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Re: 'Glow' discharge
For MHD work you really should use direct current not RF as produced by
TC's. Also, you want a higher pasma density so current is the name of the
game to achieve high plasma density. A rectified pole xmfr output should
provide all the power you require.
Dr. Resonance
-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Thursday, February 17, 2000 12:33 AM
Subject: 'Glow' discharge
>Original Poster: "Sarah Thompson" <sarah-at-telergy-dot-com>
>
>Hi,
>
>I'm new to the list. I've not yet built a TC, so I'll refrain from asking
>lame questions until such time as I'm half way through it and can't get it
>working. :)
>
>The reason I want to make a TC is for the purpose of creating ionised gas
>for experiments in MHD. Before I start figuring out how big a coil to make,
>I was wondering if people out there can answer a couple of questions about
>the kind of voltage levels that will be necessary.
>
>One experiment I want to do is related to MHD power generation. I'd like to
>be able to ionise the air moving along a non-conductive pipe, whilst also
>causing a hefty current to flow across it (through the gas). The electrodes
>need to be longitudinal with respect to the pipe, and maybe 1 - 2" apart
and
>parallel. If the theory works, it should be possible to blow gas through
the
>pipe and extract power from a coil wound around the pipe. I suspect that a
>neon transformer on its own might be enough, but I'm willing to accept
>advice on this.
>
>The other experiment is a little weirder. What I'd like to be able to do is
>create an even 'glow' discharge around a spherical or dome shaped
conductor,
>such that the air around the conductor gets ionised, but streamers or
sparks
>are avoided. Is this even possible with a TC? If so, what kind of voltage
>would be necessary for a moderate sized dome or sphere? I'd guess that a
>pretty high voltage will be necessary, but avoiding arcing would seem to be
>the hardest bit.
>
>Thanks in advance,
>Sarah Thompson
>
>
>