Re: A solution for the re entrant portion (VDG) (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 12 Feb 2004 15:43:42 -0800
From: Jim Lux <jimlux@xxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: A solution for the re entrant portion (VDG) (fwd)

At 02:05 PM 2/12/2004 -0700, you wrote:
>Original poster: Steven Roys <sroys@xxxxxxxx>
>
>
>
>---------- Forwarded message ----------
>Date: Thu, 12 Feb 2004 09:25:35 -0800
>From: Ed Phillips <evp@xxxxxxxxxxx>
>To: High Voltage list <hvlist@xxxxxxxxxx>
>Subject: Re: A solution for the re entrant portion (VDG) (fwd)
>
>I agree that is a neat idea (if one has the suitable tank with a hole
>in it)!  Question on the water dropper.  Have you built it yet and if so
>how does it perform?  I've always thought it would be fun to build one
>but haven't gotten any further than to mount some soft drink cans with
>ends cut out on PVC pie using hot melt glue.  Are the results worth the
>bother?  I found a bunch of stuff in Bill Beatty's archives, but not too
>much on results obtained.


A colleague put together a water dropper here at the lab and it works quite
nicely.  A distinct "zap" and visible spark every couple seconds. judging
from the separation of the gap, about 5-10 kV.  The nifty thing is that as
the charge builds up, the droplets start spraying around.  Nylon wire ties
and PVC pipe were the construction method.

I've always wanted to build a "big" water dropper (trash can/shower head
sized)... You'd need a recirculating pump, but those are easy to come by.

I think Antonio has a scanned article from a Frenchman about 100 years ago
who built a very nice "shower head" type water dropper, with 4 heads, four
charging rings and 4 collectors.

One could make a very pretty system with nice polished brass and copper
tubing...