학술논문
Probing atmospheric effects using GRAPES-3 plastic scintillator detectors
Document Type
article
Author
GRAPES-3 Collaboration; M. Zuberi; S. Ahmad; M. Chakraborty; A. Chandra; S. R. Dugad; U. D. Goswami; S. K. Gupta; B. Hariharan; Y. Hayashi; P. Jagadeesan; A. Jain; P. Jain; V. B. Jhansi; S. Kawakami; H. Kojima; S. Mahapatra; P. K. Mohanty; Y. Muraki; P. K. Nayak; T. Nonaka; A. Oshima; D. Pattanaik; M. Rameez; K. Ramesh; L. V. Reddy; S. Shibata; F. Varsi
Source
European Physical Journal C: Particles and Fields, Vol 84, Iss 3, Pp 1-11 (2024)
Subject
Language
English
ISSN
1434-6052
Abstract
Abstract The GRAPES-3 extensive air shower (EAS) array has been designed to study cosmic rays from 10 $$^{13}$$ 13 –10 $$^{16}$$ 16 eV. It employs 400 scintillator detectors spread across 25,000 m $$^{2}$$ 2 , mainly of cone-type and fiber-type, each covering a 1 m $$^{2}$$ 2 area. These detectors record EAS particle densities and arrival times, which are crucial for determining primary particle energy and direction. A decade (2013–2022) of EAS data is analyzed to investigate the dependence of particle densities on ambient temperature and atmospheric pressure. Notably, ambient temperature exhibits a delayed response, with a more pronounced delay in fiber-type detectors, while cone-type detectors exhibit a higher observed temperature coefficient. In contrast, atmospheric pressure instantly and uniformly affects both detector types, with Monte Carlo simulations backing the observed pressure coefficient. These findings established a reliable pressure coefficient for EAS within this distinctive energy range and contributed to the refinement of correction algorithms, ultimately improving particle density precision for more accurate shower parameter estimates.