HELP with flash quenching IGBT/MOSFET

Hey guys,

Need help in finding an appropriate MOSFET/IGBT to pulse my hi energy flash
lamp.

I currently have a 100Ws rated flash lamp running at 330V / 1620uF (88Ws)

I'm want to do pre-flash followed by the main flash so I decided to use a
MOSFET to drive the trigger transformer and pulse shapping directly.

http://optoelectronics.perkinelmer.com/content/ApplicationNotes/flashlightingappnote.pdf
(page 3)


I've been using a MOSFET with ratings of 500V and 48A continuous/192A
pulsed. However, these MOSFETS have been dying on me after around 100
flashes... I did a current test flash pulse on them and found that it drew
about 70A peak with a pulse duration of around 15ms.

Is my MOSFET rated correctly???

If not, what rated MOSFET should I use??

What's the difference between an IGBT and MOSFET? I also used an IGBT (rated
for 85A continuous ) in place of the MOSFET and it failed to trigger with a
logic signal directly from the microcontroller (5V). I then tried to
manually trigger the IGBT with a 7V source and it only flashed once -
assumed I blew the IGBT... what am I doing wrong?

thanks...