Basic Electropolishing Process Research and Development in Support of Improved Reliable Performance SRF Cavities for the Future Accelerator

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Future accelerators require unprecedented cavity performance, which is strongly influenced by interior surface nanosmoothness. Electropolishing is the technique of choice to be developed for high-field superconducting radiofrequency cavities. Electrochemical impedance spectroscopy (EIS) and related techniques point to the electropolishing mechanism of Nb in a sulfuric and hydrofluoric acid electrolyte of controlled by a compact surface salt film under F- diffusion-limited mass transport control. These and other findings are currently guiding a systematic characterization to form the basis for cavity process optimization, such as flowrate, electrolyte composition and temperature. This integrated analysis is expected to provide optimum EP parameter sets for ... continued below

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H. Tian, C.E. Reece,M.J. Kelley May 1, 2009.

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Future accelerators require unprecedented cavity performance, which is strongly influenced by interior surface nanosmoothness. Electropolishing is the technique of choice to be developed for high-field superconducting radiofrequency cavities. Electrochemical impedance spectroscopy (EIS) and related techniques point to the electropolishing mechanism of Nb in a sulfuric and hydrofluoric acid electrolyte of controlled by a compact surface salt film under F- diffusion-limited mass transport control. These and other findings are currently guiding a systematic characterization to form the basis for cavity process optimization, such as flowrate, electrolyte composition and temperature. This integrated analysis is expected to provide optimum EP parameter sets for a controlled, reproducible and uniform surface leveling for Nb SRF cavities.

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  • PAC09, 4-8 May 2009, Vancouver, BC, Canada

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  • Report No.: JLAB-ACC-09-1132
  • Report No.: JLAB-ACC-09-1132
  • Grant Number: AC05-06OR23177
  • Office of Scientific & Technical Information Report Number: 1021883
  • Archival Resource Key: ark:/67531/metadc833324

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  • May 1, 2009

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 2:48 p.m.

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H. Tian, C.E. Reece,M.J. Kelley. Basic Electropolishing Process Research and Development in Support of Improved Reliable Performance SRF Cavities for the Future Accelerator, article, May 1, 2009; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc833324/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.