Re: Neutron detector tubes
Posted: Sat Apr 23, 2011 6:16 pm
Doug, most of the stuff that I found so far is in old scientific journals that you have to pay for a copy of, but I'm still looking.
That being said, here's my crack at translating Russian again for a similar type of tube...
...a little different than a GM tube and the series resistor is about 10X higher resistance. Also, notice the 500kHz amplifier requirement.
The other data that I found is here, which looks like the same data posted on the auction. For some reason when you flip back and forth between the original and translated page the tube number changes from CHM-14 to SNM-1914... I don't know where the "19" is coming from, but the specs are the same.
It looks like there may be 2 different operating modes for these tubes based on the 2 charts. The first one being just as a typical B10 "Neutron counter" and the second one being the "Proportional and Crown neutron counter" which is the coronal discharge mode.
Edit: Here is the link to where I found the datasheet posted above.
Edit again: Somewhere in my searches I saw a reference to 100M series resistors used also, so they should be big whatever they are, which seems logical. And the gstube.com site in the link above has a nice variety of tubes that are apparently for sale so it's worth a look.
That being said, here's my crack at translating Russian again for a similar type of tube...
...a little different than a GM tube and the series resistor is about 10X higher resistance. Also, notice the 500kHz amplifier requirement.
The other data that I found is here, which looks like the same data posted on the auction. For some reason when you flip back and forth between the original and translated page the tube number changes from CHM-14 to SNM-1914... I don't know where the "19" is coming from, but the specs are the same.
It looks like there may be 2 different operating modes for these tubes based on the 2 charts. The first one being just as a typical B10 "Neutron counter" and the second one being the "Proportional and Crown neutron counter" which is the coronal discharge mode.
Edit: Here is the link to where I found the datasheet posted above.
Edit again: Somewhere in my searches I saw a reference to 100M series resistors used also, so they should be big whatever they are, which seems logical. And the gstube.com site in the link above has a nice variety of tubes that are apparently for sale so it's worth a look.