S0 Tight Loop Studies on ICHIRO 9-Cell Cavities

Conference · Sun Nov 01 00:00:00 EDT 2009

OSTI ID:1115727

Furuta, Fumio ^[1]; Konomi, T. ^[1]; Saito, Kenji ^[1]; Bice, Damon ^[2]; Crawford, Anthony C. ^[3]; Geng, Rongli ^[3]

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1. KEK
2. Fermilab
3. JLAB

We have continued high gradient R&D of ICHIRO 9-cell cavities at KEK. ICHIRO 9-cell cavity #5 (I9#5) that has no end groups on beam tube to focus on high gradient sent to Jlab as S0 tight loop study. Surface treatments and vertical test were repeated 3 times at Jlab, and then I9#5 sent back to KEK. We also repeated surface treatments and test at KEK. Maximum gradients were 36.5MV/m at Jlab, and 33.7MV/m at KEK so far. Now we are struggling with the puzzle why the results of singles do not work well on 9-cell cavities.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1115727
• Report Number(s): JLAB-ACC-09-1061; DOE/OR/23177-1097
• Resource Relation: Conference: SRF2009, Sept 20-25 2009, Berlin, Germany
• Country of Publication: United States
• Language: English

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