From: "McMendes" <jcm310@hotmail.com>
Newsgroups: sci.physics.plasma
Subject: DC plasma discharges
Date: Tue, 13 Jan 2004 08:29:27 -0000
Organization: Ye 'Ol Disorganized NNTPCache groupie


Hello everyone!

I'm using a DC plasma reactor. I create a H2+CH4 plasma when I apply a 300V
DC voltage. Very stable. Then I start applying a DC voltage to a filament
and I get glow discharges between one of the filament electrodes and one of
the plates used to ionise the plasma.

I don't get it. When I create the plasma, that means I ionise it. So why do
I have new ionisations when I have the discharges? Are new species ionised?
And how can I help it? I've tried using higher pressures (to make the plasma
"smaller") but then it gets denser and more conductive; I've also tried to
increase the distance between the filament and the plate. Anymore
suggestions?

Any help will be very welcome. Thanks!




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