Stewart Leith ESR 14 Universitt Siegen stewart leithunisiegen

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Stewart Leith (ESR 14) Universität Siegen stewart. leith@uni-siegen. de EASITrain – European Advanced Superconductivity

Stewart Leith (ESR 14) Universität Siegen stewart. leith@uni-siegen. de EASITrain – European Advanced Superconductivity Innovation and Training. This Marie Sklodowska-Curie Action (MSCA) Innovative Training Networks (ITN) has received funding from the European Union’s H 2020 Framework Programme under Grant Agreement no. 764879

Contents 1. Research topic description 2. Work plan and intended outcomes 3. Challenges and

Contents 1. Research topic description 2. Work plan and intended outcomes 3. Challenges and how to mitigate them 4. Status 2 S. Leith, 22. 05. 2021

Research Topic Description ■ DC and Hi. PIMS Cathodes 400 mm Ø 400 mm

Research Topic Description ■ DC and Hi. PIMS Cathodes 400 mm Ø 400 mm 3 *[1] M. Vogel. Proceedings of Aries 4 th WP 15 meeting. (2018) S. Leith, 22. 05. 2021

Research Topic Description 2. Production of a quality assessment matrix based on microstructural and

Research Topic Description 2. Production of a quality assessment matrix based on microstructural and electrical properties as a function of substrate type and substrate temperature. 65 mm Cu sample. 3 *[2] M. Vogel. Proceedings of Aries 1 st WP 15 meeting. (2017) S. Leith, 22. 05. 2021

Research Topic Description 3. Optimisation of the synthesis process with respect to RF performance.

Research Topic Description 3. Optimisation of the synthesis process with respect to RF performance. Correlation of essential process parameters with the thin-film structure and its characteristics. RF characteristics will be determined by ESR 8 at HZB. 65 mm diameter disk sample from HZB. [3] O. Kugeler et al, Activities with the quadrupole resonator at HZB, Proceeding of the Eu. CARD-2 3 rd Annual WP 12 Meeting (2016) 4 S. Leith, 22. 05. 2021

Work Plan Nb thin-film Starting Point for investigation. Learning phase of sputtering and characterisation

Work Plan Nb thin-film Starting Point for investigation. Learning phase of sputtering and characterisation methods Temperature control Pressure control Plasma control Gas type effects 5 Nb. N thin-film Process started once comfortable with Nb Stoichiometry control Process started once comfortable with Nb. N Highest complexity S. Leith, 22. 05. 2021

Work Plan (2) Sample Preparation • OFE Copper • Mechanical Polishing • Chemical Polishing

Work Plan (2) Sample Preparation • OFE Copper • Mechanical Polishing • Chemical Polishing • • • Sample Analysis • • SEM, XPS, FTIR, XRD, EDX, RRR EDX = Chemical Analysis SEM = Microstructural analysis RRR = Electrical Analysis RF Characterisation • Conducted at HZB by ESR 8 • Sample to be sized according to HZB requirements • Provides feedback regarding deposition parameters 6 S. Leith, 22. 05. 2021

Intended Outcomes ■ Improve and quantify substrate handling procedure and preparation process to obtain

Intended Outcomes ■ Improve and quantify substrate handling procedure and preparation process to obtain homogeneous coatings in a reproducible fashion (D 3. 1) ■ Understanding of interdependencies of the synthesis process and parameters and how they affect the outcome of thin-film coatings (D 3. 2) ■ Construction and utilisation of RRR (Residual Resistance Ratio) test setup ■ Construction and use of dedicated high temperature thin-film synthesis system ■ Document training contents concerning the synthesis of low-temperature superconducting thin-films (D 5. 2) 7 S. Leith, 22. 05. 2021

Challenges and mitigation strategies ■ 8 S. Leith, 22. 05. 2021

Challenges and mitigation strategies ■ 8 S. Leith, 22. 05. 2021

Status Ø Currently in the learning phase: Sample preparation procedures, sputtering and microstructural analysis

Status Ø Currently in the learning phase: Sample preparation procedures, sputtering and microstructural analysis methods to be learnt in parallel. Just begun. Ø Initial samples foreseen as soon as possible: The production of worthwhile samples will take some time due to the learning curve. Initial preliminary samples to be produced soon as part of the learning process. 9 S. Leith, 22. 05. 2021

Ngiyabonga! Thank You! EASITrain – European Advanced Superconductivity Innovation and Training. This Marie Sklodowska-Curie

Ngiyabonga! Thank You! EASITrain – European Advanced Superconductivity Innovation and Training. This Marie Sklodowska-Curie Action (MSCA) Innovative Training Networks (ITN) has received funding from the European Union’s H 2020 Framework Programme under Grant Agreement no. 764879