4 results on '"Nikita Shcheblanov"'
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2. A Systematic Error in the Internal Friction Measurement of Coatings for Gravitational Waves Detectors
- Author
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Alex Amato, Diana Lumaca, Elisabetta Cesarini, Massimo Granata, Anaël Lemaître, Matteo Lorenzini, Christophe Malhaire, Christophe Michel, Francesco Piergiovanni, Laurent Pinard, Nikita Shcheblanov, Gianpietro Cagnoli, HEP, INSPIRE, Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire des matériaux avancés (LMA), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Paris-Est Marne-la-Vallée (UPEM), Institut fur Festkorperforschung, Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, and Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association
- Subjects
Condensed Matter - Materials Science ,[PHYS.GRQC] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] ,[PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,General Relativity and Quantum Cosmology (gr-qc) ,[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] ,Astrophysics - Instrumentation and Methods for Astrophysics ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,General Relativity and Quantum Cosmology ,[PHYS.COND] Physics [physics]/Condensed Matter [cond-mat] - Abstract
Low internal friction coatings are key components of advanced technologies such as optical atomic clocks and high-finesse optical cavity and often lie at the forefront of the most advanced experiments in Physics. Notably, increasing the sensitivity of gravitational-wave detectors depends in a very large part on developing new coatings, which entails developing more suitable methods and models to investigate their loss angle. In fact, the most sensitive region of the detection band in such detectors is limited by the coating thermal noise, which is related to the loss angle of the coating. Until now, models which describe only ideal physical properties have been adopted, wondering about the use of one or more loss angles to describe the mechanical properties of coatings. Here we show the presence of a systematic error ascribed to inhomogeneity of the sample at its edges in measuring the coating loss angle. We present a model for disk-shaped resonators, largely used in loss angle measurements, and we compare the theory with measurements showing how this systematic error impacts on the accuracy with which the loss model parameters are known.
- Published
- 2022
3. Argon and Other Defects in Amorphous SiO2 Coatings for Gravitational-Wave Detectors
- Author
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Annalisa Paolone, Ernesto Placidi, Elena Stellino, Maria Grazia Betti, Ettore Majorana, Carlo Mariani, Alessandro Nucara, Oriele Palumbo, Paolo Postorino, Marco Sbroscia, Francesco Trequattrini, Massimo Granata, David Hofman, Christophe Michel, Laurent Pinard, Anaël Lemaitre, Nikita Shcheblanov, Gianpietro Cagnoli, and Fulvio Ricci
- Subjects
Amorphous silica ,gravitational wave detectors ,defects ,argon release ,Materials Chemistry ,Surfaces and Interfaces ,Surfaces, Coatings and Films - Abstract
Amorphous SiO2 thin films are one of the two components of the highly reflective mirror coatings of gravitational-wave detectors. For this study, layers of amorphous SiO2 on crystalline Si substrates were produced by ion-beam sputtering (IBS), using accelerated neutralized argon ions as sputtering particles, as is the case for the actual mirror coatings of gravitational-wave detectors. The aim of this study is to investigate the possible presence of various defects in the materials in order to improve the coating quality. We provide evidence that, due to the synthesis method, about 0.2 wt.% of Ar is present in the coatings, and it can be released by means of thermal treatments, starting around 400 °C. The time and temperature to obtain the total release of Ar increases with the coating thickness; for a thickness of 100 nm, all argon is released below 600 °C, while an isotherm of one hour at 900 °C is necessary for a coating 5 μm thick. Besides the Ar atoms left from the synthesis, other defects, such as Si clusters and silicon dangling bonds, are present in the coatings. The concentration of both of them is strongly reduced by thermal treatments either in vacuum or in air. The overall thickness of the coating is slightly increased after thermal treatments, as witnessed by the change of the period of interference fringes.
- Published
- 2022
4. Laser energy deposition in glasses with Bessel beams
- Author
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Couairon, Arnaud, Jukna, Vytautas, Minardi, Stefano, Jedrkiewicz, Ottavia, Selva, M., Lamperti, Massimo, Di Trapani, Paolo, Nikita, Shcheblanov, Itina, Tatiana, Stoian, Razvan, XIE, CHEN, Zhang, J., Dudley, John Michael, Courvoisier, François, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), Laboratoire Hubert Curien [Saint Etienne] (LHC), Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche [Roma] (CNR), Neuroanesthesia, Fondazione IRCCS Istituto Neurologico 'Carlo Besta', Dipartimento di Scienza e Alta Technologia, Universitá degli Studi dell’Insubria, PIERS, and ANR-11-BS04-0010,NANOFLAM,Contrôle de la FiLAMentation et de la génération de plasma avec les impulsions non-diffractantes femtoseconde en régime nonlinéaire. Applications à la NANO-structuration laser à ultra haut rapport de forme.(2011)
- Subjects
[PHYS]Physics [physics] ,[SPI]Engineering Sciences [physics] ,InformationSystems_GENERAL ,[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,GeneralLiterature_INTRODUCTORYANDSURVEY ,ComputerApplications_MISCELLANEOUS ,[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering ,ComputingMilieux_MISCELLANEOUS ,GeneralLiterature_MISCELLANEOUS - Abstract
International audience; Keynote talk
- Published
- 2015
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