Rongli Geng - Jefferson Lab

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ILC High Gradient Cavity Processing & Testing supported by DOE HEP and US-Japan Collaboration • Program began in summer 2006. 17 Cavities Processed – Critical R&D topic for ILC. – In collaboration with FNAL and KEK. – 90% of 9-cell electropolishing (EP) processed in US. – Significant capability demonstrated - 30 EP & vertical test per year. • Established in-house multi-cell cavity high-grad. expertise – 150 hours of active EP time. Fairly stable cavity results. – Impressive gradient results recognized and valued by ILC & SRF community for future endeavor (later slides). • Potential to benefit JLab future machine emerging – Two example of raising Q at 20 MV/m in 7-cell JLab cavities (more later). Rongli Geng Director's Review, March 20, 2009, Jefferson Lab 2
S0: Cavity gradient R&D S1: Cryomodule development Rongli Geng Director's Review, March 20, 2009, Jefferson Lab 3
Page 1: ILC SRF Cavity High Gradient R&D at
Page 5 and 6: JLab Results Push Gradient Yield En
Page 7 and 8: The ILC Gradient Yield Goal is Chal
Page 9 and 10: Example of Field Emitter Revealed b
Page 11 and 12: Look Forward: Opportunities & Chall
Page 13: Final Remark: An Opportunity for De

Rongli Geng - Jefferson Lab

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