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Michael, Detectors with PMT's wired for negative HV are relatively uncommon. Hamamatsu seems to be the one who promotes this scheme, but for all the thousands of GS unit's I have made, only 2-3 customers ever asked me for negative bias. When I was making the original GS-1100A it was easy to flip the...
Hi All, This weekend I have been busy making a neutron detector kit for a local client, it turned out good and I should probably add it to my range of products. The detector is based on a Russion He3 corona tube called SI19N and according to the specs. it has an nvth (efficiency to thermal neutrons)...
Hi Andrey, The BNC connector is a signal output when the switch under the GS is pushed towards the connector and converts to an input when the switch is pushed the other way. What you get from the BNC is the decoupled signal straight off the coupling, but because it is not disconnected from the rest...
- 19 Jul 2020, 22:28
- Forum: Detectors
- Topic: Pulse height shift with pulse rate?
- Replies: 9
- Views: 1286
Mike et.al., I just did a quick test with the GS-USB-PRO and one of my standards GS-1515 NAI detectors using a Cs137 source placed at 15, 10, 5, and 1 cm. with count rates varying from 221 cps, to 1710 cps. and see no significant drift. The slight drift we see is more likely due to temperature chang...