Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Development of a model for ionospheric instabilities in the equatorial region
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.
2023 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Développement d'un modèle simple d'instabilités ionosphériques équatoriales (French)
Abstract [en]

This work is part of a bigger project on analyzing the ionospheric dynamics in the equatorial region using simulations. The main objective of this study is to determine and characterize the parameters needed to trigger instabilities and thus the formation of plasma bubbles. An ambition is to keep the calculations as complete as possible by not oversimplifying the process itself as a classic Rayleigh-Taylor instability and by introducing the more realistic Generalized Eccentric Dipole description of the magnetic field. In this way, we aspire to avoid the neglect of convoluted interactions in the ionospheric system as well as the distorted nature of the geomagnetic field. After an in-depth study of the existing literature and getting to know the data generated by IPIM, I derived the equations describing the relevant physical processes based on fundamental plasma physics. In a MATLAB environment, I proceeded to develop the necessary tools for a computation of the quantities needed in the equations to then assemble and interpret the results for a simple study case. The found growth rate values are high enough and thus the characteristic time for the occurrence of instabilities short enough for them to be the principal process in the examined time and altitude range. It has been verified that the computed growth rate is such that instabilities may occur with a higher probability in the Southern Hemisphere due to the elevated amplitudes and the time delay between the foot points. We managed to derive a complete description of the equatorial ionosphere without using unreasonable approximations and the simplicity of the chosen configuration did not hinder the successful computation of instability seeds. The preparations that I undertook during this internship are an important first step for the subsequent development of the ionospheric model.

Place, publisher, year, edition, pages
2023.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:ltu:diva-98633OAI: oai:DiVA.org:ltu-98633DiVA, id: diva2:1771048
External cooperation
Institut de Recherche en Astrophysique et Planétologie
Subject / course
Student thesis, at least 30 credits
Educational program
Space Engineering, master's level (120 credits)
Supervisors
Examiners
Available from: 2023-06-22 Created: 2023-06-20 Last updated: 2023-06-22Bibliographically approved

Open Access in DiVA

fulltext(5015 kB)87 downloads
File information
File name FULLTEXT02.pdfFile size 5015 kBChecksum SHA-512
389774e2fc19b9fb238eb9da0c7dc59d0fb13e046a21a784121a5b7b5da138c0808fd486e04b55f2dc8e0783f8db788b8b67dec22c49aa05a4b64ff1806fef8d
Type fulltextMimetype application/pdf

By organisation
Space Technology
Fusion, Plasma and Space Physics

Search outside of DiVA

GoogleGoogle Scholar
Total: 87 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 83 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf