12-20 July 2017
BEXCO
Asia/Seoul timezone
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Contribution

BEXCO - Room B(103/104/105)

[CRI282] Dependence of the GRAPES-3 EAS trigger rate and particle density on atmospheric pressure and temperature

Speakers

  • M. ZUBERI

Primary authors

  • M. ZUBERI (Tata Institute of Fundamental Research,India)

Co-authors

  • S. SHIBATA (Hiroshima City Univeristy,Japan)
  • L.V. REDDY (Tata Institute of Fundamental Research,India)
  • B.S. RAO (Tata Institute of Fundamental Research,India)
  • A. OSHIMA (Hiroshima City Univeristy,Japan)
  • K.P. ARUNBABU (Tata Institute of Fundamental Research,India)
  • S. AHMAD (Aligarh Muslim University,India)
  • A. CHANDRA (Tata Institute of Fundamental Research,India)
  • S.R. DUGAD (Tata Institute of Fundamental Research,India)
  • S.K. GUPTA (Tata Institute of Fundamental Research,India)
  • B. HARIHARAN (Tata Institute of Fundamental Research,India)
  • Y. HAYASHI (Faculty of Engineering, Aichi Institute of Technology,Japan)
  • P. JAGADEESAN (Tata Institute of Fundamental Research,India)
  • A. JAIN (Tata Institute of Fundamental Research,India)
  • V.B. JHANSI (Tata Institute of Fundamental Research,India)
  • S. KAWAKAMI (Faculty of Engineering, Aichi Insititute of Technology,Japan)
  • P.K. MOHANTY (Tata Institute of Fundamental Research,India)
  • H. KOJIMA (College of Engineering, Chubu University,Japan)
  • S.D. MORRIS (Tata Institute of Fundamental Research,India)
  • P.K. NAYAK (Tata Institute of Fundamental Research,India)

Description

The GRAPES-3 experiment, a high density extensive air shower (EAS) array located at Ooty, India is designed for high precision measurements of cosmic ray energy spectrum and nuclear composition in energy range of 10^{13} – 10^{16} eV. It consists of tightly packed 1 m^2 area 400 plastic scintillation detectors covering an effective area of 25,000 m^2 . The trigger rate and particle density measured by EAS array shows strong correlation with the atmospheric parameters such as the pressure, and temperature. By employing linear regression, and Fast Fourier Transform techniques, the pressure and temperature coefficients for the dependence of trigger rate and particle density, respectively were obtained. Thereafter, by applying corrections for these effects the contribution of atmospheric effects was largely eliminated in the EAS data. These corrections are expected to result in a better measurement of EAS parameters which will be presented during the conference.