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Name: Srikar Tadepalli Affiliation: U R Rao Satellite Centre Conference ID: ASI2020_369 Title : Observations of Particles in the Geotail by CLASS on Chandrayaan-2 indicate a Dynamic Space Environment Authors and Co-Authors : Srikar P Tadepalli(1), S. Narendranath(1), Ranadeep G. Dastidar(2), Souvik Roy(2), Arnab Basak(2), Arghya Mukherjee(2), Dibyendu Nandy(2) 1. Space Astronomy Group, UR Rao Satellite centre, ISRO, Bengaluru 2.Center of Excellence in Space Sciences India (CESSI), IISER Kolkata Abstract Type : Oral Abstract Category : Sun and the Solar System Abstract : The Earth’s Geomagnetic tail is a dynamic region that hosts a multitude of plasma processes governed by interactions of the magnetized solar wind with the Earth’s magnetosphere. The manifestations of these processes are observed across the spatial extent of the geotail, detected across the large-domain of the inner magnetosphere and the ionosphere. Signatures of these phenomena vary depending on the state of magnetosphere and the external forcing from the Sun. Chandrayaan-2 large area X-ray spectrometer (CLASS) on-board the Chandrayaan-2 orbiter has observed enhancements in particle flux as the spacecraft travels through the geomagnetic tail. The instrument, which is primarily designed to work as a X-ray spectrometer, is also sensitive to energetic particles. From the instrument response simulations, it is estimated that these enhancements are due to the energetic electrons (>30 keV) flux in the geotail. We have compared particle enhancements using CLASS along with particle telescopes on Themis B and C spacecrafts. Preliminary understanding of the underlying physical processes using global-scale MHD simulations is discussed. |