TESTA GRIGIA NEUTRON MONITOR - REAL TIME DATA

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TESTA GRIGIA NEUTRON MONITOR The modular neutron monitor was installed at Testa Grigia in 2014. It was designed, realized and tested at the SVIRCO Observatory in Rome (INAF-IAPS). It consists of a LND 3He proportional counter of length 190.8 cm and diameter 5 cm, surrounded by 23 modules, each composed by a polyethylene reflector, with a hole housing a lead ring (producer) and a polyethylene inner moderator. Each component is reasonably light, since the weight of the heaviest element is lower than 23 kg, so only one operator is required for transporting and assembling the whole neutron monitor even in its biggest arrangement (about 800 kg). The possibility to transport it easily makes the instrument suitable for measurements in high mountains sites or in remote locations that are difficult to access. The average counting rate is 1730/min, corresponding to about 31% of a single unit standard NM-64 neutron monitor. Counting rates are corrected for pressure variation to the reference pressure of 642.6 hPa using a barometric coefficient of 0.72%/hPa. The vertical rigidity cutoff at Testa Grigia is R = 4.71 GV (2015).

Neutron monitor counting rate percent variation Last 27+27 days - Two hour average - Pressure corrected Neutron monitor counting rate percent variation Last 3 days - 15 minutes average