Professor of Physics at
the Departments of Astronomy and Physics
holds a joint appointment at the Departments of Physics and Astronomy in University
of Maryland, College Park. During the period 1969-1979 he served as senior
scientist and division consultant at the Plasma Physics Division of the Naval
Many of his major research accomplishments are related to directing
interdisciplinary, critical mass efforts that included state of the art
computing to address space physics issues. During 1969 to 1979, while at NRL he
originated the concept of multifluid codes with self-consistent anomalous
transport. These codes provided the capability to simulate the ionospheric
effects of high altitude nuclear weapon explosions. Between 1980-1986 as P.I. of
NASA's STTP program, he directed the University of Maryland effort that using
"hybrid codes" resolved the key physics issues of the earth's collisionless
shock and of high Mach number shocks in general. During the period 1990-2003, he
was the P.I. for theory and modeling in the ISTP mission, a mission that
involved more than 12 satellites. He was instrumental in conceiving and
promoting the HAARP ionospheric heating facility located in Alaska. The facility
was completed in 2003 and received DARPA award as the most innovative project of
the year. He is currently P.I. of the Multi-University Research Initiative on
the "Fundamental Physics Issues on Radiation Belt Dynamics and Remediation", a $
7.5 M program that involves theory and modeling, laboratory and space
In his personal research he has
- Predicted the existence of spontaneous magnetic
fields in laser produced plasmas.
- Introduced strong turbulence theory in beam
plasma interactions, which resolved the long puzzle of type III solar radio
burst propagation and emission.
- Invented in 1974 the concept of generation of
ELF/VLF waves by using the nonlinear interaction of HF heaters with the
ionosphere [owns patent of the effect].
- Developed models of anomalous transport and
anomalous resistivity in the ionosphere.
- Introduced major computer simulations in the
space community which led to the resolution of the physics of collisionless
high Mach number shocks.
- Developed modern theories of Alfven's critical
ionization velocity phenomena.
- Developed new switching concepts using magnetized