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Re: [Amps] Risks from continuous discharge of high voltage ??

To: "" <>, amps <>
Subject: Re: [Amps] Risks from continuous discharge of high voltage ??
From: "Fuqua, Bill L" <>
Date: Sun, 3 Jul 2011 14:21:02 -0400
List-post: <">>
  X-rays are produced when high energy electrons or protons strike certain 
Actually any elements will produce x-rays if the electrons or protons have 
enough energy.
X-ray tubes use metalic anodes that produce the X-rays at farly at much slower 
electrons than
many of the other elements. Protons are usually used for elemental analysis 
Google PIXIE.
  The point is there is a reason for the vacuum in an X-ray tube. That is, the 
electrons must not
strike any gas molecules before they get to the anode. Otherwise they loose 
energy and don't 
produce the X-rays.  An arc is produced becasue the mean-free path distance is 
just long enough
for the electron to be accelerated to enough to strike a molecule and either 
doubly ionize it or produce an extra electron  and you have
a sort of chain reaction (avalanche). One electron produces two and two produce 
four etc.
  The energy required to do this is much less than that required to produce 
  Each time an electron strikes a molecule or atom the acceleration process 
starts over again. 
Bill wa4lav

From: [] On Behalf Of 
Ron Youvan []
Sent: Sunday, July 03, 2011 8:58 AM
To: amps
Subject: Re: [Amps] Risks from continuous discharge of high voltage ??

Dr. David Kirkby wrote:

> There's an ebay auction for a 100 kV transformer from an x-ray set.


> I mentioned to the seller he should warn people of possible production of
> x-rays. He does not think this possible and I must admit I'm not sure if its
> possible without a vacuum. But I've also suggested that it could produce UV 
> and
> ozone.

   The production of X-rays requires something that does not exist in a 
transformer or the
transformers would be lined with lead sheeting.  Which is: "a high velocity 
stream of electrons that
changes speed abruptly."

> It's clearly being sold as a fun experiment:

> "Dangerous but great fun and ideal for lots of interesting experiments."

> But at 100 kV, I'm wondering what dangers there are apart from the obvious one
> of electrocution.

   Like setting the house on fire.

> Somehow I would not want to be playing around too much with 100 kV and drawing
> big arcs, but perhaps I'm over reacting.

   I think a Van de Graaff generator would be at least 10,000 times safer.

> I've suggested he ads a note that there may be other dangers other than
> electrocution.
    Ron  KA4INM - Madam, there's no such thing as a tough child -- if you 
parboil them
                  first for seven hours, they always come out tender.  -- W. C. 
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