Cavity Design, Fabrication and Commission Performance of a 750MHz, 4-rod Separator for CEBAF 4-Hall Beam Delivery System

Conference · Tue Sep 01 00:00:00 EDT 2015

OSTI ID:1221894

Wang, Haipeng ^[1]; Cheng, Guangfeng ^[1]; Turlington, Larry T. ^[1]; Wissmann, Mark J. ^[1]

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1. Jefferson Lab, Newport News, VA

A short version of the original CEBAF normal conducting 4-rod separator cavity has been developed into a 750MHz one * since the concept of simultaneous 4-hall operation for CEBAF is introduced **. This work has been advanced further based on the EM design optimization, bench measurement and by conducting RF-thermal coupled simulation using CST and ANSYS to confirm the cavity tuning and thermal performance. The cavity fabrication used matured technology like copper plating and machining. The cavity flanges, couplers, tuners and cooling channels adopted consistent/compatible hardware with the existing 500MHz cavities. The electromagnetic and thermal design simulations have greatly reduced the prototyping and bench tuning time of the first prototype. Four production cavities have reached a typical 1.94MV kick voltage or 3.0kW wall loss on each cavity after a minor multipactoring or no processing, 7.5% overhead power than the design specification.

• 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: 1221894
• Report Number(s): JLAB-ACC-15-2027; DOE/OR/23177-3541
• Resource Relation: Conference: IPAC 2015, 3-8 May 2015. Richmond, Virginia, USA
• Country of Publication: United States
• Language: English