Figure 1: Cube Monitor.


The Cube assembly (Figure 1) consists of two 20-cm thick scintillators of 0.25-m^2 area each, enfolded by 1-cm thick, 1-m^2 area scintillators. This design ensures that no particle may hit the inside 20 cm without hitting the surrounding ‘‘veto’’ scintillators. The 20-cm thick plastic scintillators are overviewed by the photomultiplier PM-49 with a large cathode operating in a low-noise regime. Surrounding detectors (six units) are 1-cm thick molded plastic scintillators. The efficiency of neutral component detection by 1-cm thick scintillators is ~2% and weakly depends on the energy of gamma rays. The energy losses of passing electrons and muons in 20-cm-thick plastic scintillator are ~40 MeV. Taking into account the construction material of the detector (2-mm iron tilt and 1-cm plastic scintillator), and the roof of the building (1-mm iron tilt), the electron registration energy threshold for the upper 20-cm-thick scintillator is estimated to be about 8 MeV and the bottom one ~40 MeV for the vertical flux. The obtained efficiency of gamma ray registration equals ~20% and weakly depends on energy. 

Efficiency of neutron detection in the range 4-100 MeV, in 20 cm thick scintillator is ~27%. CUBE assembly has been tested in Yerevan at 1000 m. a.s.l. and in 2010 installed at high altitude “Aragats” research station (3200 m a.s.l.). It has been included into Aragats Space Environmental Center (ASEC) since September 15, 2010; the on-line time series are available from the CRD portal: 

More description of the Cube detector can be found in A. Chilingarian et al. Atmospheric Research 114–115 (2012)