Elsayed-Ali, H E - Search Results - CERN Document Server

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Optimizing superconducting Nb film cavities by mitigating medium-field $Q$-slope through annealing / Abdisatarov, B. (Old Dominion U. (main) ; AMAC Intl., Newport News ; Fermilab) ; Eremeev, G. (Fermilab) ; Elsayed-Ali, H.E. (Old Dominion U. (main) ; AMAC Intl., Newport News) ; Bafia, D. (Fermilab) ; Murthy, A. (Fermilab) ; Sung, Z. (Fermilab) ; Netepenko, A. (Fermilab) ; Romanenko, A. (Fermilab) ; Carlos, C.P.A. (CERN) ; Rosaz, G.J. (CERN) et al.
Niobium films are of interest in applications in various superconducting devices, such as superconducting radiofrequency cavities for particle accelerators and superconducting qubits for quantum computing. In this study, we addressed the persistent medium-field Q-slope issue in Nb film cavities, which, despite their high-quality factor at low RF fields, exhibit a significant Q-slope at medium RF fields compared to bulk Nb cavities. [...]
arXiv:2507.08638; FERMILAB-PUB-25-0017-SQMS-TD-V.- 2025-06-26 - 12 p. - Published in : Supercond. Sci. Technol. 38 (2025) 075006 Fulltext: 2507.08638 - PDF; a97bac546fcf41977752154d510e5e84 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Accepted Manuscript

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Microwave Loss Characteristics of Nb Films for Quantum Computing / Abdisatarov, B (Fermilab ; Old Dominion U. (main) ; Jefferson Lab) ; Bafia, D (Fermilab) ; Murthy, A (Fermilab) ; Eremeev, G (Fermilab) ; Elsayed-Ali, H E (Old Dominion U. (main) ; Jefferson Lab) ; Lee, J (Fermilab) ; Netepenko, A (Fermilab) ; Grassellino, A (Fermilab) ; Romanenko, A (Fermilab) ; Carlos, C P A (CERN) et al.
Niobium films typically constitute a significant component in the construction of modern two-dimensional superconducting qubit architectures, yet their contribution to the total decay rate is not fully understood, making it difficult to definitively identify dominant loss channels in present designs. [...]
FERMILAB-PUB-22-550-TD. - 19.
Fermilab Library Server - Fulltext

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Direct Measurement of Microwave Loss in Nb Films for Superconducting Qubits / Abdisatarov, B. (Fermilab ; Jefferson Lab ; Old Dominion U.) ; Bafia, D. (Fermilab) ; Murthy, A. (Fermilab) ; Eremeev, G. (Fermilab) ; Elsayed-Ali, H.E. (Jefferson Lab ; Old Dominion U.) ; Lee, J. (Fermilab) ; Netepenko, A. (Fermilab) ; Carlos, C.P. A. (CERN) ; Leith, S. (CERN) ; Rosaz, G.J. (CERN) et al.
Niobium films are a key component in modern two-dimensional superconducting qubits, yet their contribution to the total qubit decay rate is not fully understood. The presence of different layers of materials and interfaces makes it difficult to identify the dominant loss channels in present two-dimensional qubit designs. [...]
arXiv:2407.08856; FERMILAB-PUB-24-0374-SQMS.- 2024-09-16 - 20 p. - Published in : Appl. Phys. Lett. 125 (2024) 124002 Fulltext: 2407.08856 - PDF; 968bae4e0dff6c77e26a68caebca446d - PDF; External link: Fermilab Library Server

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Medium-Grain Niobium SRF Cavity Production Technology for Science Frontiers and Accelerator ApplicationsMedium grain niobium SRF cavity production technology for science frontiers and accelerator applications / Myneni, G. (Old Dominion U. ; Unlisted, US ; Old Dominion U. (main) ; Jefferson Lab) ; Hani E. Elsayed-Ali (Old Dominion U. ; Old Dominion U. (main)) ; Islam, Md Obidul (Old Dominion U. ; Old Dominion U. (main)) ; Sayeed, Md Nizam (Old Dominion U. ; Old Dominion U. (main)) ; Ciovati, G. (Jefferson Lab ; Old Dominion U.) ; Dhakal, P. (Jefferson Lab) ; Rimmer, R.A. (Jefferson Lab) ; Carl, M. (Unlisted, US) ; Fajardo, A. (Unlisted, US) ; Lannoy, N. (Unlisted, US) et al.
We propose cost-effective production of medium grain (MG) niobium (Nb) discs directly sliced from forged and annealed billet. This production method provides clean surface conditions and reliable mechanical characteristics with sub-millimeter average grain size resulting in stable SRF cavity production. [...]
arXiv:2203.07371.- 2023-04-21 - 14 p. - Published in : JINST 18 (2023) T04005 Fulltext: PDF; External link: eConf
In : 2021 Snowmass Summer Study, Seattle, WA, United States, 11 - 20 July 2021, pp.T04005

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