Re: mist maker / electrostatic motor

[Wes Davis <wlrdavis@EARTHLINK.NET>]

    The terminals of Van de Graaff accelerators are charged by
a HV power supply that is connected to the "spray" screen at
the bottom of the charging belt.  You're right, it's not hard to
change the output polarity of the power supply.


-----Original Message-----
From: Rick Tarara <rbtarara@SPRYNET.COM>
To: PHYS-L@lists.nau.edu <PHYS-L@lists.nau.edu>
Date: Wednesday, May 17, 2000 6:33 PM
Subject: Re: mist maker / electrostatic motor


> Both the 3 MeV standard Van de Graaff and the 8 MeV tandem Van de Graaff at
> Notre Dame could be charged to either polarity (although the tandem acted
> only as a single ended machine when charged negatively).  There was an
> active 'electron' group in the Nuclear Structure Lab that used this
feature.
> I never knew all the technical details on how the machines charged
> negatively, but it wasn't all that difficult.
>
> Rick