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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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2.
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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.
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19.
Fermilab Library Server - Fulltext
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3.
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4.
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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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5.
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Key directions for research and development of superconducting radio frequency cavities
/ Belomestnykh, S. (Fermilab ; Stony Brook U.) ; Posen, S. (Fermilab) ; Bafia, D. (Fermilab) ; Balachandran, S. (Natl. High Mag. Field Lab.) ; Bertucci, M. (LASA, Segrate) ; Burrill, A. (SLAC) ; Cano, A. (Fermilab) ; Checchin, M. (Fermilab) ; Ciovati, G. (Jefferson Lab) ; Cooley, L.D. (Natl. High Mag. Field Lab.) et al.
Radio frequency superconductivity is a cornerstone technology for many future HEP particle accelerators and experiments from colliders to proton drivers for neutrino facilities to searches for dark matter. [...]
arXiv:2204.01178 ; FERMILAB-PUB-22-241-SQMS-TD.
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Fermilab Library Server - eConf - Fulltext - Fulltext
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Material quality & SRF performance of Nb films grown on Cu via ECR plasma energetic condensation
/ Valente-Feliciano, Anne-Marie (Jefferson Lab) ; Aull, Sarah (CERN) ; Eremeev, Grigory (Jefferson Lab) ; Proslier, Thomas (Argonne (main)) ; Reece, Charles (Jefferson Lab) ; Spradlin, Joshua (Jefferson Lab)
The RF performance of bulk Nb cavities has continuously improved over the years and is approaching the intrinsic limit of the material. Although some margin seems still available with processes such as N surface doping, long term solutions for SRF surfaces efficiency enhancement need to be pursued. [...]
2015 - 4 p.
- Published in : 10.18429/JACoW-SRF2015-TUPB029
Fulltext: PDF;
In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015, pp.TUPB029
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Fabrication, Tuning, Treatment and Testing of Two 3.5 Cell Photo-Injektor Cavities for the ELBE Linac
/ Arnold, A (HZDR) ; Murcek, P (HZDR) ; Teichert, J (HZDR) ; Xiang, R (HZDR) ; Eremeev, G V (JLAB) ; Kneisel, P (JLAB) ; Stirbet, M (JLAB) ; Turlington, L (JLAB)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.7: SCRF Gun at ELBE
As part of a CRADA (Cooperative Research and Development Agreement) between Helmholtz-Zentrum Dresden-Rossendorf (HZDR) and Thomas Jefferson Lab National Accelerator Facility (TJNAF) we have fabricated and tested two 1.3 GHz 3.5 cell photo-injector cavities from polycrystalline RRR niobium and large grain RRR niobium, respectively. [...]
EuCARD-CON-2011-047.
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2011.
Access to fulltext document
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9.
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A Comparison of Large Grain and Fine Grain Cavities Using Thermometry
/ Eremeev, Grigory V (CLASSE, Ithaca, New York) ; Padamsee, Hasan (CLASSE, Ithaca, New York)
2006 - 3 p.
External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.475
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10.
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A 1500MHz Niobium Cavity Made of Electropolished Half-Cells
/ Geng, R (LEPP, Cornell Univ.) ; Crawford, A (LEPP, Cornell Univ.) ; Eremeev, G (LEPP, Cornell Univ.) ; Padamsee, H (LEPP, Cornell Univ.) ; Sears, J (LEPP, Cornell Univ.)
SFR-2003-05-20-12; SFR-2003-12.-
2003 - 2 p.
Superconducting RF
Access to fulltext document: PDF; External link: Published version from JACoW
In : 20th IEEE Particle Accelerator Conference, Portland, OR, USA, 12 - 16 May 2003, pp.1312
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