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A member of the University of Texas System, UT Dallas is a public research university with 125 academic programs offered through its seven schools. Many of the university's strongest and most popular programs are in business, the sciences, and applied sciences. UTD's admissions standards are among ...
An area in the high latitude ionosphere where the magnetic field lines are connected to the interplanetary magnetic field.
Industry:Physics
The energy required to ionize an atom or molecule. The energy is usually given in terms of electron volts.
Industry:Physics
The magnetic cavity surrounding the earth, carved out of the passing solar wind by virtue of the geomagnetic field, which prevents, or at least impedes, the direct entry of the solar wind plasma into the cavity.
Industry:Physics
Infrared radiation emitted by or being propagated through the atmosphere.
Industry:Physics
The observed decreases in cosmic ray activity in the earth's atmosphere about a day after a solar flare.
Industry:Physics
Typical time which passes between two consecutive collision events for a given particle. Inverse of the collision frequency; equal to the mean free path divided by the particle's velocity. In plasmas, the (Coulomb) collision time decreases with increasing density, and increases with increasing temperature.
Industry:Physics
The aurora seen near the equatorward edge of the auroral oval and most of the daytime aurora is known as the diffuse aurora. It is caused by the precipitation of particles with a relatively broad spectrum of energies (eg. 100 eV to 100 keV). Since the diffuse aurora mirrors the hot plasma sheet, it is also characterised by the same flow pattern, which is roughly zonally westward before midnight and zonally eastward after midnight. Most of the energy results in strong ionization in the E-region, creating a broad shelf in the electron density profile. But the low energy particles also enhance the F-region density.
Industry:Physics
Nightside plasma depletion that can exceed and order of magnitude. Occurs on flux tubes which flow west at the same speed as the earth rotates. Plasma loss due to recombination is responsible for the observed depletion.
Industry:Physics
In plasma physics, the loss of (electromagnetic) energy to a medium. For instance, an electromagnetic wave which propagates through a plasma will set the electrons into motion. If the electrons make collisions with other particles, they will absorb net energy from the wave.
Industry:Physics
