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Reasons for a GS-2000 PRO

Posted: 14 Nov 2017, 10:36
by Springdream
Hi everyone,
I read the information on the GS 2000 that you do not recommend it for NAI scintillators.
If not, what is the purpose of the higher voltage? Or is there another benefit compared to the 1100 PRO?
Thank you,

Re: Reasons for a GS-2000 PRO

Posted: 14 Nov 2017, 11:32
by Steven Sesselmann

The only real difference between the GS-1100-PRO and the GS-2000-PRO is the SHV connector. Rated for higher voltage it allows you to turn up the bias to 2000 volts without the connector arcing. Most PMT's work nicely at 650-700 volts, occasionally if the PMT is old or if you have a crystal with a low light output you might turn it up a little higher for more gain.

The detectors that require higher bias are proportional counters, like some neutron counters that work on a bias of 1400 to 1600 Volts.

If you choose to go with a GS-2000-PRO you also have to consider the extra cost of SHV cables and adaptors.


Re: Reasons for a GS-2000 PRO

Posted: 14 Nov 2017, 12:09
by stamasd
In my case I chose the GS2000Pro because I have a few probes that require 1600-1650V. And since my previous setup already uses SHV connectors and cables, that's really not a downside for me.
Also, for probes that don't require high voltages you can use easily a plain BNC cable with an inexpensive SHV/BNC adapter that I found on