Study of Cosmic Ray Short Term Variations Using GRAPES-3 Muon Telescopes

Details Study of Cosmic Ray Short Term Variations Using GRAPES-3 Muon Telescopes Study of Cosmic Ray Short Term Variations Using GRAPES-3 Muon Telescopes

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3569n&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

We are operating a large area multi directional muon telescope as a part of the GRAPES-3 air shower experiment at Ooty (N 11.4, E 76.7 and 2200 m altitude). The muon detector has an area of 560 m2 and threshold energy of 1.0 GeV. Due to the large detector size, we are observing a very large number of muons, 1.8X108 /hour. The design of the muon detector allow us to measure muon intensity from 225 directions simultaneously. Therefore we are able to make a 2-dimensional map of cosmic ray intensity for protons of energy 65 GeV. Using the response functions for the these 225 elements of the muon telescope,observed intensity variation was analyzed esp ecially around the period of disturbance. And several Precursor variations which can be explained with Loss Cone model were founded.

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