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High Voltage Power Supply for Multiplier Tube
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H713:
Royer converter is a perfectly viable, if a bit complex solution. I've never used one, so I can't comment on the difficulty of implementing one in the real world. What I can say is that I have used the voltage multiplier with a 120:120 transformer many times, and it works well. It also doesn't require any exotic or hard-to-find components. 1N4007s, an inexpensive off-the-shelf transformer and readily available capacitors and zeners. At 2mA you don't need huge filter caps anyways, especially if you regulate it with a 2kV zener string.

All depends on how far you want to go with this.
Tomsik:
Sorry, but I'm afraid you don't understand my question. I want a power supply with a transfer ratio 5-24VDC to 2000VDC. You offer the solution with 120:120 transformer, but my input voltage range requires 5-24VDC no 120VAC. I don't understand how your solution can help me, please explain it. Anyway, thanks for the reply.

For now, I'm testing a Royer resonator with a quad multiplier and regulation.
radix:
I'm a bit late to the party, but I hope it'll be useful anyway...
Here is a boost converter with a voltage multiplier meant for powering PMTs: https://www.theremino.com/en/technical/schematics#pmtadapter If the translations are a bit weird, try the (original) italian version: https://www.theremino.com/technical/schematics#pmtadapter
To raise the voltage you just need to change the feedback divider a bit (it's all described there).
H713:
Sorry, I wasn't aware of your 5-24VDC input requirement.
Tomsik:
I tested a royer circuit with CCFL tranformer and voltage multiplier. Transformer has a ratio 1:67, 6W and Ioutmax 5mA. As voltage multiplier is 4x10nF and diodes (1000V)
I'm not able to achieve a voltage about 2200V and 2mA, because voltage multiplier consumes a lot of current (approx 22mA), on load is 800V (1Mohm).
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