Neutron Counter SNM18-1 SNM-18-1 NOS Lot of 1

Description

Counter neutron corona SNM-18-1
Also, this device may be called: SNM 18 1, SNM181, SNM18-1, snm-18-1, snm 18 1, snm181, chm-18-1.
SNM-18-1 corona neutron counter is designed to register slow neutrons.
Technical characteristics of SNM-18-1
The voltage to start counting or ignition of the crown is from 1450 V to 1650 V.
The length of the plateau counting characteristics - not less than 1500 V.
The slope of the plateau counting characteristics of the corona neutron counter SNM-18-1 is 0.3% / V.
Recommended operating voltage - from 1700 V to 3000 V.
Operating voltage - 2500 V.
Own background counter SNM-18-1- not more than 0.083 s-1.
Efficiency to thermal neutrons - 70%.
Change of counting rate - no more than 10%.
The average corona discharge current of the SNM-18-1 neutron counter is no more than 25 μA.
Insulation resistance - not less than 1 · 1010.
Output capacity - from 5 pF to 7 pF.
The body is metal.
Service life - at least 1500 h.
Overall dimensions - 32 × 32 × 320 mm.
Mass - not more than 180 g.
Operating conditions SNM-18-1:
Ambient temperature:
- working - from -40 ° C to + 150 ° C;
- normal - from + 15 ° С to + 25 ° С.
The use of the stable corona discharge mode in the instruments of the SNM-18-1 meters allows you to:
- to operate the counters on the background of gamma radiation not more than 1000 X-rays per hour;
- to obtain the amplitude of the useful signal no more than hundreds of millivolts;
- to obtain a plateau counting characteristics with a length of several hundred volts.
Thank you and good luck.