Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019), 2019
The GRAPES-3 is a high-density extensive air shower (EAS) array located at Ooty India. The array ... more The GRAPES-3 is a high-density extensive air shower (EAS) array located at Ooty India. The array is presently operating with 400 plastic scintillation detectors (1 m^2 area each) with the inter-detector separation of 8 m spread over 25,000 m^2 and a large area (560 m^2) tracking muon detector. The variation in atmospheric pressure can significantly affect the observed cosmic ray flux measured by these detectors. We have simulated this effect by using the CORSIKA package after folding the detector response using GEANT4. The results of this work will be discussed during the conference.
Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019), 2019
The variations of the cosmic ray intensity observed at the Earth reflect the various solar activi... more The variations of the cosmic ray intensity observed at the Earth reflect the various solar activities through the variations of solar wind plasma that fills up the heliosphere. Thus, the correlation studies between cosmic ray intensity variations and the interplanetary plasma parameters, such as the solar wind speed, the direction, and the strength of interplanetary magnetic field (IMF), are expected to provide important information on the space weather near the Earth. We have observed the cosmic ray intensity with the large acceptance GRAPES-3 muon telescope, located at Ooty in south India since 2000. We have obtained interesting results concerning the diffusion coefficient of cosmic rays near the Earth from the regression analysis with the solar wind speed [Kojima et al., Phys. Rev. D 98 (2018) 022004]. In this conference, we will report the results of the regression analysis of the cosmic ray intensity variations with the IMF.
Preliminary investigations on selected number of Indian copper coins were carried out using non-d... more Preliminary investigations on selected number of Indian copper coins were carried out using non-destructive PIXE technique. 3 MeV proton beam from a pelletron accelerator was used for irradiation of these samples The computer code GUPIX was employed to get the elemental concentrations and the obtained results are provided as well as discussed.
Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021
Astronomical events such as Solar and Lunar eclipses provide the opportunity for studying the dis... more Astronomical events such as Solar and Lunar eclipses provide the opportunity for studying the disturbance produced in the atmosphere by these events and their effect on cosmic ray intensity. There are earlier reports on decrease in secondary cosmic gamma ray (SCGR) flux during solar eclipse and enhancement of the same during lunar eclipse. In this paper, we report the results from the measurement of SCGR flux during the solar eclipse on December 26, 2019 and two lunar eclipses on January 31, 2018 and July 27, 2018.
Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019), 2019
The GRAPES-3 is a high-density extensive air shower (EAS) array located at Ooty India. The array ... more The GRAPES-3 is a high-density extensive air shower (EAS) array located at Ooty India. The array is presently operating with 400 plastic scintillation detectors (1 m^2 area each) with the inter-detector separation of 8 m spread over 25,000 m^2 and a large area (560 m^2) tracking muon detector. The variation in atmospheric pressure can significantly affect the observed cosmic ray flux measured by these detectors. We have simulated this effect by using the CORSIKA package after folding the detector response using GEANT4. The results of this work will be discussed during the conference.
Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019), 2019
The variations of the cosmic ray intensity observed at the Earth reflect the various solar activi... more The variations of the cosmic ray intensity observed at the Earth reflect the various solar activities through the variations of solar wind plasma that fills up the heliosphere. Thus, the correlation studies between cosmic ray intensity variations and the interplanetary plasma parameters, such as the solar wind speed, the direction, and the strength of interplanetary magnetic field (IMF), are expected to provide important information on the space weather near the Earth. We have observed the cosmic ray intensity with the large acceptance GRAPES-3 muon telescope, located at Ooty in south India since 2000. We have obtained interesting results concerning the diffusion coefficient of cosmic rays near the Earth from the regression analysis with the solar wind speed [Kojima et al., Phys. Rev. D 98 (2018) 022004]. In this conference, we will report the results of the regression analysis of the cosmic ray intensity variations with the IMF.
Preliminary investigations on selected number of Indian copper coins were carried out using non-d... more Preliminary investigations on selected number of Indian copper coins were carried out using non-destructive PIXE technique. 3 MeV proton beam from a pelletron accelerator was used for irradiation of these samples The computer code GUPIX was employed to get the elemental concentrations and the obtained results are provided as well as discussed.
Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021
Astronomical events such as Solar and Lunar eclipses provide the opportunity for studying the dis... more Astronomical events such as Solar and Lunar eclipses provide the opportunity for studying the disturbance produced in the atmosphere by these events and their effect on cosmic ray intensity. There are earlier reports on decrease in secondary cosmic gamma ray (SCGR) flux during solar eclipse and enhancement of the same during lunar eclipse. In this paper, we report the results from the measurement of SCGR flux during the solar eclipse on December 26, 2019 and two lunar eclipses on January 31, 2018 and July 27, 2018.
Uploads
Papers by Pranaba Nayak