Re: Megavolt at $90 (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 14 Mar 2004 19:32:01 -0300
From: Antonio Carlos M. de Queiroz <acmq@xxxxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Megavolt at $90 (fwd)

High Voltage list wrote:

> A few months later, Van de Graaff generated over
> 1 000 000 V between two 60-centimeter-diameter spheres on Pyrex columns 180
> cm high. This version was published Oct. 28, 1931, in a three-page "Disclosure
> of invention," signed by Van de Graaff and two witnesses. The apparatus cost
> $90.

The first paper about the VDG generator was a quick note at the Physical
Review, vol 38, p. 1919, 1931.
http://www.coe.ufrj.br/~acmq/vdg1931.gif
The double machine:
http://www.mos.org/sln/toe/historical/6ftvdg.jpeg

Antonio Carlos M. de Queiroz