From: "John" <kc76@esthisis.demon.co.uk>
Newsgroups: sci.physics.plasma
Subject: Re: Plasma globe
Date: Fri, 30 Jan 1998 19:57:15 -0000
Message-ID: <886190415.4650.0.nnrp-06.c2dec8c1@news.demon.co.uk>
References: <34D09806.3590@pophost.eunet.be>
Organization: ??


Wilmert De Bosscher wrote in message <34D09806.3590@pophost.eunet.be>...
>
>Hi there,
>
>Quite some years now, you can find in the shops a kind of plastic
>globe in which one central electrode is present. If the thing is
>switched on (working on batteries) plasma "plumes" are visible and these
>can be attracted to one side if the globe is touched from the outside.
>
>How does this work? Is the globe under vacuum and which gas is used?
>Is that an RF source in the center?

I think it's just a dc voltage. One can achieve a homemade plasma globe
using some forms of light bulb by applying a high voltage (20kV or so) to
the filament.

John.