Help with Mercury Arc Lamp smps

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mandongo

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Hello!!

I need help with a smps intended to power up a mercury vapour lamp
for microscope (100 Watt Microscope Mercury Arc Lamp).

I lack the schematics, but following the circuitry, realized that the schematics are pretty much like the showed in the attached image.

If someone could give some guidance on what is going on in this circuit, specially in the inductances and the red encircled part of the diagram (which i think is a half-bridge bjt topologie) i shall be in debt for ever.
Thanks in advance.

For your time and knowledge thank you very very much!!
 

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