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At present an experiment for measuring the flux of cosmic diffuse gamma rays with energy higher than 100 TeV (experiment "Carpet-3") is being prepared at the Baksan Neutrino Observatory of the Institute for Nuclear Research, Russian Academy of Sciences. The preparation of the experiment implies considerable enlargement of the area of both muon detector and surface part of the shower array. At the moment the plastic scintillation counters with a total continuous area of 410 m2 are installed in the muon detector (MD) underground tunnels, and they are totally equipped with electronics. Adjusting of the counters and their electronic circuits is in progress. Six modules of shower detectors (out of twenty planned to be installed) have already been placed on the surface of the MD absorber. A new liquid scintillation detector is developed for modules of the ground –surface part of the array, whose characteristics are presented. It is shown that the "Carpet-3" air shower array will have the best sensitivity to the flux of primary gamma rays with energies in the range 100TeV – 1PeV, being quite competitive in gamma-ray astronomy at such energies.

Results of four year cosmic ray anisotropy measurement, done with Baksan Carpet-2 array at the energy region 10-100 TeV, as a function of energy are presented. Data analysis was performed with East minus West method with subsequent Farley-Storey correction on anti-sidereal wave. The amplitude and phase of anisotropy for three integral energy ranges E > 17 TeV, E > 62 TeV and E > 100 TeV are reported.

A prototype of the PRISMA project array has been deployed and started running on the basis of the NEVOD complex at National Research Nuclear University MEPhI. It consists now of 32 detectors of a novel type (en-detector) sensitive to two main EAS components: electromagnetic (e) and hadronic (through thermal neutrons (n)) ones. The purpose of the array is testing and developing of a new experimental method of EAS study through neutron and electromagnetic components recording, optimization of the detector design and the data acquisition system. First experimental results are presented and compared with first Monte-Carlo simulations.

The characteristics of the thermal neutrons flux have been measured near the EAS core at the Carpet-2 EAS array. The thermal neutron detectors were placed on the floor of the tunnel of the Muon Detector (MD) and showers with a core near the MD were selected. Thermal neutrons multiplicity spectrum has been obtained for these showers. Measurements of the lateral distribution function of thermal neutrons at distances of 1-16 m from the shower axis have been performed. The mean number of the recorded thermal neutrons as a function of the number of hadrons crossing the MD has been measured.