Oa. Gress et al., The study of primary cosmic rays energy spectrum and mass composition in the energy range 0.5-50 PeV with TUNKA Eas Cherenkov array, NUCL PH B-P, 75A, 1999, pp. 299-301
The Tunka-13 EAS array has operated two winter seasons since 1995 until 199
8 years. It consists of 13 Cherenkov light detectors based upon the QUASAR-
370 phototubes. The array covers the area 240x240 m(2) and measures the pri
mary energy, derived from Cherenkov light flux, and individual lateral dist
ribution functions (LDF). Good energy and angular resolution of the array p
ermits to study the irregularities in energy spectrum following the classic
"knee".