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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
OAUGDP devices can be miniaturised as well by using modern microcontrollers to generate the required 60 kHz +/- 200Hz waveforms applied to alternate wires of the hdd cable using a pair of CCFL transformers.
Beats using ignition coils and the efficiency is far better. -A
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Pinky's Brain wrote ...
Again though, the plastic is probably not great for longevity.
Yes, it's best not to take the 'cold' in 'cold plasma' too literally. It can easily mean 2000 K, much more than enough to burn the toast!
Afterthought added on: I was thinking about your earlier post where you suggested that higher frequency would allow higher input power - which I guess would be the case were a GD a simple capacitive load.
As it is, the literature shows that electrons can be hearded through DC air-at-atmospheric pressure GDs at a rate of amps, so already the model becomes a lot more complex.
Registered Member #3282
Joined: Wed Oct 06 2010, 05:01PM
Location:
Posts: 224
have you ever thought that the glow discharge is produced by very fats pulses of high voltage in a set up similar to a plasma cutter. find a way to make 50 nanosecond pulses @12kv
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Microwatt wrote ...
have you ever thought that the glow discharge is produced by very fats pulses of high voltage in a set up similar to a plasma cutter. find a way to make 50 nanosecond pulses @12kv
Yes, there are a number of papers on nanosecond pulse GD phenomena, e.g.
David Z Pai et al Nanosecond repetitively pulsed discharges in air at atmospheric pressure—the glow regime Plasma Sources Sci. Technol. Vol 18 No. 04 2009
Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
I've seen lots of papers which use short pulses with exposed electrodes to create active species ... but barrier discharge obviously can also be used for the same thing and it's far far simpler.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Pinky's Brain wrote ...
I've seen lots of papers which use short pulses with exposed electrodes to create active species ... but barrier discharge obviously can also be used for the same thing and it's far far simpler.
Simplicity and low cost, preferably by using stuff most of us have already - variacs, NSTs, and such - would get my vote too, Pinky - if it were my thread that is!
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Hand Sanitizing Plasma Device
