RESEARCH
From Large-Scale to Kinetic-Scale Processes in Space Plasma
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Research Overview
Research Overview
My research focuses on understanding the multiscale dynamics of collisionless and weakly collisional plasmas, particularly plasma turbulence, coherent magnetic structures, plasma waves, wave–particle interactions, temperature anisotropy, and kinetic instabilities. I investigate how these processes influence energy transfer, dissipation, particle heating, and the evolution of heliospheric and magnetospheric plasma environments.
My research focuses on understanding the multiscale dynamics of collisionless and weakly collisional plasmas, particularly plasma turbulence, coherent magnetic structures, plasma waves, wave–particle interactions, temperature anisotropy, and kinetic instabilities. I investigate how these processes influence energy transfer, dissipation, particle heating, and the evolution of heliospheric and magnetospheric plasma environments.
My work combines high-resolution in situ observations from MMS, Parker Solar Probe, Solar Orbiter, Wind, and ACE with ground-based cosmic-ray measurements to study plasma processes across fluid and kinetic scales and their connections to larger-scale heliospheric structures.
My work combines high-resolution in situ observations from MMS, Parker Solar Probe, Solar Orbiter, Wind, and ACE with ground-based cosmic-ray measurements to study plasma processes across fluid and kinetic scales and their connections to larger-scale heliospheric structures.
Research Areas
Plasma Turbulence & Coherent Structures
Multiscale turbulence, intermittency, current sheets, magnetic holes, and reconnection in space plasma.
Plasma Waves & Kinetic Processes
Plasma waves, wave–particle interactions, temperature anisotropy, kinetic instabilities, and particle heating.
Heliospheric Structures & Space Weather
ICMEs, corotating interaction regions, interplanetary shocks, and solar–terrestrial interactions.
Cosmic-Ray Modulation
Forbush decreases, galactic cosmic-ray variations, and the effects of interplanetary magnetic structures.
Selected Research Highlights
Solar-wind turbulence and current sheets at 1 au
Solar-wind turbulence and current sheets at 1 au
Scaling of current sheet properties with plasma beta, turbulent amplitude, and critical scale.
Shaikh et al. (2026), ApJL; Shaikh et al. (2026), POP
Electrostatic waves in the Earth's magnetosheath
Electrostatic waves in the Earth's magnetosheath
Observation of electron holes, ion holes, and slow electron holes using MMS.
Shaikh et al. (2024), JGR; Shaikh & Ivan (2025), GRL
ICME-induced geomagnetic storm
ICME-induced geomagnetic storm
Investigated the cause of fast and late recovery in geomagnetic storms caused by ICME.
Shaikh et al. (2019a), MNRAS; Shaikh et al. (2019b), MNRAS
Cosmic ray modulation by ICMEs
Cosmic ray modulation by ICMEs
Response of galactic cosmic rays to interplanetary structures.
Shaikh et al. (2017), ApJ; Shaikh et al. (2018), ApJ
Current and Future Research Directions
My ongoing research focuses on the multiscale dynamics of space plasmas, particularly turbulence, coherent magnetic structures, plasma waves, wave-particle interactions, and kinetic processes. Using observations from MMS, Parker Solar Probe, Solar Orbiter, and Wind, I investigate energy transfer, particle heating, and the connections between fluid- and kinetic-scale plasma dynamics, alongside broader studies of heliospheric structures and cosmic-ray modulation.
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