Re: Power supply design help needed

From: Robert Wolcott (rwolcott23_at_yahoo.com)
Date: 09/19/04 

Date: Sat, 18 Sep 2004 19:03:40 -0700

Thyratrons are still used for these because of the transients I believe.
They are still the #1 choice for the copper halide and copper vapor lasers.

Thanks,
Bob

"Rich Grise" <null@example.net> wrote in message
news:_q53d.923$2A1.143@trnddc08...
> On Saturday 18 September 2004 08:59 am, Tweetldee did deign to grace us
> with
> the following:
>
>> The required output of the HVDC is quite obvious... the block in red is
>> described by the graphics at the top. Its output is an 11,000 volt
>> pulse,
>> swtiched at 50kHz. However, it's unclear whether the pulse is rectified
>> before being fed to the pulse forming network. I suspect that the final
>> output of the HVDC supply should be +11,000 VDC, at (according to the
>> transformer power requirement) 1500 watts. That translates into +11,000
>> volts at 140 ma.
>
> The output after the thyratron and flyback coil is, indeed 11000V, but
> the output of the red block called DC\nHV is 339V, presumably at
> (1500/339) * (1/efficiency) amps.
>
> There are probably much more modern pulse-forming circuits around - is it
> even possible to still get a thyratron?
>
> Good Luck!
> Rich
>