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The idea of a novel type detector array is the following: delayed thermal neutrons generated by hadronic component of Extensive Air Showers (EAS) can be detected over the whole array area using special electron-neutron detectors (en-detectors). The array PRISMA-32 consists of 32 en-detectors, deployed over the area of 450 m 2 . En-detectors are able to detect two main EAS components: electromagnetic one in a case of a synchronous passage of several charged particles, and hadronic component through thermal neutron captures. Detectors are based on a specialized inorganic scintillator, being a granulated alloy of ZnS(Ag) with LiF, enriched up to 90% with 6 Li isotope. The array is triggered by the electromagnetic component of EAS, and provides information about the energy deposit (mostly electrons) and delayed neutrons accompanying the EAS within 20 ms after the trigger. During 2 years of operation more than 10 5 events were recorded. Examples of EAS detection are presented.

The purposes, tasks and design features of the new measuring system of the Cherenkov water detector NEVOD are discussed

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A new approach to investigations of ultra-high energy cosmic rays based on the ground-level measurements of the spectra of local density of EAS muons at various zenith angles is considered. Basic features of the local muon density phenomenology are illustrated using a simple semi-analytical model. It is shown that muon density spectra are sensitive to the spectrum slope, primary composition, and to the features of hadronic interaction. New experimental data on muon bundles at zenith angles from 30° to horizon obtained with the coordinate detector DECOR are compared with CORSIKAbased simulations. It is found that measurements of muon density spectra in inclined EAS give possibility to study characteristics of primary cosmic ray flux in a very wide energy range from 10 15 to 10 19 eV.

The array of wide-angle Cherenkov detectors, HiSCORE, which is presently under construction in the Siberian Tunka valley, is going to be complemented by a network of Imaging Atmospheric Cherenkov Telescopes (Tunka-IACT). Together they will form the TAIGA Gamma Ray Observatory. The hybrid operation of HiSCORE and Tunka-IACT considerably lowers the energy threshold of HiSCORE. In this article, we describe the IACT design and the camera measuring system which is based on the read-out chip (ASIC) MAROC3. We present and discuss first test results of the detection channels.