Method of Global Survey by Data of Muon Telescopes
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ELEMENTARY PARTICLES AND FIELDS Experiment
Method of Global Survey by Data of Muon Telescopes V. G. Grigoryev1)* , P. Yu. Gololobov1), P. A. Krivoshapkin1), G. F. Krymsky1), S. A. Starodubtsev1) , A. S. Zverev1) , and V. G. Yanke2) Received July 31, 2019; revised July 31, 2019; accepted July 31, 2019
Abstract—A new variant of a global survey method that allows obtaining information on the first two angular moments of cosmic ray distribution function in the interplanetary space using the data of continuous hourly registration of muon telescopes of the GMDN network and the Yakutsk cosmic ray spectrograph is presented. A calculation of receiving characteristics for the telescopes and accounting of the temperature effect that are necessary for a successful realization of the method are carried out. The results of application of the method in definition of cosmic ray anisotropy parameters are analyzed for the period 2012–2018. DOI: 10.1134/S1063778819660220
1. INTRODUCTION The global survey method [1] developed in ShICRA in the 1960s and other analogous methods [2–4] are able to consider the worldwide network of neutron monitors as one single multidirectional device that covers at every measured time moment almost all celestial sphere. In this case, the obtained information on the distribution of cosmic rays (CR) reflects a global picture of modulation processes and their dynamics in the interplanetary medium. Development of a worldwide network of muon telescopes makes possible a realization of the CR investigation method analogous to the global survey one but using the data of muon intensity measuruments. Effective energies of particles that are registered by muon detectors are much higher than those registered by neutron monitors and the obtained information would allow investigating dynamic processes in the distribution of CR that reflects the structure of the heliosphere in its distant areas. Modern muon telescopes simultaneously register CR from more than 10 different narrow-angle directions. Thus, using the data of several stations of muon telescopes would allow implementing a sufficiently informative method of definition of the parameters of CR distribution in the heliosphere. It became possible with the creation of the Global Muon Detector Network GMDN [5] and the Muon Detector DataBase MDDB 1)
Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy, Siberian Branch, Russian Academy of Sciences, Yakutsk, Russia. 2) Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences, Troitsk, Moscow, Russia. * E-mail: [email protected]
[6]. In the current work the method is presented. Also, the preliminary analysis of the results of realization of the global survey using continuous 1-hour measurements of muon telescopes of the GMDN and Yakutsk station is carried out. 2. METHOD OF GLOBAL SURVEY BY DATA OF MUON TELESCOPES The suggested approach on using the data of measurements of muon telescopes is a variant of the wellknown global survey method [1] that is based on using
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