Does This Schematic Look Right?

[AutogolazzoJr]

It's a high voltage power supply, ignore the diode at the bottom. The numbers on the flyback transformer are the number of turns.
This is the transformer and zvs driver:
http://highvoltageshop.com/epages/b73088c0-9f9a-4230-9ffc-4fd5c619abc4.sf/de_DE/?ObjectPath=/Shops/b73088c0-9f9a-4230-9ffc-4fd5c619abc4/Products/ZVS_Driver_kit_AC
My question: Should the earth ground be in place on the bottom half of the cascade? Or should it not be grounded?

[AutogolazzoJr]

bump

[AutogolazzoJr]

pls

[prasimix]

Yes, you can connect to ground any of secondary output, to have ground referenced output (output positive or negative to ground). But, I'm doubting that is enough for driving X-ray tube. Perhaps some sort of output current and voltage control should be necessary for prolonged tube lifetime. Maybe you should consult tube datasheet/manufacturer to see at least what is min. voltage (different anode needs different voltage, e.g. tungsten usually needs 60 kV, some other works starting with just 15-20 kV, etc.). There you can also get some idea about grounding.

[AutogolazzoJr]

I'm not using a real x ray tube, just an old soviet rectifier. There is some online documentation on how to produce x-rays with it:
http://4hv.org/e107_plugins/forum/forum_viewtopic.php?106277

[floobydust]

They're running over 0.1mA at 50kV through the 2X2 tube (5W good to 15 seconds but very hot).
2.2MEG 25W ballast resistor?
I'd consider smallish voltage-multiplier capacitors to give current-limiting instead. Ripple should get averaged out over the long exposure times.