NDLI: Energetic neutral atoms: imaging the magnetospheric ring current

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Energetic neutral atoms: imaging the magnetospheric ring current

Content Provider	NASA Technical Reports Server (NTRS)
Author	Roelof, Edmond C.
Copyright Year	1990
Description	Magnetospheric imaging is a new discipline whose goal is to make pictures of the energetic particle populations trapped in the magnetic field of Earth (or any other planet). This project demonstrated the technical feasibility and scientific validity of magnetospheric imaging using energetic neutral atoms (ENA) with the publication and quantitative analysis of the first ENA images ever obtained from space. ENA's are produced when singly-charged energetic (approximately 100 keV) trapped ions make an atomic collision with the neutral hydrogen atoms which boil of the top of the Earth's atmosphere. These hydrogen atoms suffuse the entire trapping volume of the magnetosphere. The energetic ion steals the electron from the atmospheric hydrogen, so the energetic ion is transformed into an energetic neutral atom with a velocity of several thousands of kilometers/second. Moreover, the new-born ENA preserves the velocity that the trapped ion had at the time of the collision. Consequently, any population of energetic ions emits ENA's.
File Size	221011
Page Count	5
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940009353
Archival Resource Key	ark:/13960/t8jd9s298
Language	English
Publisher Date	1990-01-01
Access Restriction	Open
Subject Keyword	Geophysics Geomagnetism Hydrogen Imaging Techniques Ions Ring Currents Ionic Collisions Neutral Atoms Atomic Collisions Energetic Particles Earth Magnetosphere Trapped Particles Hydrogen Ions Collisions Hydrogen Atoms Magnetic Fields Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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