic component associated with a DC
> electromagnetic field.  The secondary arcs were about 24 inches from a
> metal toroid.  The toroid is made from 3" galvanized steel stove pipe
> elbows covered with bright aluminum tape.  The toroid is 10-1/2" X 3"
> with a flat steel inner plate.  There are twelve flat "fascets" on the
> outer diameter of the toroid.
> 
> Firing the coil in the vertical position, I approached the coil with
> the compass on a long wood insulator.  There were no compass strikes.
> The compass did not deviate from magnetic north over or around the
> toroid.  Held a few inches from the coil itself there was still no
> compass deviation.  I did not fire horizontally.
> 
> After shutting the coil down, again the coil was surveyed and there was
> to no compass deviation next to the coil itself.  However, surveying
> the toroid revealed strong deviation with the north seeking compass arm
> swinging to ENE.  Removing the toriod from the TC revealed a magnetic
> field appearantly induced in the metal toroid.  Placing the compass on
> the flat inner plate of the toriod oriented the compass to specific
> areas of the toroid.  This orientation held even while rotating the
> toroid 360 degrees.
> 
> Replacing the toroid in a different position and refiring the TC
> changes the magnetic orientation on the induced magnetic fields of the
> toroid.
> 
> Please reconfirm this lowtech experiment.
> 
> Will high frequency RF discharges magnetize the metalic toroid in a
> particular orientation?  What's the likelyhood that DC discharges cause
> magnetization in a particular orientation?
> 
> RWW
> RWW,

I have printd out your info here.  I will perform the experiment soon to 
check your data.

One important point... What is your toroid made from?  If it is aluminum, 
it can't be magneitized!  If steel or even stainless, some form of 
magnetization is possible.  The AC should never magnetize anything.  Too 
the contrary, this is a perfect demagnetizer current.  DC can magnetize 
ferromagnetic material very well.  The DC currents from the "charging ion 
clouds" should be too small to detect with a simple compass anyway. 

 A SQUID (super conducting quantum interference device) has been used to 
measure micro guass fields in charging capacitor dielectrics and no 
magnetic field has been detected. (D.F. Bartlett 1990 American Journal of 
Physics)  There goes the B component of Maxwell's displacement current!!

Nonetheless, your experiment is interesting and a real effort to 
determine the truths of what is going on.

Richard Hull,TCBOR