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Faculté des Sciences
Faculté des Sciences
MASTER THESIS
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Development of a spectropolarimeter for space use

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Vasilescu, Bogdan ULiège
Promotor(s) : Loicq, Jerôme ULiège
Date of defense : 29-Jan-2019 • Permalink : http://hdl.handle.net/2268.2/6186
Details
Title : Development of a spectropolarimeter for space use
Author : Vasilescu, Bogdan ULiège
Date of defense  : 29-Jan-2019
Advisor(s) : Loicq, Jerôme ULiège
Committee's member(s) : Habraken, Serge ULiège
Grodent, Denis ULiège
Kintziger, Christian ULiège
Nazé, Yaël ULiège
Language : English
Number of pages : 146
Keywords : [fr] polarization
[fr] spectropolarimeter
[fr] birefringence
[fr] Zeeman effect
[fr] Hanle effect
[fr] polarization exoplanets
[fr] modulation
Discipline(s) : Physical, chemical, mathematical & earth Sciences > Space science, astronomy & astrophysics
Target public : Researchers
Professionals of domain
Student
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en sciences spatiales, à finalité spécialisée
Faculty: Master thesis of the Faculté des Sciences

Abstract

[fr] This thesis deals with the analytical design of a static spectropolarimeter for space use, based on birefringent media. It is about an instrument able to provide access to all four Stokes parameters of the detected light, at different wavelengths. In the first part of the thesis, the most important concepts and methods of polarimetry and of their applications in astrophysics are presented. Further, the proposed instrument is described, and the modulation function is derived, using the Mueller calculus. Because the material of the spectropolarimeter is Magnesium Fluoride (MgF2), an important attention was offered to the variation of the birefringence with wavelength. Two models for the description of the chromaticity of MgF2 were proposed and compared. Then the uncertainty calculus corresponding to this type of instrument was developed. Adjacently, considering the presence of noise, an extraction algorithm for the Stokes parameters was build and the behavior of the instrument in the presence of noise was tested. In the last part of the research, the off-axis case was also studied. After a detailed mathematical determination of the ray tracing with the help of Huygens constructions, several scenarios for the off-axis incidence were analyzed and the main limitations of the system were discovered.


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Author

  • Vasilescu, Bogdan ULiège Université de Liège > Master sc. spatiales, à fin.

Promotor(s)

Committee's member(s)

  • Habraken, Serge ULiège Université de Liège - ULiège > Département de physique > Optique - Hololab
    ORBi View his publications on ORBi
  • Grodent, Denis ULiège Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
    ORBi View his publications on ORBi
  • Kintziger, Christian ULiège Université de Liège - ULiège > CSL (Centre Spatial de Liège)
    ORBi View his publications on ORBi
  • Nazé, Yaël ULiège Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
    ORBi View his publications on ORBi
  • Total number of views 114
  • Total number of downloads 521










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