Download or read book Particle in cell Simulations of Particle Energization in the Auroral Region written by Kaijun Liu and published by . This book was released on 2007 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fast Polar Conjunction Study of Field Aligned Auroral Acceleration and Corresponding Magnetotail Drivers written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-31 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discrete aurora results when energized electrons bombard the Earth's atmosphere at high latitudes. This paper examines the physical processes that can cause field-aligned acceleration of plasma particles in the auroral region. A data and theoretical study has been carried out to examine the acceleration mechanisms that operate in the auroral zone and to identity the magnetospheric drivers of these acceleration mechanisms. The observations used in the study were collected by the Fast Auroral SnapshoT (FAST) and Polar satellites when the two satellites were in approximate magnetic conjunction in the auroral region. During these events FAST was in the middle of the auroral zone and Polar was above the auroral zone in the near-Earth plasma sheet. Polar data was used to determine the conditions in the magnetotail at the time field-aligned acceleration was measured by FAST in the auroral zone. For each of the magnetotail drivers identified in the data study, the physics of field-aligned acceleration in the auroral region was examined using existing theoretical efforts and a long-system particle-in-cell simulation to model the magnetically connected region between the two satellites.Schriver, D. and Ashour-Abdalla, M. and Strangeway, R. J. and Richard, R. L. and Klezting, C. and Dotan, Y. and Wygant, J.Goddard Space Flight CenterAURORAL ZONES; POLAR REGIONS; ELECTRON ACCELERATION; PLASMA ACCELERATORS; ELECTRIC FIELDS; SATELLITE OBSERVATION; COMPUTERIZED SIMULATION; MAGNETOHYDRODYNAMIC WAVES
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Self Consistent Particle and Parallel Electrostatic Field Distributions in the Magnetospheric Ionospheric Auroral Region written by Yam T. Chiu and published by . This book was released on 1977 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: The variation of the self-consistent electrostatic potential along the magnetic field is calculated by application of the principle of quasi-neutrality to the plasma components distributed along an auroral field line. The equilibrium plasma consists of hot anisotropic magnetospheric plasma, ionospheric plasma evaporated or extracted upwards by the parallel electrostatic field, and back scattered electrons. It is shown that the above charged-particle populations can support a potential difference of up to several kilovolts between the equator and the ionosphere along an auroral field line. Moreover, the corresponding parallel electric field has the proper signature to account for electron precipitation characteristics. Comparisons between theoretical and observed electron precipitation fluxes lead to estimates for the various physical parameters in the model. (Author).
Download or read book Electron Acceleration in the Aurora and Beyond written by D Bryant and published by CRC Press. This book was released on 1998-10-01 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: How did electrons in the high atmosphere and space around the Earth come to acquire their speeds and energies? This intriguing question lies at the heart of understanding how high-energy electrons create the spectacular displays of the ^IAurora Borealis and ^IAurora Australis. Electron Acceleration in the Aurora and Beyond explores the mysteries
Download or read book Auroral Particle Distribution Functions and Their Relationships to Inverted Vs and Auroral Arcs written by J. F. Fennell and published by . This book was released on 1982 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Utilizing data from three satellites the document presents the relationship between the particle energy and angular distributions, the resulting auroral forms, and spatial features such as the inverted V and electrostatic structures. The occurrence of field-aligned electrons over a wide range of energies near and at the edges of inverted V structures in the low altitude local evening auroral region is an outstanding feature in the data. The DMSP pictures often show a brightening of the auroral form in coincidence with similar intense electron precipitation at the edges of inverted V structures. Preliminary examination of the S3-3 data has produced only a few such events with a tendency for them to occur at lower altitudes. As a separate topic, a detailed description of a high altitude inverted V structure is presented using S3-3 data. The region contained strong perpendicular electric field structures embedded therein. The potential drop in the region peaks near 16 kV with 10-12 kV below and 4-6 kV above 8000 km. The modification of the electron distributions due to strong electric field structures is analyzed. The signature of the acceleration in the electrons is consistent with an acceleration region that starts 2000-4000 km above the satellite altitude of 8000 km and extends well below the satellite. (Author).
Download or read book Potential Structures and Particle Acceleration on Auroral Field Lines written by David J. Gorney and published by . This book was released on 1985 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the 1970's major advances in the understanding of auroral processes were brought about by observations of plasmas and electric fields within the regions of space responsible for auroral particle acceleration. The major contribution of these observations was the verification of the existence of electric fields with components parallel to the magnetic field over large regions of altitude (1000-20000 kilometers). These electric fields constitute potential drops of several kilovolts, accelerating magnetospheric electrons downward to form the aurora and ionospheric ions upward, where they contribute significantly to the magnetospheric hot ion population. Perpendicular spatial scales of about 100 kilometers are most common, although finer scales have been observed embedded, and individual small amplitude double layers occur on much smaller parallel spatial scales. More recently, the same data sets have revealed the existence of about 100 V electric potential drops directed downward in return current regions. Downward electric fields are in a direction to accelerate electrons out of the ionsphere and tend to retard the propagation of ions upward. An association between upflowing electron beams and transversely heated ions at low altitude has been noted, and a casual relationship between downward electric fields and ion conics is suggested.
Download or read book Geomagnetism Aeronomy and Space Weather written by Mioara Mandea and published by Cambridge University Press. This book was released on 2019-11-14 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: An interdisciplinary review of research in geomagnetism, aeronomy and space weather, written by eminent researchers from these fields.
Download or read book Space Modeling and Simulation written by Larry B. Rainey and published by AIAA. This book was released on 2004 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was sponsored by the U.S. Air Force Academy Space Mission Analysis and Design Program with support from program offices at the Air Force Space and Missile Systems Center, the National Reconnaissance Office, the U.S. Department of Transportation, and organizations within the National Aeronautics and Space Administration.
Download or read book Observations of Charged Particle Precipitation Into the Auroral Zone written by Louis A. Frank and published by . This book was released on 1970 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cross Scale Coupling and Energy Transfer in the Magnetosphere Ionosphere Thermosphere System written by Yukitoshi Nishimura and published by Elsevier. This book was released on 2021-12-07 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cross-Scale Coupling and Energy Transfer in the Magnetosphere-Ionosphere-Thermosphere System provides a systematic understanding of Magnetosphere-Ionosphere-Thermosphere dynamics. Cross-scale coupling has become increasingly important in the Space Physics community. Although large-scale processes can specify the averaged state of the system reasonably well, they cannot accurately describe localized and rapidly varying structures in space in actual events. Such localized and variable structures can be as intense as the large-scale features. This book covers observations on quantifying coupling and energetics and simulation on evaluating impacts of cross-scale processes. It includes an in-depth review and summary of the current status of multi-scale coupling processes, fundamental physics, and concise illustrations and plots that are usable in tutorial presentations and classrooms. Organized by physical quantities in the system, Cross-Scale Coupling and Energy Transfer in the Magnetosphere-Ionosphere-Thermosphere System reviews recent advances in cross-scale coupling and energy transfer processes, making it an important resource for space physicists and researchers working on the magnetosphere, ionosphere, and thermosphere. Describes frontier science and major science around M-I-T coupling, allowing for foundational understanding of this emerging field in space physics Reviews recent and key findings in the cutting-edge of the science Discusses open questions and pathways for understanding how the field is evolving
Download or read book Space Weather Fundamentals written by George V. Khazanov and published by CRC Press. This book was released on 2016-11-17 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space weather is one of the most significant natural hazards to human life and health. Conditions of the sun and in the solar wind, magnetosphere, ionosphere, and thermosphere can influence the performance and reliability of space-borne and ground-based technological systems. If conditions in the space environment are adverse, they can cause disruption of satellite operations, communications, navigation, and electric power distribution grids, leading to a variety of socioeconomic losses. This book provides an overview of our current knowledge and theoretical understanding of space weather formation and covers all major topics of this phenomena, from the sun to the Earth’s ionosphere and thermosphere, thus providing a fully updated review of this rapidly advancing field. The book brings together an outstanding team of internationally recognised contributors to cover topics such as solar wind, the earth's magnetic field, radiation belts, the aurora, spacecraft charging, orbital drag and GPS.
Download or read book Particle Acceleration in Astrophysical Plasmas written by Dennis Gallagher and published by American Geophysical Union. This book was released on 2005-01-14 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an integrated review of basic theory and new developments in experimental and theoretical particle acceleration physics, from lowest to highest energies, in their distinct environments and as those environments relate.
Download or read book Particle in cell Simulations of Intense Charged Particle Beam Transport written by David Vincent Rose and published by . This book was released on 1997 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle in cell Simulations of the Lunar Wake written by Paul C. Birch and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ionospheres written by Robert Schunk and published by Cambridge University Press. This book was released on 2009-08-20 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the physical, plasma and chemical processes controlling ionospheres, upper atmospheres and exospheres, for researchers and graduates.
Download or read book Particle in Cell Simulations of Disruption written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An improved numerical particle simulation code has been developed to study the electrodynamical interaction of colliding electron and positron beams. Contrary to previously reported work (which was in error due to a coding mistake), it is found that the maximum enhancement in luminosity due to the mutual pinch effect can exceed a factor of 6 for beams with Gaussian radial profiles and approaches 5 for uniform profiles. These new results are in much better agreement with those originally found by R. Hollebeek.
