From: "Marc H.Popek"
Subject: Re: Scary, high voltage power supplies. (7Kv, 50A, 50ns, 20Khz)
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Date: Sun, 10 Nov 2002 02:13:22 GMT
NNTP-Posting-Date: Sun, 10 Nov 2002 02:13:22 GMT
Organization: AT&T Worldnet
You are in the realm of pulsed power. 350 KW peak. 17.5 mJ per pulse. 350
watts cw power....
So, you charge a transmission line, 100 7 KV breakdown, 50 feet long, when
charging complete, prime power isolated, one end of transmission line
shorted via scr, thyratron, spark gap, other... this send impulse flying
down the line.. nearly the speed of light :-)
After 50 nS or so the wave front (delta 7 kv) arrives, with a fervour! you
get about 50 nS of pulse, and the trailing edge decays in a wobbly manner,
more slowly than the rise depending ont he "loads" (in this your laser tube)
That's the basic single pulse of power formation... re-charging time, and
life time is a different thing. Good luck.. sounds like a fun project
wrote in message
> I'm interested in making a copper-halide vapour laser.
> This is basically a tube with .01 bar of helium/neon in, some copper
> chloride (or bromide), which is heated to 400C, and large pulses of power
> This results in a bright green laser beam, with around 1% of the input
> energy, in an ideal case.
> I can get to 7Kv 50ma easily (microwave transformer, and a few diodes
> and caps).
> I'm less sure exactly how to go about pulsing it, though I am clear
> that I'll be doing it from another room, doubling up on all the
> switches and bypass resistors, and having voltmeters on all the caps.
> I assume there is no easy way of building a transformer capable of going
> from a 50ns 500A 700V pulse to 7Kv (I have a large number of BUZ80 800V,
> FETs around).
> Any thoughts?
> http://inquisitor.i.am/ | mailto:email@example.com | Ian
> "I am the Emperor, and I want dumplings." - Austrian Emperor,