Kapanadze Cousin - DALLY FREE ENERGY

[verpies]

@Itsu
To eliminate the ringing, that is visible on the MOSFET waveforms, please implement the countermeasures marked in fuchsia color below.
Especially connecting pins 4 and 5 of the UCC27511 driver, exclusively and directly to the Source pin of the MOSFET using a thick stranded wire.

Also, remember to minimize the area of the fuchsia current loop and solder the fuchsia ceramic bypass capacitor (apx. 470nF) across pins 4 and 1 of UCC27511.

P.S.
The same length of looped wire can have different areas depending how it is shaped.  For example a Circle has the largest area for a given length of circumference. 
In this case, the loop is formed by the resistors (R1 & R2) between the MOSFET Driver and Q1, the leads of the Q1 itself, the direct wire between the Source of Q1 and pins 4&5, and the fuchsia bypass capacitor.

[verpies]

I don't post much (just one post so far ) but I read a lot many about various things and it may be useful for somebody to use that knowledge.

I don't want to discourage you from replicating Dally circuit but to give you some alternatives.

If you want to produce high voltage, high amperage, ultra short pulses without poking with DSRD you may consider using avalanche transistor pulse generator.

This is old news to the readers of this thread.
A while ago, Itsu made this low power avalanche based pulser and even did some cool TDR measurements on a coax, with it.
See this video.

Most likely this is the reason why you did not receive any feedback on your post.

[verpies]

There is latest news from www realstrannik.ru .
High-voltage , high-speed swithes :
www.alphalas.com/products/laser-accessories/high-voltage-switches-and-nano-second-generators.html

Thanks.
Aren't they very expensive?

[wasabi]

Yes, the 1:1 trigger isolation transformer is responding too slowly.

The capacitive trigger signal was much better.
We do not need a square pulse for the trigger signal - one needle up and one needle down is enough!

Did something happen to Itsu? - he has not been posting lately.

[TinselKoala]

He's probably in the lab, working. (where I should be too)
He replied to a question I asked on one of his YT videos last night, so he's OK up to then.