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8th International Workshop on Thin Films and New Ideas for Pushing the Limits of RF Superconductivity

Oct 8 – 10, 2018
INFN - Laboratori Nazionali di Legnaro
Europe/Rome timezone

Workshop Secretariat

Session

Other SC Materials beyond Niobium

Oct 9, 2018, 9:00 AM
Villi Room (INFN - Laboratori Nazionali di Legnaro)

Villi Room

INFN - Laboratori Nazionali di Legnaro

Viale dell'Università 2, Legnaro (Padova) - Italy

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  1. 10. Development of MgB2/Cu cavities by HPCVD
    Prof. Xiaoxing Xi (Temple University)
    10/9/18, 9:00 AM
    Other superconducting materials beyond niobium
    MgB2 is a promising superconductor to replace Nb for SRF cavities. Clean MgB2 thin films have a low residual resistivity (<0.1 µΩcm) and a high Tc of 40 K, promising a low BCS surface resistance. Its thermodynamic critical field Hc is higher than Nb, potentially leading to a higher maximum accelerating filed. The lower critical field Hc1 of MgB2 is lower than Nb, but it can be enhanced by...
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  2. 15. Initial results from investigations into the use of NbN thin films sputter coated onto copper for SRF applications.
    Mr Stewart Leith (Universität Siegen)
    10/9/18, 9:25 AM
    Other superconducting materials beyond niobium
    Considerable research is currently underway to utilise alternative materials to bulk Nb in SRF cavities. This is with the aim to increase their performance to that required by future accelerators. In this contribution, the results of two investigations into dc magnetron sputtered Nb thin films on Cu substrates are summarized, as well as initial results from research which has been conducted...
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  3. 21. Surface Characterization of NbTiN multilayer films for accelerator applications
    Mr David Beverstock (Jefferson Lab)
    10/9/18, 9:50 AM
    Other superconducting materials beyond niobium
    Further enhancement of superconducting accelerating cavity performance calls upon the development of materials beyond bulk niobium (Nb). Superconducting RF (SRF) is a surface phenomenon; for most superconducting materials the RF penetration depth is in the range of hundreds of nanometers. Due to the field penetration enhancement occurring in films with a thickness smaller than their nominal...
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  4. 1. RF characterization of thin films at Cornell
    Mr Thomas Oseroff (Cornell University)
    10/9/18, 10:15 AM
    Other superconducting materials beyond niobium
    A TE mode niobium sample host cavity was used to characterize the RF performance of large 5” diameter thin film samples at 4 GHz. Exciting results were obtained from industry partner Ultramet’s CVD Nb3Sn grown on a copper substrate. These results indicate that slight alterations to the deposition process and use of higher purity precursors could lead to high-performance Nb3Sn coatings on...
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  5. 51. First RF characterization of an SIS sample
    Mr Sebastian Keckert (Helmholtz-Zentrum Berlin)
    10/9/18, 10:40 AM
    Other superconducting materials beyond niobium
    RF-surface resistance measurements have been performed on an S-I-S multilayer sample. The sample was prepared at JLab using DC-magnetron sputtering of a 75 nm NbTiN layer on a 15 nm AlN insulator layer on bulk niobium. The sample (and sputtered area) was a circular disc of 75 mm diameter, welded on an 85 mm high Nb pipe of the same outer diameter. This geometry allowed performing RF...
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