Abstract
The physics motivations and advantages of the new TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) detector are presented. TAIGA aims at gamma-ray astronomy at energies from a few TeV to several PeV, as well as cosmic ray physics from 100 TeV to several EeV. For the energy range 30 – 200 TeV the sensitivity of 10 km2 area TAIGA array for the detection of local sources is expected to be 5 × 10-14 erg cm-2 sec-1 for 300 h of observations. Reconstruction of the given EAS energy, incoming direction and its core position, based on the timing TAIGA-HiSCORE data, allows one to increase a distance between the IACTs up to 600-1000 m. The low investments together with the high sensitivity for energies ≥ 30-50 TeV make this pioneering technique very attractive for exploring the galactic PeVatrons and cosmic rays. At present the TAIGA first stage has been constructed in Tunka valley, 50 km West from the Lake Baikal. The first experimental results of the TAIGA first stage are presented.
Highlights
A detection of gamma rays is one of the most efficient ways of investigating of galactic and metagalactic sources of high-energy cosmic rays as well solving of many problems of astroparticle physics
The deployment of muon detectors with a total area of 250 m2 is planned as well. Such a complex with an area of approximately one square kilometer will make it possible to experimentally test the efficiency of the joint operation of the wide-angle Cherenkov array, Imaging Atmospheric Cherenkov Telescopes (IACT), and muon detectors for detecting gamma rays with energy above 30 TeV and will become the most sensitive instrument for solving the problems of highenergy gamma astronomy and make it possible to obtain the data on cosmic rays with energy above 100 TeV with the record-setting level of accuracy and statistics
Our immediate goal is to construct the first stage of the TAIGA gamma observatory before the end of 2019; it will include 110–120 wide-angle Cherenkov detectors on an area of 1 km2, three IACT, and 250 m2 of muon detectors
Summary
A detection of gamma rays is one of the most efficient ways of investigating of galactic and metagalactic sources of high-energy cosmic rays as well solving of many problems of astroparticle physics. The deployment of muon detectors with a total area of 250 m2 is planned as well Such a complex with an area of approximately one square kilometer will make it possible to experimentally test the efficiency of the joint operation of the wide-angle Cherenkov array, IACT, and muon detectors for detecting gamma rays with energy above 30 TeV and will become the most sensitive instrument for solving the problems of highenergy gamma astronomy and make it possible to obtain the data on cosmic rays with energy above 100 TeV with the record-setting level of accuracy and statistics. The rapid progress in the construction of the TAIGA gamma observatory is achieved through the use of technical experience accumulated during the development of a number of the wide-angle Cherenkov arrays (Tunka-13, Tunka-25 [2], and Tunka-133 [3]), as well as the Tunka-Rex radio array [4] and the Tunka-Grande scintillation array [5]
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