btmeehan at gmail.com
Sun Nov 18 12:21:41 MST 2007
Another semi-offtopic "cool demo" idea. I have heard that argon gas makes
the sparks larger/longer? Someone once suggested that I get one of those
smoke ring launchers (http://www.zerotoys.com/newsite/products.htm) and
shoot argon gas rings at the topload for a lightning donut effect.
On Nov 18, 2007 8:35 AM, Ed Phillips <evp at pacbell.net> wrote:
> Striations in the discharge between two electrodes can be seen
> easily at some gas pressures and are a rough measure of the pressure.
> I've observed them often enough and think they are most visible when the
> pressure is still over a mm. Set up a discharge tube and a vacuum pump
> and observe them as the pressure goes down. Put a pinch clamp on the
> tube to the pump and you can hold the pressure and observe at your
> Every guy playing with TC's and HV in general should also have a
> vacuum pump available as there are lots of interesting visual
> experiments to be run. Even a converted rotary AC or refrigerator pump
> is plenty good enough to get down into this pressure range.
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