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Pitch angle distribution of low earth emitted energetic neutral atoms
2004 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This MSc diploma project comprises a study of Energetic Neutral Atoms (ENAs) emitted from a region in the close vicinity of the Earth. ENA imagers onboard spacecrafts circling the Earth detect high intensity fluxes from the close vicinity of the Earth. These ENAs are generated by energetic ions precipitating into the thicker exosphere/upper atmosphere, where they undergo charge exchange collisions, and to some extent are re-emitted out into space as ENAs. This study of low-Earth ENA emission is performed in order to find a relationship between the pitch angle of emitted ENAs and the intensity of the flux. It uses the data collected by the Medium Energetic Neutral Atom (MENA) imager and the High Energetic Neutral Atom (HENA) imager onboard the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) spacecraft, together with the auxiliary data from the spacecraft itself. It will be shown that the high intensity low altitude ENA emission appears to maximize at pitch angles well away from the mirroring pitch angle of 90º.

Place, publisher, year, edition, pages
2004.
Keyword [en]
Physics Chemistry Maths
Keyword [sv]
Fysik, Kemi, Matematik
Identifiers
URN: urn:nbn:se:ltu:diva-45394ISRN: LTU-EX--04/301--SELocal ID: 315eb80f-c4eb-4f1c-bcfd-bf42c94f5f41OAI: oai:DiVA.org:ltu-45394DiVA: diva2:1018684
Subject / course
Student thesis, at least 30 credits
Educational program
Space Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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