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Exploring RF Superconducting Cavities: Challenges and Innovations in Cavity Feasibility

This document discusses the feasibility of RF superconducting cavities, focusing on reproducibility, manufacturing effects, and dominant phenomena. It highlights a UK consortium collaborating with MUCOOL, including Imperial College, Cockcroft Institute, and Liverpool University. Key studies involve the analysis of 300 SC cavities at 200 MHz or over 40 SC cavities at 200 MHz with a target gradient of 17 MV/m and Q0 exceeding 6×10^9. Experts, including Matt Stables and Arash Zarrebini-Esfahani, will address surface characterization and modeling requirements, respectively, while examining the impact of thin films on cavity performance.

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Exploring RF Superconducting Cavities: Challenges and Innovations in Cavity Feasibility

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  1. RF Structures in a NF...... or Where’s my flying car..........

  2. A number of questions exist about cavity feasibility • Reproducibility • Effects of manufacture • Dominate phenomena U.K. Consortium working in collaboration with MUCOOL; • Imperial College , Cockcroft Institute, Liverpool University • This work will be discussed by: • Matt Stables – Surface Characterisation • Arash Zarrebini-esfahani – Modelling

  3. NF Requirements: • 300 SC cavities at 200 MHz (study 2a) • or > 40 SC cavities at 200 MHz (RLA-FFAG) • > 17 MV/m at a Q0 of > 6×109 R.L.Geng, PAC 2003 R.L.Geng, PAC 2003

  4. CERN, IPJ-Swierk, DESY, LNL-INFN, Lancs, CEA-Saclay, IPNO-IN2P£ FP7 – EuCard Thin Films Examining phenomena limit current performance and investigating alternative coating techniques Several mechanisms for the thin film Q-drop[i]ii],[iii]; High Rinterface Low Nb [i]E. Palmieri, "Q-Drop: an Analysis Starting from Elementary Fundamental Theory", 12th Workshop on RF Superconductivity, Ithaca USA (2005) - TuA02 [ii]J. Halbritter et al., "RF Residual Losses, High Electric and Magnetic RF Fields in Superconducting Cavities", 38th Eloisatron Project Workshop, Erice ITALY (1999) [iii]V. Arbet-Engels et al., "Superconducting Nb Cavities, a Case for the Film Technology", NIM A 463, p. 1-8 (2001)

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