 Low ripple HV PSU design
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JulietMikeBravo
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Sun Jun 10 2012, 09:51AM
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Registered Member #5136
Joined: Sun Jun 03 2012, 03:07PM
Location: Utrecht, Netherlands
Posts: 6
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I have been messing around with PMTs and scintillation detectors for some time now and if you want to do some gamma spectroscopy you need a very stable, low ripple HV power supply. You can buy these on eBay, the so called NIM HV modules/bins but people know the value of these PSUs so they are sold for "proper" prices.
I'm just wondering, is it possible to make these power supplies yourself? I haven't found any schematics of these HV units until now so I don't know how they exactly work. My guess is a feedback driven HV generator with a stable, temperature independent reference voltage and very well designed filtering and overall use of high quality components.
Anyone here who has experience with these PSU's and can tell more about them?
I currently have a part DIY PSU with a Hamamatsu HV module which works fine but it has a max voltage of 1250V which cannot drive PMTs that require higher voltages.
BTW, there are some decent designs out there that should suffice for basic use, like  and
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Pinky's Brain
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Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
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That ripple stripper in the second circuit is pretty cute ... never considered that option.
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