Thyratrons requirement

[ED85]

Hi there, I'm not sure if this belongs in this specific part of the forum, but please warn me if it doesn't


I've been searching through all kinds of thyratron databases (this is not normally my field of expertise (electron tubes)) in hopes of finding one which could do the job of making square pulses of about 200 microseconds at 40 amps.
I'm pretty sure lots of thyratrons could do the job, but, I just can't find anything to quote, no derating charts or anything. Some of them can switch tens of kA's, for a few microseconds, and I assume they could do the job of switching 40 amps at 200 microseconds, but I have no data to rely on.
I've contacted a few manufacturers, but they say you can't reliably use the average current rating as a tool for calculating maximum current for a given pulse width.

So if anyone knows for sure of a thyratron which can do that, the smaller the better (hopefully a glass envelope type), can you please tell me the model, and an example of such usage. It doesn't matter if it is a contemporary one or an old model, as long as it is confirmed that it has been used for these or higher ratings

Thank you

 

[Skogsgurra]

Does it have to be a thyratron?

Most thyratron applications except, perhaps, accelerator and radar applications use thyristors these days.

It is a question of current risetime and voltage. Do you have any specific requirements there that a modern thyristor couldn't meet?

Gunnar Englund

http://www.gke.org

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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

 

[ED85]

Thyristors could do it, but this is actually a theoretical model (I'm not building anything, I just need a good off-the-record quote for a practical model being able to do the job)
involving periodic bursts of gamma ray radiation, and I have limited this part of circuitry to tubes.

To be more specific, this thyratron is suppose to fire up an ignitron, and ignitron is suppose to drive a pulse magnet coil, but I won't go further in detail, it's a long story

The alternative is to use a pair of 3CPX1500A7 triodes, which could do the job, but If I could find a small glass thyratron, that would be a simpler solution.

I do know that thyratrons were historically used to fire up ignitrons, but I just can't find a practical example of such a thyratron to quote.