Profil Recherché

Titulaire d’un doctorat ou diplôme équivalent ou justifiant de titres et travaux scientifiques jugés équivalents par l’instance compétente de l’établissement. Il n’y a aucune condition d’âge ou de nationalité pour candidater. Tous les emplois CNRS sont accessibles aux personnes en situation de handicap en bénéficiant d’aménagement d’épreuves rendus nécessaires par la nature du handicap

Stratégie d'établissement

This interdisciplinary CNRS chair will be able to register at the interface of the CNRS institutes of engineering sciences and systems (INSIS) and the national institute of science for the universe (INSU), also in connection with its Mission for Transversal and Interdisciplinary Initiatives (MITI).

Stratégie du laboratoire d'accueil

The ARTEMIS laboratory is historically at the origin of the Franco-Italian gravitational wave detector Virgo and has, since its creation, supplied the interrogation laser of the interferometer. The ARTEMIS laboratory continues to be responsible for the pre-stabilised laser system which includes filter cavities as well as frequency and power stabilisation systems. In this context, the laboratory has worked since its creation on the validation in metrological terms and the integration of new advanced technologies, namely solid state amplifiers and fiber lasers. In the continuity of these activities, the ARTEMIS laboratory is involved in the Einstein Telescope project. He is, among other things, co-responsible for the design of the pre-stabilised laser system within this project. The skills acquired within the ARTEMIS laboratory during all these years of research on high-power stabilised lasers are used for fusion by magnetic confinement, the aim being to increase the efficiency of neutral injectors by photoneutralisation.

Stratégie Internationale

Research on new laser and optical technologies for gravitational wave detectors will meet the needs of different international collaborations. Currently, the Virgo detector is operational and is preparing for future series of observations until the end of the 2020s. The research of the CNRS chair will contribute to improving the performance of Virgo. Virgo is a large international research collaboration, whose members come mainly from Europe. The research of the CNRS chair will therefore have great visibility in many countries. Given the collaboration established between Virgo, the American detector LIGO and the Japanese detector KAGRA, this research will have even greater visibility throughout the world. High power fiber laser amplifiers are recognised as the future of gravitational wave interferometers. As such, they are considered promising for future gravitational wave detectors. The CNRS Chair will contribute to the future European detector, Einstein Telescope (ET), which will begin its observations in the mid-2030s. The ET Collaboration is already large and productive, with high visibility. The research carried out by the CNRS Chair should certainly arouse the interest of other researchers, as well as that of potential doctoral and post-doctoral students. The establishment of collaborative research projects with other groups around the world will be likely, and important. Collaborations with industrial partners will also be likely.

Répertoire national des structures de recherche (RNSR) du laboratoire d'accueil

201220434N

Résumé du projet scientifique

The gravitational signal GW170817 revolutionised our way of studying the Universe since for the first time we were able to observe, thanks to the gravitational waves emitted, the merger of two neutron stars which created a compact object whose nature, black hole or massive neutron star, is still a subject of debate. Answering this fundamental question in astrophysics is partly solving the enigma of the mass gap between the most massive neutron star and the lightest black hole ever observed. It also means better understanding the populations of compact objects in the Universe and the mechanisms by which these objects form. The electromagnetic emission which takes place after the fusion does not make it possible to understand its nature. Only the gravitational waves emitted just after the merger can provide information on the nature of the object created. The main difficulties of this research are the frequency domain of the expected signal, beyond 1 kHz, where the sensitivity of gravitational wave detectors is limited by the shot noise of the laser requiring the development of single-mode and single-frequency laser of high power as well as the corresponding stabilisation system. This CNRS chair concerns the development of pre-stabilised laser systems for future medium and long-term gravitational wave detectors. This work revolves around three aspects :
- High power lasers (several hundred Watts) single frequency and single spatial mode based on wide mode fibers. The aim is to study the non-linear effects likely to limit its operation in the context of a detector.
- High power filter cavities and their stabilization over a wide frequency band.
- The development of power stabilization systems below the shot noise level.
This activity is both part of the ARTEMIS laboratory's commitment to the Virgo collaboration and part of the studies for the benefit of third-generation detectors. It is also part of the collaboration with the LP2N laboratory as well as the company AzurLight Systems (ALS) in Bordeaux.

Résumé du projet d'enseignement

The CNRS chair will be deployed at the SPECTRUM University Research School – Basic Sciences & Engineering. He/she will strengthen the pedagogical team of the physics department and will teach at bachelor and master level. Gravitational waves are taking up more and more space in astrophysics. To meet the need for interaction between these two areas of research, the junior professor will create a teaching module for the MAUCA master's in astrophysics on instrumentation for the detection of gravitational waves. His skills in instrumentation and metrology will be able to enrich the educational offer, in particular by contributing as a teacher in the project of the new master's degree in photonics in alternation (project led by Laurent Labonté within UCA).

Environnement Financier

• Total financé (dont package ANR) : 200 k€
• Total du projet : 200 k€

Diffusion scientifique

The dissemination of the results will be done through world-class scientific productions: publications, patents, software... In addition, the results will be communicated to various  targets such as scientific communities, media, decision makers, general public, schools, etc., with an adapted calendar. Specific tools may  be developed such as websites, newsletters, meetings, international symposia, summer schools and conferences.

Science ouverte

The CNRS is developing a strong policy in favor of open science. Open science consists of making research results "as accessible  as possible and closed as necessary". As such, the CNRS aims to make 100% of the texts of publications resulting from the work of its laboratories accessible , in particular through deposit in HAL. The data produced must also be made available and reusable, except for specific restrictions. In addition, the guiding principles of individual evaluation have been revised in accordance with the DORA declaration, to be more qualitative and to take into account all facets of the researcher's profession.

Science et société

The relationship between science and society is now recognized as a full dimension of scientific activity. The project will develop this dimension in synergy with all the partners. The resulting research work will contribute to informing public decision-making. Participatory science initiatives may be initiated with actors from the project’s socio-economic and cultural eco-system .

Indicateurs

The activity will be evaluated in particular on the basis of scientific production (publications, software, patents, etc.), on institutional and private partnerships formalized by contracts, on international presence, on the promotion of work to  multidisciplinary scientific communities, on innovation and its transfer to society and on scientific dissemination to non-specialist audiences.

Modalités d'organisation des auditions

Seul(e)s seront convoqué(e)s aux auditions les candidat(e)s sélectionné(e)s sur dossier par la commission de sélection