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Related Concept Videos

Magnetic Fields01:27

Magnetic Fields

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...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis. This...
Motion Of A Charged Particle In A Magnetic Field01:22

Motion Of A Charged Particle In A Magnetic Field

A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...
Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
Plane Electromagnetic Waves II01:29

Plane Electromagnetic Waves II

Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.

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Related Experiment Video

Updated: May 31, 2026

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
08:36

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation

Published on: November 3, 2016

Pattern formation in a complex plasma in high magnetic fields.

M Schwabe1, U Konopka, P Bandyopadhyay

  • 1Max-Planck-Institut für extraterrestrische Physik, D-85748 Garching, Germany. schwabe@mpe.mpg.de

Physical Review Letters
|June 25, 2011
PubMed
Summary
This summary is machine-generated.

Magnetic fields cause plasma filaments and patterns in neon, argon, krypton, and air. Ion magnetization explains these phenomena, influencing microparticle motion within the plasma.

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Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas
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Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas

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Last Updated: May 31, 2026

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
08:36

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Published on: November 3, 2016

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

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Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas
08:10

Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas

Published on: May 25, 2021

Area of Science:

  • Plasma physics
  • Magnetohydrodynamics
  • Condensed matter physics

Background:

  • Understanding plasma behavior in magnetic fields is crucial for fusion energy and astrophysics.
  • Low-pressure plasmas are widely used in industrial applications like semiconductor manufacturing.
  • The role of ion magnetization in complex plasma structures requires further investigation.

Purpose of the Study:

  • To investigate the influence of magnetic fields on low-pressure plasmas (neon, argon, krypton, air).
  • To explore the formation of plasma filaments and patterns under varying magnetic flux densities.
  • To analyze the collective behavior and motion of embedded microparticles within magnetized plasmas.

Main Methods:

  • Experimental study of low-pressure, room-temperature plasmas.
  • Application of magnetic fields up to 2.3 T.
  • Observation of plasma structures and microparticle dynamics using embedded microparticles as probes.

Main Results:

  • Observed plasma filaments aligned with magnetic field lines.
  • Identified spiral and concentric circle patterns perpendicular to the magnetic field.
  • Linked observed structures to the magnetization of ions.
  • Documented a transition in microparticle motion from collective rotation to vortex formation around filaments.

Conclusions:

  • Ion magnetization is a key factor in the formation of plasma filaments and patterns.
  • Microparticle behavior provides insights into plasma dynamics under magnetic fields.
  • The study reveals complex plasma self-organization influenced by magnetic forces.