1. Determination of the characteristics of SNM-17 type neutron counters
Summer practice
Determination of the characteristics of SNM-17 type neutron counters
Instructor: A. V. Churakov (FLNP, JINR)
Student: Vojtech Bula (Czech Technical University in Prague)
JINR, 2007

2. Principles of thermal neutrons registration with gaseous counters
3He+n = 3H + p MeV
10B+n = 7Li + 4He MeV (7%)
= 7Li*+4He MeV (93%)

3. Experimental Setup

4. Counting response
cascade ionisation
plateau

5. Amplitude spectrum
0.77 MeV
3He+n = 3H + p MeV

6. Results: 1. Counting response: plateau 1350 – 1730 V
2. Recommended HV: 1400 V
3. Energetic resolution MeV): 7.5%