Re: sphere within a sphere

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br> 

Tesla list wrote:
 >
 > Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>
 >
 > The sphere within a sphere concept has considerable merit.
 >
 > In the 1940's Van de Graaff and Trump successfully used this concept to of
 > multi-shells within shells to allow Van de Graaff generators achieve higher
 > potentials than a single sphere could.  There are several articles published
 > in the 1940's --- see Physical Review for these articles (Trump, Van de
 > Graaff, Atta, et al).

The idea in this case was field equalization. The same function of the
equipotential rings along the column. The several shells were not
floating, but biased at voltages varying from zero at the outer shell to
the maximum voltage at the inner shell.
http://www.coe.ufrj.br/~acmq/herb1940.gif
May work in a Tesla coil too, by connecting the outer shells along the
secondary coil (doing something, or nothing, about the "shorted turns"
that they introduce), but the idea was to -not- produce sparks.

Antonio Carlos M. de Queiroz