54 citations · 294 across the 16 of their papers we have counts for
16 papers
Spectral Properties of Solar Wind Charge Exchange from Earth's Magnetospheric Boundaries: MHD and Test Particle Simulations
A. Ramachandran, R. T. Desai, H. L. Norman +6
The Solar Wind Charge Exchange (SWCX) mechanism, where X-rays can be generated through interactions between heavy, highly charged solar wind ions and neutral atoms, offers an oppor…
Simulating secondary electron and ion emission from the Cassini spacecraft in Saturn's ionosphere
Zeqi Zhang, Ravindra T. Desai, Oleg Shebanits +3
The Cassini spacecraft's Grand Finale flybys through Saturn's ionosphere provided unprecedented insight into the composition and dynamics of the gas giant's upper atmosphere and a…
Successive interacting coronal mass ejections: How to create a perfect storm?
Gordon J. Koehn, Ravindra T. Desai, Emma E. Davies +3
Coronal mass ejections (CMEs) are the largest type of eruptions on the Sun and the main driver of severe space weather at the Earth. In this study, we implement a force-free sphero…
Galactic Cosmic Rays and Solar Energetic Particles in Cis-Lunar Space: Need for contextual energetic particle measurements at Earth and supporting distributed observations
Claudio Corti, Kathryn Whitman, Ravindra Desai +5
The particle and radiation environment in cis-lunar space is becoming increasingly important as more hardware and human assets occupy various orbits around the Earth and space expl…
Time-Varying Magnetopause Reconnection during Sudden Commencement: Global MHD Simulations
J. W. B. Eggington, R. T. Desai, L. Mejnertsen +2
In response to a solar wind dynamic pressure enhancement, the compression of the magnetosphere generates strong ionospheric signatures and a sharp variation in the ground magnetic…
Drift Orbit Bifurcations and Cross-field Transport in the Outer Radiation Belt: Global MHD and Integrated Test-Particle Simulations
R. T. Desai, J. P. Eastwood, R. B. Horne +10
Energetic particle fluxes in the outer magnetosphere present a significant challenge to modelling efforts as they can vary by orders of magnitude in response to solar wind driving…
Interplanetary Shock-induced Magnetopause Motion: Comparison between Theory and Global Magnetohydrodynamic Simulations
Ravindra T. Desai, Mervyn P. Freeman, Jonathan P. Eastwood +10
The magnetopause marks the outer edge of the Earth's magnetosphere and a distinct boundary between solar wind and magnetospheric plasma populations. In this letter, we use global m…
Photodetachment and Test-Particle Simulation Constraints on Negative Ions in Solar System Plasmas
Ravindra T. Desai, Zeqi Zhang, Xinni Wu +1
Negative ions have been detected in abundance in recent years by spacecraft across the solar system. These detections were, however, made by instruments not designed for this purpo…
Particle-In-Cell Simulations of the Cassini Spacecraft's Interaction with Saturn's Ionosphere during the Grand Finale
Zeqi Zhang, Ravindra T. Desai, Yohei Miyake +2
A surprising and unexpected phenomenon observed during Cassini's Grand Finale was the spacecraft charging to positive potentials in Saturn's ionosphere. Here, the ionospheric plasm…
Three Dimensional Simulations of Solar Wind Preconditioning and the 23 July 2012 Interplanetary Coronal Mass Ejection
Ravindra T. Desai, Han Zhang, Emma E. Davies +3
Predicting the large-scale eruptions from the solar corona and their propagation through interplanetary space remains an outstanding challenge in solar- and helio-physics research.…
Spatial variations of low mass negative ions in Titan's upper atmosphere
Teodora Mihailescu, Ravindra Desai, Oleg Shebanits +5
Observations with Cassini's Electron Spectrometer discovered negative ions in Titan's ionosphere, at altitudes between 1400 and 950 km. Within the broad mass distribution extending…
Nitrogen-containing Anions and Tholin Growth in Titan's Ionosphere: Implications for Cassini CAPS-ELS Observations
David Dubois, Nathalie Carrasco, Jérémy Bourgalais +4
The Cassini Plasma Spectrometer (CAPS) Electron Spectrometer (ELS) instrument onboard Cassini revealed an unexpected abundance of negative ions above 950 km in Titan's ionosphere.…
Solar System Ice Giants: Exoplanets in our Backyard
Abigail Rymer, Kathleen Mandt, Dana Hurley +110
Future remote sensing of exoplanets will be enhanced by a thorough investigation of our solar system Ice Giants (Neptune-size planets). What can the configuration of the magnetic f…
Hybrid Simulations of Positively and Negatively Charged Pickup Ions and Cyclotron Wave Generation at Europa
R. T. Desai, M. M. Cowee, H. Wei +4
In the vicinity of Europa, Galileo observed bursty Alfvén-cyclotron wave power at the gyrofrequencies of a number of species including K, O, Na, and Cl, indicatin…
Cassini CAPS identification of pickup ion compositions at Rhea
R. T. Desai, S. A. Taylor, L. H. Regoli +9
Saturn's largest icy moon, Rhea, hosts a tenuous surface-sputtered exosphere composed primarily of molecular oxygen and carbon dioxide. In this Letter, we examine Cassini Plasma Sp…
Carbon chain anions and the growth of complex organic molecules in Titan's ionosphere
R. T. Desai, A. J. Coates, A. Wellbrock +12
Cassini discovered a plethora of neutral and ionised molecules in Titan's ionosphere including, surprisingly, anions and negatively charged molecules extending up to 13,800 u/q. In…