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U.S. Department of Energy
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CEBAF (Continuous Electron Beam Accelerator Facility) superconducting cavity rf drive system

Conference ·
OSTI ID:6286369

The CEBAF rf system consists of 418 individual rf amplifier chains. Each superconducting cavity is phase locked to the master drive reference line to within 1 degree, and the cavity field gradient is regulated to within 1 part in 10/sup 4/ by a state-of-the-art rf control module. Precision, continuously adjustable, modulo 360/sup 0/ phase shifters are used to generate the individual phase references, and a compensated rf detector is used for level feedback. The close coupled digital system enhances system accuracy, provides self-calibration, and continuously checks the system for malfunction. Calibration curves, the operating program, and system history are stored in an on board EEPROM. The rf power is generated by a 5kW, water cooled, permanent magnet focused klystron. The klystrons are clustered in groups of 8 and powered from a common supply. rf power is transmitted to the accelerator sections by semiflexible waveguide.

Research Organization:
Continuous Electron Beam Accelerator Facility, Newport News, VA (USA)
DOE Contract Number:
AC05-84ER40150
OSTI ID:
6286369
Report Number(s):
DOE/ER/40150-20; CEBAF-PR-87-005; CONF-870302-201; ON: DE87008663
Country of Publication:
United States
Language:
English