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10th International Workshop on Thin Films and New Ideas for Pushing the Limits of RF Superconductivity

Sep 19 – 23, 2022
Jefferson Lab
US/Eastern timezone

Conference Services

Session

Nb thin film technology

Mo4
Sep 19, 2022, 2:10 PM
Jefferson Lab

Jefferson Lab

Conveners

Nb thin film technology: 1

  • Anne-Marie Valente-Feliciano (Jefferson Lab)

Nb thin film technology: 2

  • Anne-Marie Valente-Feliciano (Jefferson Lab)

Presentation materials

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  1. 21. Study of the influence of the manufacturing process and thermal cycling on the RF performance of 1.3 GHz Nb/Cu SRF cavities
    Lorena Vega (CERN)
    9/19/22, 2:10 PM
    SRF Thin Films Characterization: Cryogenic & RF measurements

    Nb/Cu coated SRF cavities present several advantages with respect to bulk Nb cavities. However, a systematic degradation of the performance at high accelerating gradients is observed.

    At CERN, a vast R&D program has been conceived to find an optimized recipe for manufacturing Nb/Cu coated cavities, from the production and treatments of the copper substrates to the thin film deposition. In...

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  2. 12. Ion energy analysis of a bipolar HiPIMS discharge using a retarding field energy analyser
    Felix Walk ((Remote))
    9/19/22, 2:40 PM
    Nb thin film technology

    The time evolution of the positive ion energy distribution functions (IEDF's) at the substrate position in an asymmetric bipolar high-power impulse magnetron (HiPIMS) system was determined using a gridded energy analyser. This was done for a range of operating conditions, namely the positive voltage Urev and “on-time” negative pulse duration neg. The magnetron sputtering discharge was...

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  3. 11. SRF Thin Film Coating Development at IHEP
    Dr Ping He (IHEP)
    9/19/22, 3:10 PM
    Nb thin film technology

    This paper summarizes of SRF thin film coating facilities set-up and progress at the Institute of High Energy Physics (IHEP), and presents preliminary results of 1.3 GHz 1-cell cavities coated with Nb, Nb3Sn, etc. The characteristics of witness samples at different locations inside the cavity revealed the uniform quality of the coating.

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  4. 31. Characterization of TESLA-shaped single-cell Nb thin-film cavity with varying RRR values at low temperatures
    Bektur Abdisatarov
    9/19/22, 4:05 PM
    Nb thin film technology

    Niobium thin films are used in macroscopic SRF cavities for particle accelerators which are under study for microscopic superconducting qubits for quantum computing. The superconducting properties of niobium in microwave fields vary significantly with lattice defects and impurity content, where sub-at.% impurity level can reduce or increase microwave surface resistance by an order of...

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  5. 42. Nb film Technology - Discussion
    9/19/22, 4:35 PM
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