Re: New He3 4Atm Tubes available
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Re: New He3 4Atm Tubes available
I'm interested!, sounds good.
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Re: New He3 4Atm Tubes available
I would assume a charge amp feedback capacitor of 1pf. This gives you a gain of 1V/picocoulomb. The value is also pretty standard. For example, it's used in the Ortec 107, a good old workhorse charge amp.
Re: New He3 4Atm Tubes available
Geo -
I don't understand about the additional information your supplier needs. It would seem to me that a specific tube geometry, diameter, length and fill pressure, will generate a specific size charge pulse for a given type (energy) of detected event.
Is he seeking is some idea what source equivalent circuit is assumed in a commonly used charge sensitive detector?
From where I sit, a 1 pC discharge would be rather large, but a 1 pF feedback capacitance would allow perhaps fC detection levels, which seems pretty nice.
Dave Cooper.
I don't understand about the additional information your supplier needs. It would seem to me that a specific tube geometry, diameter, length and fill pressure, will generate a specific size charge pulse for a given type (energy) of detected event.
Is he seeking is some idea what source equivalent circuit is assumed in a commonly used charge sensitive detector?
From where I sit, a 1 pC discharge would be rather large, but a 1 pF feedback capacitance would allow perhaps fC detection levels, which seems pretty nice.
Dave Cooper.