Photomultiplier HV power supply schematic - Electronic Circuits Projects Diagrams Free

captainhannes · 5th October 2003, 08:53 AM

Hi all!

I googled a lot, but it seems there is no photomultiplier high voltage power supply schematic out there.
Does anyone have such a schematic ?
Preferably, but not necessarily without a transformer. I suppose a simple cascade will do too, since it 'only' requires about 1kV (?)
Those photomultiplier packages with a required power supply of 5VDC or 12VDC don't have any transformer aswell, do they ?

Thank you very much in advance!

All the best,
Hannes.

Sebi · 5th October 2003, 01:29 PM

For the photomuliplier need 80...150V potential-difference between the dinodes. So the (negative) high voltage depend from number of dinodes, and must be stabilised. Because the last two dinodes suck more current, better using two supplies: one for last dinodes with higher current (about 2mA, HI) and another high voltage supply with resistor-divider (about 1500...1800V 1mA)

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5th October 2003, 08:53 AM	(permalink)
captainhannes	Photomultiplier HV power supply schematic Hi all! I googled a lot, but it seems there is no photomultiplier high voltage power supply schematic out there. Does anyone have such a schematic ? Preferably, but not necessarily without a transformer. I suppose a simple cascade will do too, since it 'only' requires about 1kV (?) Those photomultiplier packages with a required power supply of 5VDC or 12VDC don't have any transformer aswell, do they ? Thank you very much in advance! All the best, Hannes.

5th October 2003, 01:29 PM	(permalink)
Sebi	For the photomuliplier need 80...150V potential-difference between the dinodes. So the (negative) high voltage depend from number of dinodes, and must be stabilised. Because the last two dinodes suck more current, better using two supplies: one for last dinodes with higher current (about 2mA, HI) and another high voltage supply with resistor-divider (about 1500...1800V 1mA)