Cosmic Ray laboratory of
Institute of Solar-Terrestrial Physics
(Siberian branch RAS)

Neutron Monitor (Cosmic Ray Observations)
is situated in Irkutsk (Russia)
Po - average barometric pressure        
Rc - effective geomagnetic cutoff rigidity
Height - location above sea level          
SF - scaling factor                    

Latitude:
Longitude:
Height:
Type Instrument:
SF:
RC:
P0:

52.28°   N
104.02°   E
475     m
18-NM-64
100            
3.56    GV
960.0   mb



   For recording the CR (Cosmic Rays) neutron component at Irkutsk,
neutron monitor NM-64 is used, which is an installation with 18 two-meter proportional counters filled with BF3 (boron trifluoride gas) in which the B10 isotope has been enriched to >90 per cent of the total boron. The counters surrounded by the moderating material (polyethylene) and generating material (lead). A total weight of the installation is more than 30 tons. The neutron monitor is located at 475m above sea level.