Reply To: FOCUS FUSION REACTOR

[Axil]

Is this fast enough?

This paper describes the design and implementation of a driver that allows an IGBT module rated at 800A/3300V to switch up to 3000A at 2200V in 3μS with a rate of current rise of more than 10000A/μS,

http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-12591.pdf

http://home.earthlink.net/~jimlux/hv/pasley1.htm

If you want to switch 50 kilo Amperes with a sub 20 nanosecond commutation time at 20kV you are going to be in trouble if you are relying on semiconductor technology. However there is an alternative class of devices that have been around long before the humble transistor came on the scene. You might think that vacuum tubes and similar are a thing of the past. But for problems of this magnitude they are the only things on the market that will do the job.

This application note describes the use of nanosecond SCR switch (thyristor) to enable circuit designers to upgrade high-current, high-voltage modulators and pulse generator circuitry.

http://www.eetindia.com/ARTICLES/2001SEP/2001SEP20_AMD_AN1.PDF?SOURCES=DOWNLOAD

All these solutions are in the lightning bolt range, you should find here something you like. If not, say why.