# Re: Toroid Design

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Scott -

I do not believe that the voltage can be doubled to 2 million volts by
adding more joules on the 1 meter dia sphere because of the breakout limit
of the 30 Kv per cm of radius. Insulation leakage, etc. would also limit the
voltage.

Increasing the coulombs and joules of energy would result in a spark when
the breakout voltage is reached so the energy would not increase the voltage
but would be lost in the spark. What I cannot find in the literature is what
the efficiences are for these real world VDG conditions.

I show a graph in one of my books for Tesla coil efficiences for different
coil sizes based on empirical data. Apparently this type of information is
not available for VDGs. All of the VDG textbook information is theoretical.

Note that the theoretical work done to charge the VDG terminal is exactly
the same as for the Tesla coil. Efficiencies would difffer. I believe
understanding the work done to charge the real world VDG terminal would help
us to better understand the work done in charging the TC terminal.

John Couture

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At 08:17 PM 1/4/99 -0700, you wrote:
>Original Poster: Scott Stephens <Scott2-at-mediaone-dot-net>
>
>At 10:02 PM 1/3/99 -0700, you wrote:
>
>According to my cypher'n:
>
>1 meter dia sphere capacitance= 4 PI E0 R = 111 pF
>Energy stored -at- 1 million volts= .5 C V^2 = 55.5 Joules
>To double the voltage on the sphere (quadruple the power to 222J)=
>
>The next voltage doubling will require adding (888-222=) 666 Joules }:-)
>
>>> Original Poster: Terry Fritz <twf-at-verinet-dot-com>
>
>--------------------  snip

>Adding constant power will result in a limit being reached. That limit
>itself will be limited far more practicaly by the poor insulation systems
>available. I would just love to have a meter-diameter diamond or sapphire
>for an Inertial Electrostatic-confinement thermo-nuclear fusor.
>
>Forunately for Tesla-philes, the realm of dynamics offers far higher
>potentials and powers with the pulse-power paradigm.
>
>
>

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