Re: Van de Graaff generator safety question (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 13 Jan 2004 21:56:22 -0600
From: Dr. Resonance <resonance@xxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Van de Graaff generator safety question (fwd)


Yes, we built one about 12 years ago.  Current increase, as compared to a
belt, is approx 1,200%.

This is the principal reason for the Pelletron.  This and smooth voltage
regulation --- the belts produce poor voltage regulation which makes
precision physics nearly impossible.  Precise potentials and currents are
required to do good accelerator physics.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
----- Original Message -----
From: "High Voltage list" <hvlist@xxxxxxxxxx>
To: <hvlist@xxxxxxxxxx>
Sent: Tuesday, January 13, 2004 9:23 PM
Subject: Re: Van de Graaff generator safety question (fwd)


> Original poster: Steven Roys <sroys@xxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Mon, 12 Jan 2004 14:16:35 -0500
> From: Charles Brush <cfbrush@xxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Van de Graaff generator safety question (fwd)
>
> >
> >>---------- Forwarded message ----------
> >>Date: Thu, 08 Jan 2004 13:42:18 -0800
> >>From: John Pepper <jspepper@xxxxxxx>
> >>To: High Voltage list <hvlist@xxxxxxxxxx>
> >>Subject: Re: Van de Graaff generator safety question (fwd)
> >>
> >>Greetings All,
> >>
> >>I have recently completed a functioning pumped Van de Graff using a 20"
> >>waterscapes gazing ball.   Using the small tooling hole as a guide I
laid
> >>out a
> >>circle for the belt/support hole.   A small dremel with a cut off disk
and
> >>a bit
> >>of patients were used to cut the hole with satisfactory results.  The
> >>hardest part
> >>was getting the edge rolled in on the hole.  I managed to get about a
3/4"
> >>radius
> >>at best.  I tried making special tools and using heat but that stainless
> >  >is tough.
>
>
>
> Sounds like a nice machine!  How does it perform?  Are there any
> photos of it posted anywhere?  This thread has gotten me really
> interested in building one myself.   The last Van de Graaff I built
> was in grade school about  26 years ago.  I had little mechanical
> skill and the thing didn't work at all.  These days I think I could
> do a bit better, and I have a nice 50kV DC supply that would
> probably be perfect for charging the belt.
>
> Has anyone here ever tried to build a Van de Graaff with a belt like
> those used by pelletrons?  The belt would not be easy to build, but I
> wonder if there is any sort of a device that uses a chain that could
> be modified with insulated links.  Here's some info on pelletrons for
> anyone interested:
>
> http://www.pelletron.com/charging.htm
>
> Zap!
>
> Charles Brush
>
>
>
>