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Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
No, an electrode somewhere between would disturb the field. Do a google images search for "triggered spark gap". The first image that comes up, 735x448, members.tm.net, shows the arrangement you want. The trigger electrode is off to the side. There are two possible ways that the side spark triggers the main gap, either might be dominant depending on geometry. The UV from the trigger spark ionises the space in the main gap, or ions from the trigger spark get dragged into the main gap. Either way, a gap that is just too wide to break down spontaneously will go, and a gap that is far too wide still won't.
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
scytheavatar wrote ...
I need to produce around 165dB to 200dB of sound relative to 1uPa, which works out to mean a circuit producing somewhere between 200W to 600W of power. The sound doesn't need to be periodic, but preferably there should be a way to control the duration and the magnitude of the sound produced.
Uh . . .
You aren't going to get anywhere near those sound pressure levels from an amateur built marx generator. Even large commercial marx generators would have difficulty reaching those sound pressure levels.
Just for comparison, a typical rife shot at 1meter (i.e. 270 or 30/06 caliber) produces about 140dB. And thats WAAAAYYY louder than any amateur marx generator i've ever built or seen. And you want to produce 165dB which is almost 500 times more powerful??
And 200dB? Sounds like something isn't quite right. 200dB pressure level is equivalent to 63 lbs of TNT at 1meter going off. (Ref: US Dept. Defense Hyperdynamics Table)
My advice is to first get an understanding of just what the magnitudes of sound pressure levels really equate and are calculated.
If you try to do this with a marx generator, your just wasting your time.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
I would use a large cap bank (say 5000uF or more at 1kV) and use this to explode a thin copper wire. I think this is the best way of creating controlled high pressure shock/sound waves.
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Dr. Kilovolt wrote ...
I would use a large cap bank (say 5000uF or more at 1kV) and use this to explode a thin copper wire. I think this is the best way of creating controlled high pressure shock/sound waves.
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Marx Generator trigger circuit?
