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Wednesday, May 6, 2020 | History

4 edition of Effects of plasmaspheric ion heating due to ionospheric and magnetospheric sources found in the catalog.

Effects of plasmaspheric ion heating due to ionospheric and magnetospheric sources

Effects of plasmaspheric ion heating due to ionospheric and magnetospheric sources

final report, grant NAGW-1630, March 1989 - January 1996

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  • 37 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Plasmasphere,
  • Plasma density,
  • Magnetic variations,
  • Solar activity,
  • Ionospheric heating,
  • Hydrogen ions,
  • Helium ions

  • Edition Notes

    Statementby Richard H. Comfort ; submitted by The University of Alabama in Huntsville, Center for Space Plasma and Aeronomic Research, and College of Science.
    Series[NASA contractor report] -- NASA-CR-201021., NASA contractor report -- NASA CR-201021.
    ContributionsUniversity of Alabama in Huntsville. Center for Space Plasma and Aeronomic Research., University of Alabama in Huntsville. College of Science., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17837992M
    OCLC/WorldCa40333001

    The ionosphere (/ aɪ ˈ ɒ n ə ˌ s f ɪər /) is the ionized part of Earth's upper atmosphere, from about 60 km (37 mi) to 1, km ( mi) altitude, a region that includes the thermosphere and parts of the mesosphere and ionosphere is ionized by solar radiation. It plays an important role in atmospheric electricity and forms the inner edge of the magnetosphere. heating is accompanied by ion heating of about degrees and magnetic field-aligned measurements show ion outflows increasing with height up to m s 1 at km. The electron density decreases by up to 20%. When the radar antenna was scanned between three elevations from near field-aligned to vertical, the strongest heating effects.

    electromagnetic ion cyclotron waves (Khazanov et al., ) currently developing in NASA Marshall Space Flight Center. To study the effects of electromagnetic ion cyclotron wave propagation and refraction on the wave induced ring current precipitation and heating of the thermal plasmaspheric electrons, we simulate the May storm. The. Kinetic effects of cold plasma of ionospheric origin on magnetospheric EMIC waves smaller gyroradius than hot magnetospheric ions. Electromagnetic Ion Cyclotron (EMIC) waves occur in the outer magnetosphere, often in association with ionospheric ions, and serve as a coupling mechanism to the ionosphere and inner magnetosphere. Using the MMS.

    An ionospheric heater, or an ionospheric HF pump facility, is a powerful radio wave transmitter with an array of antennas which is used for research of plasma turbulence, the ionosphere and upper atmosphere. These transmitters operate in the high frequency (HF) range ( MHz) at which radio waves are reflected from the ionosphere back to the ground. The coupled magnetosphere – ionosphere – thermosphere models can be a good tool to investigate the IT dynamics and their impact on the magnetospheric phenomena. Additionally, strong Joule heating and enhanced ionospheric temperature can produce ion outflows and modulate the reconnection rates.


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Effects of plasmaspheric ion heating due to ionospheric and magnetospheric sources Download PDF EPUB FB2

Found that heating the ions through the thermal electrons, as done by photoelectrons, could not transfer sufficient energy to produce the observed ion temperatures, due to decreasing collisioaal coupling between thermal ions and electrons with increasing temperatures. Get this from a library.

Effects of plasmaspheric ion heating due to ionospheric and magnetospheric sources: final report, grant NAGW, March - January [Richard H Comfort; University of Alabama in Huntsville. Center for Space Plasma and Aeronomic Research.; University of Alabama in Huntsville.

College of Science.; United States. Effects of plasmaspheric ion heating due to ionospheric and magnetospheric sources. By Richard H. Comfort.

Abstract. In an initial study, the He(+) observations from the Retarding Ion Mass Spectrometer on Dynamics Explorer 1 (RIMS/DE 1) was examined for more than transits of the plasmasphere in the fall of The He(+) to H(+) ratio was Author: Richard H. Comfort. Three specific sources for large mass density will be examined (cf.

Figure 1): (1) the oxygen content of the dayside ion plasma sheet, (2) the plasmaspheric drainage plume, and (3) low‐energy ionospheric outflows that are seen across the dayside magnetosphere. For the latter two sources the mass densities are carried by cool ions: cool ions E Cited by: The synthesis shows that stormtime ionospheric outflows are superfluent in the cusp region with an upper flux limit of ions/m2-s.

O+ beams appear in the lobes before interplanetary shock impact, and they exhibit dawn-dusk and hemispherical asymmetries, also manifested in the : W. Lotko. For a numerical integration of the ionospheric plasma balance equations, upper and bottom boundary conditions were specified: the bottom conditions at km altitude in the form of a local photochemical equilibrium for ion densities, and of a loccal heat balance for determining the temperatures.

Ionospheric Effects of Parallel Plasma Dynamics Ionospheric Composition at High Latitudes Hydrodynamic Theory of the Polar Wind Ionospheric Effects of Perpendicular Plasma Dynamics The Role of Horizontal Transport Ion Heating Due to Collisions Velocity-Dependent Recombination Positive and Negative.

Lambour et al. () have modified the data-driven Air Force Magnetospheric Specification and Forecast Model (MSFM) by including the cold plasmaspheric ion population model of Carpenter and Anderson ().

They used this modified MSFM to examine the effect of ionospheric refilling on the cold plasmaspheric by: EMIC Wave and Coulomb Heating of Thermal Plasmaspheric Electrons [16] The EMIC waves generated by the RC ions not only cause the RC ion scattering into the loss cone but also effectively transfer energy to thermal plasmaspheric electrons due to resonant Landau damping.

The total energy deposition rate to the thermal electrons can be Cited by:   This research will also yield insight to the heating process, including locating ionospheric "hot-spots", yielding details of the electron collision process, elucidating the role of Langmuir and ion-acoustic waves in the strongly heated regions, and study of heating effects in Sporadic E.

The enhanced ion pressure in the high altitude part of magnetic field line due to the ion heating impedes the ionospheric inflow from both hemispheres toward the equator, giving rise to decreased transport of ionospheric ions into the equatorial region and thus increased density gradient along the magnetic field by:   Thus the shortwave pulses heat the ionospheric electrons and the powerful ULF/ELF component of the pulses shoots the electrons up into the magnetosphere at the same time.

There are several other ionospheric heaters like HAARP in operation around the world. Model for artificial ionospheric duct formation due to HF heating. Model for artificial ionospheric duct the natural and man-made radiation sources may have similar effects on processes in.

Ring current heating of the thermal electrons at solar maximum. a negative ionospheric storm effect near the F2 peak and below it, but a positive storm effect in the topside ionosphere. Ionospheric Composition at High Latitudes Hydrodynamic Theory of the Polar Wind Ionospheric Effects of Perpendicular Plasma Dynamics The Role of Horizontal Transport Ion Heating Due to Collisions Velocity-Dependent Recombination Positive and Negative Ionospheric Storms Abstract Title: Phase Relationship between ULF Waves and Drift-bounce Resonant Ions: A Statistical Study, Abstract Title: Modeling the Effect of a Plasmaspheric Drainage Plume on ULF Wave Power Accessibility and Radiation Belt Electron Energization in Earth's Magnetosphere., Abstract Title: Pitch angle “Boomerang.

The bulk ion flows constitute an important source of low-energy plasma for suprathermal ion outflows above the topside ionosphere, where transverse ion acceleration results in the generation of ion conics, and parallel electric field and magnetic folding contribute to the formation of ion Cited by:   Knowledge of the ion composition in the near-Earth’s magnetosphere and plasma sheet is essential for the understanding of magnetospheric processes and instabilities.

The presence of heavy ions of ionospheric origin in the magnetosphere, in particular oxygen (O+), influences the plasma sheet bulk properties, current sheet (CS) thickness and its structure. It affects reconnection rates and the Cited by: feedback effects due to local, diurnal, and seasonal variations in ionospheric parameters, and of the importance of spatial boundaries as sources and/or transmitters of plasma waves.

Second, such studies can provide diagnostics of dynamic and static features within the Earth's plasma environment. Overview. Research conducted by the ionospheric modifications (IM) community—a community that uses high-frequency (HF) transmitters to inject energy in the ionosphere and measure its effects using ground-and space-based diagnostics—is focused on understanding the interaction of radio waves with the ionospheric plasma, the local consequences of heating in the ionosphere, and studies of.

the effects of electromagnetic ion cyclotron wave propagation and refraction on the of the RC to the ionosphere is the lack of concurrent and conjugate magnetospheric and ionospheric plasma measurements over complete anomalous heating events.

plasmaspheric electrons from two energy sources; the EMIC wave energy absorption due to Landau File Size: 2MB. Plasmaspheric Models GCPM Version Meridian Swing To learn more about the images above, click the images. "Below is at least a partial list of current plasmaspheric models.

These specific models have been recognized in the academic community, but there are still many other plasmaspheric models.Ionospheric effects on GNSS Positioning. Ionospheric Signal Delay. The ionosphere is a part of the earth’s atmosphere, which extends from approximately 50 – km in altitude.

The sun's ultraviolet and x-ray emissions are primarily responsible for causing ionization in the ionosphere.