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Related Concept Videos

Magnetic Fields01:27

Magnetic Fields

7.6K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
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Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

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An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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Motional Emf01:22

Motional Emf

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Magnetic flux depends on three factors: the strength of the magnetic field, the area through which the field lines pass, and the field's orientation with respect to the surface area. If any of these quantities vary, a corresponding variation in magnetic flux occurs. If the area through which the magnetic field lines are passing changes, then the magnetic flux also changes. This change in the area can be of two types: the flux through the rectangular loop increases as it moves into the...
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Precipitation of Ions03:11

Precipitation of Ions

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Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
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Magnetic Field Lines01:19

Magnetic Field Lines

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The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
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Applications of EMF Measurements01:26

Applications of EMF Measurements

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Electromotive force (EMF) measurements have a broad range of applications in various fields, including chemistry and physics. The electrochemical series, an arrangement of elements in order of their standard electrode potentials, can be determined through EMF measurements. Elements with lower standard potentials can reduce ions of elements with higher standard potentials.The standard cell potential, E°, allows for the calculation of the standard reaction Gibbs energy, ΔG°, and...
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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

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Database of ion temperature maps during geomagnetic storms.

Amy M Keesee1, Earl E Scime1

  • 1Department of Physics and Astronomy West Virginia University Morgantown West Virginia USA.

Earth and Space Science (Hoboken, N.J.)
|December 17, 2016
PubMed
Summary

Researchers mapped energetic neutral atom data to calculate ion temperatures during geomagnetic storms. These findings aid in understanding ion dynamics and modeling the Earth

Keywords:
energetic neutral atom imaginggeomagnetic stormion temperaturemagnetosphereplasma sheet

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Area of Science:

  • Space Physics
  • Plasma Physics
  • Geophysics

Background:

  • Geomagnetic storms significantly impact Earth's magnetosphere.
  • Understanding ion behavior is crucial for space weather prediction.
  • Previous studies lacked comprehensive ion temperature data in the inner magnetosphere.

Purpose of the Study:

  • To provide ion temperature data for 76 geomagnetic storms.
  • To map ion temperatures in the geocentric solar magnetospheric (GSM) equatorial plane.
  • To support research on ion dynamics and magnetospheric modeling.

Main Methods:

  • Utilized energetic neutral atom data from the Two Wide-angle Imaging Spectrometers (TWINS) mission.
  • Developed a method to map TWINS data to the GSM equatorial plane.
  • Calculated ion temperatures from the mapped data for the 1-40 keV energy range.

Main Results:

  • Generated a dataset of ion temperatures as a function of spatial coordinates (x, y in GSM) and time.
  • Data covers 76 geomagnetic storms from July 2008 to December 2013.
  • Ion temperatures represent the average thermal energy of the bulk ion population.

Conclusions:

  • The ion temperature dataset is valuable for studying ion dynamics.
  • Enables placing in situ measurements within a global magnetospheric context.
  • Provides essential boundary conditions for inner magnetosphere and plasma sheet models.