Diurnal Variation of Cosmic Ray Intensity at Different Group of Geomagnetic Index (Ap)
International Journal of Astrophysics and Space Science
Volume 5, Issue 4, August 2017, Pages: 63-70
Received: Sep. 1, 2017;
Accepted: Sep. 22, 2017;
Published: Nov. 6, 2017
Views 1279 Downloads 43
Divya Dubey, Physics Department, AISECT University, Bhopal (Madhay Pradesh), India
Suryanshu Chudhary, Physics Department, AISECT University, Bhopal (Madhay Pradesh), India
Ambika Singh, Physics Department, NRI Institute of Information Science and Technology, Bhopal (Madhay Pradesh), India
Anil Kumar Tiwari, Physics Department, Govt. T. R. S. College, Rewa (Madhay Pradesh), India
The solar modulation of Galactic Cosmic Rays (GCR) is revealed in the record of neutron monitors in terms of daily variation. Day-to-day and long term basis daily variations have been investigated for the recent period from 1965 to 2015 along with geomagnetic disruption index Ap on twelve-monthly average basis. Here Ap index has been used as a placeholder for the solar bring on interplanetary disturbances. It is create that, in general on an annual average basis, both the diurnal amplitude as well as the diurnal phase is considerably lower in the years of low Ap values, through the period 1965 to 2015. Such as a result was also informed for the earlier periods. However, anomalous and determined results for the diurnal variations have been received when the daily values of Ap are diffused in five groups with the first group demonstrating low Ap condition (i.e. quite periods) and the last group naturally representing the disturbed conditions.
Anil Kumar Tiwari,
Diurnal Variation of Cosmic Ray Intensity at Different Group of Geomagnetic Index (Ap), International Journal of Astrophysics and Space Science.
Vol. 5, No. 4,
2017, pp. 63-70.
Jokipii, J. R. and Kopriva, D. A.; “Effects of particle drift on the transport of cosmic rays, III, Numerical models of galactic cosmic-rays”, Astrophysics Journal, 234, 384(1979).
Jokipii, J. R. and Davila, J. M.; “Effects of particle drift on the transport of cosmic rays, IV, More realistic diffusion coefficients”, Astrophysics Journal, 248, 1156-1161(1981).
Potgieter, M. S. and Moraal, H.; “A drift modal for the modulation of cosmic rays”, Astrophysics Journal, 294, 425-440 (1985).
Jokipii, J. R. and Kota, J.; “Cosmic rays near the heliospheric current sheet, 2. An ensemble approach to comparing theory and observation”, Journal Geophysics Research, 91, 2885-2888 (1986).
Potgieter, M. S., Le Roux. J. A., Burger, R. A.: 1989, Journal Geophysics Research. 94, 2323.
Mavromichalaki, H.; “Application of diffusion convection model to diurnal anisotropy data”, Earth, Moon and Planets, 47, 61-72 (1989).
Parker, E. N.; “Theory of streaming of cosmic rays and the diurnal variation”, Planetary Space Science, 12, 735-749 (1964).
Forman, M. A. and Gleeson, L. J.; “Cosmic ray streaming and anisotropies” Astrophysics Space Science, 32, 77-94 (1975).
Venkatesan, D. and Badruddin; “Cosmic ray intensity variations in the 3-dimentional heliosphere” Space Science Reviews, 52, 121-194 (1990).
Hall, D. L., Duldig, M. L. and Humble, J. E.; “Analysis of sidereal and solar anisotropies in cosmic rays”, Space Science Reviews, 78, 401-442 (1996).
Rao, U. R.; “Solar modulation of galactic cosmic radiation”, Space Science Reviews., 12, 719-809 (1972).
Agrawal, S. P. and Singh, R. L.; “Critical study of the diurnal and semi-diurnal variation of cosmic ray intensity on day-to-day basis”, Proceedings 14th International Cosmic Ray Conference., Munich (West Germany), 3, 1253-1257 (1975).
Agrawal, S. P. and Ananth, A. G.; “Average characteristics of cosmic ray diurnal anisotropy at relativistic energies”, Proceedings 13th International Cosmic Ray Conference, Denver (USA), 2, 1005-1010 (1973).
Agrawal, S. P. and Bercovitch, M.; “Study of 11, 22 year periodic variation of cosmic ray diurnal anisotropy”, Proceedings 18th International Cosmic Ray Conference, Bangalore (India), 3, 316-319 (1983).
Pomerantz, M. A. and Duggal, S. P.; “The cosmic ray solar diurnal anisotropy”, Space Science Reviews 12, 75-130 (1971).
Ahluwalia, H. S.; “Cosmic ray modulation near the onset and maximum phases of solar activity cycle 22”, Planetary Space Science, 40, 1227 (1996).
Belov, A. V., Eroshenko, E. A., Oleneva, V. A. and Yanke, V. G.; “Relation the Forbush effects to the interplanetary and geomagnetic parameters”, Proceedings 27th International Cosmic Ray Conference, Hamburg (Germany), SH 2.1, 9, 3552 (2001).
Tiwari, C. M., Agrawal, S. P., Tiwari, D. P., El-Borie, M. A., Shrivastava, P. K.; “Study of daily variation of cosmic ray intensity for the period 1989-2000”, Journal Current Science, 3(1), 219-222 (2003).
Singh, Y. P. and Badruddin; “Statistical consideration in superposed epoch analysis and its applications in space research”, Journal Atmospheric Solar Terrestrial Physics, doi:10.1016/J.jastp.2006. 01.007 (2006).
Singh, Ambika, Tiwari, Anil Kumar and Agrawal, S. P.; “ Study of High and Low Amplitude Wave Trains of Cosmic Ray Diurnal Variation during solar cycle 23”, Journal Astrophysics Astronomy, 31, 89-96 (2010).
Tiwari, Anil Kumar, Singh, Ambika, Agrawal, S. P; “Study of the diurnal variation of cosmic rays during different phases of solar activity”, solar physics, 279, 253-267 (2012).
Singh, Ambika, Dubey, Divya, Singh, Rukmani Pratap, Tiwari, Anil Kumar; “Variation of Upper Cut-off Rigidity of Cosmic Ray Diurnal Anisotropy”, International Journal Innovative Research Science Engineering Technology, Vol. 2, ISSUE 9, 4648-4654 (2013).