Speaker
Description
The basis of Experimental complex NEVOD located in MEPhI is the Cherenkov water detector NEVOD with volume of 2000 m^3 equipped with a dense spatial lattice of quasi-spherical modules (QSMs, 91 in total). Each module consists of six FEU-200 PMTs with flat photocathodes directed along the axes of the orthogonal coordinate system. Cascade showers with energies of 100 - 500 GeV were generated by near-horizontal muons of cosmic rays. Tracks of muons were reconstructed with a high angular (better than 1 degree) and spatial (about 1 cm) accuracy using the coordinate-tracking detector DECOR that is deployed around NEVOD.
The dependence of the intensity of Cherenkov radiation on the depth of the cascade shower development at various distances from its axis has been measured with the step of detalization about 0.5 m. Experimental results are compared with calculations of distribution of Cherenkov radiation for different models of cascade electron scattering.
On the basis of the obtained dependence, a technique of reconstruction of cascade parameters (energy, generation point, and axis direction) has been developed and tested by means of comparison with Geant4 simulation. Angular and energy accuracy of the technique are presented.
