Re: theory(?) for long sparks

From: 	Antonio Carlos M. de Queiroz[SMTP:acmq-at-compuland-dot-com.br]
Sent: 	Friday, December 05, 1997 10:36 PM
To: 	Tesla List
Subject: 	Re: theory(?) for long sparks


> Tried a 6 ft long plastic tube once with a small coil.  The streamers
> actually melted pathways into the plastic due to their higher capacitive
> energy.  It does work well with glass tubes though.  We have only tube 10
> feet long we can hook up to coils and then pump a very slight below
> atmospheric vacuum (around 6000 microns works nice) and the streamers are
> very long and quite spectacular.  We use a 6 inch dia tube and have used
> some up to 10 inch dia for the experiments.

Certainly sparks al low pressure are longer than at normal pressure, but
the tube that I mentioned was just a support to hold a small insulated metal
ball close to one main high-voltage terminal.

Antonio Carlos M. de Queiroz