Doctorate in Applied and Engineering Physics  

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Thesis Proposal for the

Doctorate Program in Applied and Engineering Physics (DAEPHYS)

Starting in the Academic Year 2016/2017


Proposal 018


Title:The METIS imaging-spectrometer for the ESO Extremely Large Telescope
 
Objectives (recommended length: 2000-3000 char):
The E-ELT (European Extremely Large Telescope) METIS instrument focuses on the highest angular resolution and very high spectral resolution in the thermal infrared region of the electromagnetic spectrum. It will provide diffraction limited imaging and coronagraphy from 3-14 microns over an 20 arcsec x 20 arcsec field of view, as well as integral field spectroscopy at spectral resolution of R~100,000 from 2.9 to 5.3 microns. In addition, METIS provides medium-resolution (R ~ 5000) long slit spectroscopy, and polarimetric measurements at N band (~10 microns).
The instrument capacity above described follows top level specifications which include a primary objectives studies of circumstellar disks and the formation of planets, exoplanet detection and characterization, Solar system formation, massive stars and clusters, and star formation in external galaxies.
The instrument is divided in several sub-systems, including the single conjugate adaptive optics, imagers, spectrographs, coronographs, which are at cryogenic temperatures. As well as other subsystems at warmer temperatures and non-physical subsystems as data reductions and pipelines.

The primary objective of the PhD thesis is the design and prototyping of the pupil imagers of the METIS imaging spectrometer. The E-ELT telescope design is very sophisticated with a segmented primary mirror and several secondary mirrors up to the instrument. Furthermore the METIS instrument implements a high Strehl single conjugate adaptive optics which will be coupled to the coronograph for exoplanet searches. These modes are very demanding and require a very accurate pupil imaging and control.

Given top level design and specifications of the METIS instrument the thesis initial milestone is the delivery of a conceptual design for the pupil imager. This design will then evolve into a full preliminary design interfacing the sub-system with the METIS imager. In parallel end-to-end simulations of the pupil imager performance will be conducted. A laboratory prototype will be implemented. Finally the thesis will be concluded with the final design of the subsystem.
 
Framework (recommended length: 500-2000 char):
The SIM team of the CENTRA research unit has been developing advanced instrumentation for almost 20 years. One of the key areas of the team activity is developing leading edge instrumentation for the European Southern Observatory (ESO).
The team designed, built and integrated he camera of the multi-conjugate adaptive optics system deployed at a giant 8m telescope of Paranal Observatory. More recently SIM designed, built and integrated the acquisition camera of the GRAVITY interferometric instrument. GRAVITY is the most advanced ground-based astronomical instrument ever built with dedicated adaptive optics, metrology, fringe tracking and interferometric beam combination. The acquisition camera tracks the beams of the four 8m telescopes simultaneously, providing several parallel functions: pupil tracking; pupil imaging; aberration sensor an field imaging and tracking.
More recently the team is involved in developing advanced instrumentation for the next generation of extremely large telescopes – the E-ELT. This telescope has a factor of 5 larger diameter and provides and 25-fold increase in collecting area. Its construction and operation is the main objective of ESO for the coming decade. The E-ELT instrumentation development plan includes (in order of first light): a) the HARMONI and MICADO first light instruments; b) the METIS imager-spectrometer; c) the MOSAIC multi-object spectrograph and HIRES high resolution spectrograph. METIS is the instrument with Portuguese participation with earliest deployment in the E-ELT instrumentation plan.
 
Tasks (recommended length: 1000-3000 char):
The thesis research will be conducted in the demanding environment of leading edge instrument developing for the most advanced telescope ever built. Several steps and tasks will be conducted:
1. Following mandatory courses of the FCUL PhD programme. These courses will be focused on the theme of the thesis and conducted in tutorial fashion.
2. Literature review on advanced instrumentation in the thermal infrared, including pupil guiding, adaptive optics, imaging and coronagraphy.
3. Thorough study of the METIS instrument with special emphasis on the imager and pupil guiding subsystem.
4. Development of the pupil guiding concept with ZEMAX.
5. Preliminary end-to-end estimation of the pupil guiding performance.
6. Writing of paper I on the pupil guiding concept and performance.
7. Full pupil guiding subsystem preliminary design including writing documentation.
8. Prototype realization on the most critical aspects of the deign that will require experimental validation and performance evaluation.
9. Writing of paper II on the performance of the investigated critical items.
10. Job search. It is the practice of our team PhD students to start job searching 1 yr before the end of the thesis. All instrumentation PhD students have found a job before thesis completion.
11. Final design of the pupil guiding subsystem.
12. Thesis writing
 
Research centre/lab or R&D unit hosting the thesis project:
CENTRA
 
University to which the thesis project will be presented:
FC/UL - Faculdade de Ciências, Universidade de Lisboa
 
DAEPHYS Scientific Domain in which the project fits:
Instrumentation
 
Relation of the project to the Scientific Domains of DAEPHYS:
The thesis project is fully inside the instrumentation and optical technology scientific domains.
 
Candidate profile:
We seek a candidate with interest in instrumentation and optical technologies, more specifically in optics, opto-mechanical design and end-to-end simulation. The candidate should have a good command of the English language, be able to work in teams, be autonomous, resilient and hard working.
The thesis being developed inside an international consortium requires the availability to travel across Europe, to present the work progress in consortium meetings and international conferences.
 
Does this proposal involve more than one University?:
no
 
Synergies between the two Universities participating in the proposal:
DAEPHYS strongly encourages the presentation of thesis projects in co-supervision by researchers from two of the universities participating in the Program. In this field, explain the benefits resulting from the proposed co-supervision and the involvement of elements from the two universities, e.g. building critical mass teams, profiting from existing infrastructures or advanced equipments, profiting from expert technical know-how, etc. If the proposal involves only one University, write n/a.
(recommended length: 500-1000 char)
:
 
Does this proposal involve a company?:
no
 
Proposals involving a company:
DAEPHYS strongly encourages the presentation of thesis projects involving a company, preferably a high-tech company. These proposals have to: 1) be centered on a technological problem in which the partner company has been (or plan / would like to be) involved; 2) have a co-supervisor on the enterprise; 3) include part of the project to be carried out in the company.
(recommended length: 500-1000 char)
:

 

Supervisor

Name:Antonio Amorim
Institution:Faculdade de Ciências da Universidade de Lisboa and CENTRA
email:Antonio.Amorim@sim.fc.ul.pt
 
link to CV or indication of ORCID ID:
http://orcid.org/0000­0003­0638­2321

 

Co-Supervisor

Name:Paulo Garcia
Institution:Faculdade de Engenharia da Universidade do Porto and CENTRA
email:pgarcia@fe.up.pt
 
link to CV or indication of ORCID ID:
http://orcid.org/0000-0002-1678-3535

 

Uploaded PDF document: proposal-018.pdf