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Your search keyword '"Eozenou, F."' showing total 7 results
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7 results on '"Eozenou, F."'

1. Crystallinity in Niobium oxides: A pathway to mitigate Two-Level System Defects in Niobium 3D Resonator for quantum applications

Author

Kalboussi, Y., Curci, I., Miserque, F., Troadec, D., Brun, N., Walls, M., Jullien, G., Eozenou, F., Baudrier, M., Maurice, L., Bertrand, Q., Sahuquet, P., and Proslier, T.

Subjects
Physics - Applied Physics, Quantum Physics
Abstract

Materials imperfections in Nniobium based superconducting quantum circuits, in particular, two-level-system (TLS) defects, are a major source of decoherence, ultimately limiting the performance of quantum computation and sensing. Thus, identifying and understanding the microscopic origin of possible TLS defects in these devices and developing strategies to eliminate them is key to superconducting qubit performance improvement. In this paper, we demonstrate the reduction of two-level system losses in three-dimensional superconducting radio frequency (SRF) niobium resonators by a 10-hour high vacuum (HV) heat treatment at 650{\deg}C, even after exposure to air and high pressure rinsing (HPR). By probing the effect of this annealing on niobium samples using X-ray photoelectron spectroscopy (XPS) and high-resolution scanning transmission electron microscopy (STEM), we witness an alteration of the native oxide composition re-grown after air exposure and HPR and the creation of nano-scale crystalline oxide regions, which correlates with the measured tenfold quality factor enhancement at low fields of the 1.3 GHz niobium resonator.

Published
2024

2. Recent advances in metallographic polishing for SRF application

Author

Hryhorenko, O., Antoine, C. Z., Proslier, T., Eozenou, F., Dohmae, T., Keckert, S., Kugeler, O., Knobloch, J., and Longuevergne, D.

Subjects
Physics - Accelerator Physics
Abstract

This paper is an overview of the metallographic polishing R&D program covering Niobium and Copper substrates treatment for thin film coating as an alternative fabrication pathway for 1.3 GHz elliptical cavities. The presented research is the result of a collaborative effort between IJCLab, CEA/Irfu, HZB, and KEK in order to develop innovative surface processing and cavity fabrication protocols capable of meeting stringent requirements for SRF surfaces, including the reduction of safety risks and ecological footprint, enhancing reliability, improving the surface roughness, and potentially allowing cost reduction. The research findings will be disclosed., Comment: 5 pages, 8 figures, SRF23 conference

Published
2023

3. Multipacting mitigation by atomic layer deposition: The case study of titanium nitride.

Author

Kalboussi, Y., Dadouch, S., Delatte, B., Miserque, F., Dragoe, D., Eozenou, F., Baudrier, M., Tusseau-Nenez, S., Zheng, Y., Maurice, L., Cenni, E., Bertrand, Q., Sahuquet, P., Fayette, E., Jullien, G., Inguimbert, C., Belhaj, M., and Proslier, T.

Subjects
ATOMIC layer deposition, TITANIUM nitride, ELECTRON emission, QUALITY factor, RADIO frequency
Abstract

This study investigates the use of atomic layer deposition (ALD) to mitigate multipacting phenomena inside superconducting radio frequency cavities used in particle accelerators while preserving high quality factors in the 1010 range. The unique ALD capability to control the film thickness down to the atomic level on arbitrary complex shape objects enables the fine-tuning of TiN film resistivity and total electron emission yield (TEEY) from coupons to devices. This level of control allows us to adequately choose a TiN film thickness that provides both high resistivity to prevent Ohmic losses and a low TEEY to mitigate multipacting for the application of interest. The methodology presented in this work can be scaled to other domains and devices subject to RF fields in vacuum and sensitive to multipacting or electron discharge processes with their own requirements in resistivities and TEEY values. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Buffered Electropolishing -- a New Way for Achieving Extremely Smooth Surface Finish on Nb SRF Cavities To be Used in Particle Accelerators

Author

Wu, A. T., Rimmer, R. A., Lu, X. Y., Eozenou, F., Lin, L., Ciovati, G., Mammosser, J., Jin, S., Wang, E. D., Tian, H., Williams, J., Manus, R., Reece, C., Phillips, H., and Sommer, W.

Subjects
Physics - Accelerator Physics, Physics - Chemical Physics
Abstract

A new surface treatment technique for niobium (Nb) Superconducting Radio Frequency (SRF) cavities called Buffered Electropolishing (BEP) has been developed at JLab. It was found that BEP could produce the smoothest surface finish on Nb samples ever reported in the literature. Experimental results revealed that the Nb removal rate of BEP could reach as high as 4.09 um/min. This is significantly faster1 than that of the conventional electropolishing technique employing an acid mixture of HF and H2SO4. An investigation is underway to determine the optimum values for all relevant BEP parameters so that the high quality of surface finish achieved on samples can be realized within the geometry of an elliptical RF cavity. Toward this end, single cell Nb cavities are being electropolished with BEP electrolyte at both CEA-Saclay and JLAB. These cavities will be RF tested and the results will be reported through this presentation.

Published
2009

5. Reducing two-level systems dissipations in 3D superconducting niobium resonators by atomic layer deposition and high temperature heat treatment.

Author

Kalboussi, Y., Delatte, B., Bira, S., Dembele, K., Li, X., Miserque, F., Brun, N., Walls, M., Maurice, J. L., Dragoe, D., Leroy, J., Longuevergne, D., Gentils, A., Jublot-Leclerc, S., Jullien, G., Eozenou, F., Baudrier, M., Maurice, L., and Proslier, T.

Subjects
ELECTRON energy loss spectroscopy, ATOMIC layer deposition, SUPERCONDUCTING resonators, HEAT treatment, HIGH resolution electron microscopy, QUANTUM coherence
Abstract

Superconducting qubits have arisen as a leading technology platform for quantum computing, which is on the verge of revolutionizing the world's calculation capacities. Nonetheless, the fabrication of computationally reliable qubit circuits requires increasing the quantum coherence lifetimes, which are predominantly limited by the dissipations of two-level system defects present in the thin superconducting film and the adjacent dielectric regions. In this paper, we demonstrate the reduction of two-level system losses in three-dimensional superconducting radio frequency niobium resonators by atomic layer deposition of a 10 nm aluminum oxide Al2O3 thin films, followed by a high vacuum heat treatment at 650 °C for few hours. By probing the effect of several heat treatments on Al2O3-coated niobium samples by x-ray photoelectron spectroscopy plus scanning and conventional high resolution transmission electron microscopy coupled with electron energy loss spectroscopy and energy dispersive spectroscopy, we witness a dissolution of niobium native oxides and the modification of the Al2O3-Nb interface, which correlates with the enhancement of the quality factor at low fields of two 1.3 GHz niobium cavities coated with 10 nm of Al2O3. [ABSTRACT FROM AUTHOR]

Published
2024
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7. International Linear Collider Reference Design Report

Author

James Brau, Yasuhiro Okada, Walker, Nicholas J., Abdelhak Djouadi, Joseph Lykken, Klaus Monig, Mark Oreglia, Satoru Yamashita, Nan Phinney, Nobukazu Toge, Ties Behnke, Chris Damerell, John Jaros, Akiya Miyamoto, Béteille, A., Daniel Dzahini, Gallin-Martel, L., Grondin, D., Hostachy, J. Y., Lagorio, E., Lucotte, A., Morin, L., Sajot, G., Vescovi, C., Adloff, C., Del Carmen Alabau, M., Anduze, M., Antoine, C., Artru, X., Attie, D., E Augustin, J., Badaud, F., Bambade, P., Baudot, J., Bedjidian, M., Benyamna, M., Besancon, M., Besson, A., Blanchard, G., Boonekamp, M., Bosland, P., Boudry, V., E Boumediene, D., Bouquet, B., C Brient, J., Bruchon, M., Brun, N., Burke, D., Caliier, S., Carloganu, C., Cavallari, G., Chandez, F., Chauveau, J., Chefdeville, M., Chehab, R., Chel, S., Chevallier, M., Grojean, C., Colas, P., Collard, C., Colledani, C., Combaret, C., Cornat, R., Da Silva, W., Dadoun, O., David, J., Davier, M., christophe de La Taille, Deandrea, A., Delagnes, E., Delebecque, P., Devanz, G., Djouadi, A., Dorokhov, A., Doziere, G., Dulinski, W., Dulucq, F., Eozenou, F., Fleury, J., Fourches, N., Gaglione, R., Garvey, T., Pascal Gay, F Genat, J., Giganon, A., Giomataris, I., Grandjean, D., Grenier, G., Gris, P., F Grivaz, J., Guler, H., Heini, S., Henrot-Versille, S., Hermel, R., Himmi, A., Hugonie, C., Hu-Guo, C., Jauffret, C., Jehanno, D., Kado, M., Kapusta, F., Karyotakis, Y., Kircher, F., Knecht, M., Lafaye, R., Laktineh, I., Laloum, M., Latour, E., Ninh Le, D., Le Diberder, F., Le Dû, P., Lebbolo, H., Lecoq, J., Luong, M., Lutz, P., Malaescu, B., Manen, S., Martin-Chassard, G., Mathez, H., Mora Freitas, P., Morel, F., Morisseau, F., Moultaka, G., Mueller, A., Margarete Muhlleitner, M., Napoly, O., Payet, J., Pillet, N., Poschl, R., Prast, J., Prat, S., Raux, L., Reinhard, M., Richard, F., Cécile Rimbault, Rossel, F., Rouge, A., Royer, L., Royole-Degieux, P., Royon, C., Levi Sanchez, A., Savoy-Navarro, A., Schibler, E., Sefri, R., Seguin-Moreau, N., Simon, C., Singh, R. K., Titov, M., Uriot, D., Valin, I., C Vanel, J., Variola, A., Videau, H., Vincent, P., M Virey, J., Visentin, B., Wallon, S., Winter, M., Wormser, G., Zerwas, D., Zhen Zhang, Zomer, F., Delferriere, O., Imbault, D., Additional Authors Not Shown, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Théorie, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), 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)-Université Claude Bernard Lyon 1 (UCBL), 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), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Louis Pasteur - Strasbourg I, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Service de Physique Théorique (SPhT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), ILC, Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), 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)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Université Louis Pasteur - Strasbourg 1 (ULP), and Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract

ILC Global Design Effort and World Wide Study

Published
2007

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