Reference : UMR9012-SYLPRA0-046
Workplace : ORSAY
Date of publication : Tuesday, August 2, 2022
Scientific Responsible name : Tiina Suomijärvi
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 October 2022
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
The Cherenkov Telescope Array (CTA) is an international experiment for high energy gamma-ray astronomy. The CTA Observatory is composed of large (23m diameter, LST), medium (12m diameter, MST) and small (4m diameter, SST) Cherenkov telescopes that will be installed at two sites: La Palma (Canary Islands) and Paranal (Chile).
With excellent angular and energy resolution and increased sensitivity over a wide energy range (30 GeV to 300 TeV), CTA will provide a major contribution to the study of cosmic accelerators. It will address several key questions in the physics of
of astroparticles. CTA will explore particle acceleration in a quarter of the extra-galactic sky, in the Galactic plane and in the Large Magellanic Cloud. The Key Science Projects (KSP) will investigate transient phenomena, particle acceleration to PeV energies in theenergies in our Galaxy (PeVatrons), active galactic nuclei (AGN), and star formation systems of great variety. CTA will also investigate the ultimate nature of matter and physics beyond the Standard Model and search for signatures of dark matter.
The CTA group at IJClab-Orsay is contributing to the NectarCAM project, the camera for medium-sized telescopes. In particular, the IJClab is responsible for the design and production of the NectarCAM calibration system. The technical development is now complete and tests of this calibration system are underway. The installation of the first MST telescope with the NectarCam camera at the La Palma site is planned for 2022. The analysis of the calibration data with the system developed by the IJClab team is supervised by Giulia Hull, head of the IJClab detector group.
The group is also actively preparing the science and exploitation of CTA data, for both extra-galactic and galactic sources. Concerning galactic sources, the group studies in particular PeVatrons. Indeed, the observation of high-energy gamma rays can indicate the acceleration of charged particles up to PeV energies, thus contributing to the big question about the origin of cosmic rays. The analysis of multi-wavelength data combined with CTA data may contribute to the resolution of the cosmic ray origin question.
Scientific, material and financial conditions of the research project
The construction of the CTA is financed in France (50 MEuro "Très grande infrastructure de recherche"). The student will benefit from the technical and administrative support of IJCLab for the computing tools, for the missions and for the general operation.
Objective of valorization of the PhD student's research work
The research activity will be valorised through publications, presentations at collaboration meetings and contributions to workshops and conferences.
Science with the Cherenkov Telescope Array,
The Cherenkov Telescope Array Consortium, arXiv:1709.07997 [astro-ph.IM]
The Irène Joliot-Curie Laboratory of Physics of the 2 Infinities is a laboratory of physics of the two infinities under the supervision of the CNRS, the University of Paris-Saclay and the University of Paris, born in 2020 from the merger of five UMRs located on the university campus of Orsay: Centre de sciences nucléaires et de sciences de la matière (CSNSM), Imagerie et modélisation en neurobiologie et cancérologie (IMNC), Institut de physique nucléaire d'Orsay (IPNO), Laboratoire de l'accélérateur linéaire (LAL) and Laboratoire de physique théorique (LPT).
The laboratory's research themes are nuclear physics, high-energy physics, astroparticles and cosmology, theoretical physics, particle accelerators and detectors as well as technical research and development and associated applications for energy, health and the environment.
The structure has a very important technical capacity (about 280 engineers and technicians) in all the major fields required to design, develop and implement the experimental devices necessary for its scientific activity: mechanics, electronics, computing, instrumentation, acceleration techniques and biology. These technical strengths represent a major asset for the design, development and use of the necessary instruments (accelerators and detectors). The presence of research infrastructures and technological platforms on the laboratory site is also a major asset. Finally, around 90 ITAs from the administrative and support services work alongside the scientists and engineers.
Constraints and risks
The thesis will be attached to the PHENIICS doctoral school.
Travel in Europe will be required.
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