Abhay K. Ram

Principal Research Scientist

617-253-8501

NW16-260

Biography

Education

University of Nairobi, Kenya, B.S., Mathematics (1971)
Massachusetts Institute of Technology, Ph.D., Physics (1977)

Expertise

Theoretical: electromagnetic wave propagation; wave scattering; nonlinear dynamics; wave-particle interactions in plasmas.

Research

Magnetic Fusion: Heating, current drive, and transport induced by radio frequency waves (ion cyclotron, lower hybrid, and electron cyclotron) in toroidal fusion devices. Scattering of radio frequency waves by plasma fluctuations. Propagation and damping of electromagnetic waves in plasmas. Parametric wave processes in the plasma edge.

Inertial Confinement Fusion: Laser-plasma interactions, nonlinear evolution of plasma waves, wave-particle interactions.

Space and Astrophysical Plasmas: Diffusion of magnetic field lines and charged particles in three-dimensional force-free magnetic fields, transport of particles in chaotic magnetic fields, nonlinear acceleration of ionospheric ions by waves, and propagation of waves in density cavities.

Nonlinear Plasma Physics: Coherent and chaotic dynamics of charged particles induced by electromagnetic waves, characterization of particle diffusion and the evolution of particle distribution function.

Publications

Abhay K. Ram, Brahmananda Dasgupta, V. Krishnamurthy, and Dhrubaditya Mitra, “Anomalous diffusion of field lines and charged particles in Arnold-Beltrami-Childress force-free magnetic fields,” Physics of Plasmas 21, 072309 (2014).

Dhrubaditya Mitra, Axel Brandenburg, Brahmananda Dasgupta, Eyvind Niklasson, and Abhay Ram, “Particle energization through time-periodic helical magnetic fields,” Physical Review E 89, 042919 (2014).

Abhay K. Ram and Kyriakos Hizanidis, “Scattering of electromagnetic waves by a plasma sphere embedded in a magnetized plasma,” Radiation Effects and Defects in Solids: Incorporating Plasma Science and Plasma Technology 168, 759 (2013).

Abhay K. Ram, Kyriakos Hizanidis, and Yannis Kominis, “Scattering of radio frequency waves by blobs in tokamak plasmas,” Physics of Plasmas 20, 056110 (2013).

P. A. Zestanakis, Y. Kominis, K. Hizanidis, and A. K. Ram, “Heating of ions by high frequency electromagnetic waves in magnetized plasmas,” Physics of Plasmas 20, 072507 (2013).

Abhay K. Ram and Brahmananda Dasgupta, “Dynamics of charged particles in spatially chaotic magnetic fields,” Physics of Plasmas 17, 122104 (2010).

Y. Kominis, A. K. Ram, and K. Hizanidis, “Kinetic Theory for Distribution Functions of Wave-Particle Interactions in Plasmas,” Physical Review Letters 104, 235001 (2010).

Teaching

Introduction to Plasma Physics – 22.611J (Fall 2012)

Talks & Media

“Scattering of radio frequency waves by plasma blobs,” Magneto-fluid Dynamics Seminar, New York University, New York (November 18, 2014).

“Scattering of ECRF waves by edge density fluctuations and blobs,” 18th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, Nara, Japan (April 22, 2014).

“Scattering of waves by blobs in tokamak plasmas: venturing beyond geometric optics,” invited talk 54th Annual Meeting of the APS Division of Plasma Physics, Providence, Rhode Island (October 30, 2012).

“Scattering of ECRF waves by edge density blobs and fluctuations in tokamak plasmas,” 17th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, Deurne, Netherlands (May 7, 2012).

“Dancing with the Stars – Fusion Energy”, seminar at the Knight Science Journalism at MIT (April 1, 2010).