Message-ID: <3DCD7170.F4679053@webaccess.net>
From: Chuck Simmons
Organization: You jest.
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Subject: Re: Scary, high voltage power supplies. (7Kv, 50A, 50ns, 20Khz)
References: <3DCD6C11.B2F1F01D@webaccess.net>
Date: Sat, 09 Nov 2002 20:35:03 GMT
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NNTP-Posting-Date: Sat, 09 Nov 2002 12:35:03 PST
Chuck Simmons wrote:
>
> root@mauve.demon.co.uk wrote:
> >
> > 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
> > applied.
> > 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, 4A
> > FETs around).
>
> This appears to be an ideal application for a hydrogen thyratron. These
> are made for radar modulators and laser pulsers and are available from
> several companies. Some application information may be available as
> well.
>
> I did a little looking around and I found both 5C22 and 4C35 hydrogen
> thyratrons in stock. They are a bit pricey. Both types are currently
> manufactured. I can't remember the critical specifications but I'm
> pretty sure either would do (the 5C22 is larger and can handle more
> current).
A bit more.
http://www.wps.com/archives/tube-datasheets/Datasheets/Amperex-CC-363/12.JPG
Both tubes indeed look OK.
Chuck
--
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons chrlsim@webaccess.net