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Reference : UMR5306-VALMAR-001
Workplace : VILLEURBANNE
Date of publication : Tuesday, October 29, 2019
Type of Contract : FTC Scientist
Contract Period : 23 months
Expected date of employment : 2 January 2020
Proportion of work : Full time
Remuneration : Between 2643 and 3047 € gross monthly
Desired level of education : PhD
Experience required : Indifferent
The postdoc will be hired to strengthen the research on coatings and notably its activity will be focused on the characterization and synthesis for the projects ViSIONs and CRD.
g-MAG is leading three projects:
• the ANR ViSIONs, dedicated to study the physics of coating deposition;
• the IDEX-LYON OSAG, dedicated to the development of large substrates of monocrystalline sapphire with ultra-low absorption;
• the EGO-Virgo CRD, dedicated to the development of new coatings for the detector Advanced Virgo +.
The person appointed to this position will work on:
• Development of the mechanical characterization bench based on the resonant method, known as GeNS, both for room and cryogenic temperatures
• Development of the optical absorption bench based on the bolometric method of measurement, working at cryogenic and room temperatures
• Characterization of the mechanical and optical response of coatings and development of models able to interpret the data
• Participation to the synthesis of coatings by Pulsed Laser Deposition (PLD) and the successive treatment by Rapid Thermal Annealing (RTA)
The successful candidate will be centrally involved in the achievement of the following results:
• For ViSIONs: find the experimental correlations between the microscopic and macroscopic properties of the coatings
• For CRD: - understanding if the High Index Silica Glasses can be used in GW detectors; testing the effect of the high coordination number on losses for SiC and SiN;
- investigate the possibility to control the crystallization to reduce the mechanical losses by long range coordination
Propositions of research activities from the candidate are welcome.
Areas of expertise: solid state physics or material research for gravitational wave detectors.
Specific skills: familiarity with vacuum systems, electronic circuits and mechanical design and realization, data acquisition and analysis limited to mechanical loss and optical response.
Personal skills: ability to work in a group, ability to communicate results to a conference audience.
Degree of experience: the candidate could have only the experience gained in her/his thesis work.
The Institute Lumière Matière (iLM-UMR-5306) is rapidly strengthening its role in the Gravitational Waves (GW) detectors development. Since March 2019 the group g-MAG (Matériaux pour l'Astronomie Gravitationnelle), based at iLM and the Laboratoire Navier (UMR 8205), has been accepted as member of the Virgo collaboration. The scientific objective of g-MAG is to investigate the origin of thermal noise and optical absorption in the amorphous and crystalline materials used in GW detectors and possibly to reduce them below the limit imposed by the different detectors.
The research methodology is based on the synergy between three activities: synthesis of materials; simulation of structures and their dynamics; characterization of materials at different spatial and time scales. All these activities are already present in the group g-MAG.
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