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Title: MECHANICAL FEATURES OF THE rf SYSTEM FOR THE BERKELEY 88-INCH CYCLOTRON

Technical Report ·
OSTI ID:4747137

Four features are described: the movable-panel drive system, ceramic ball bearings, rf hinges, and dee construction. The rf tuning is accomplished by varying the volume between the dee stem and six movable paneis. Power to move the panels is supplied by four hydraulic cylinders. The hydraulic drive mechanism and control system are described. A special ceramic ball bearing, with alumina balls and stainless steel races, was developed. It operates in the presence of high vacuum, rf field, and radiation without organic lubrication. Bearing construction and test results are described. The rf currentcarrying hinges between the movable panels were designed to optimize the hinge thickness and length so that bending stresses and temperature rise were minimized. Graphs showing the relations between hinge thickness, length bending stress, and temperature rise are presented, together with hinge configuration. The dee-stem and dee structure is approximately 14 ft long and weighs 2800 lb. Support for the entire assembly is provided by cantilevering it from the rear of the resonator tank. Materials and fabrication procedure for the dee panel structure are described. (auth)

Research Organization:
California. Univ., Berkeley. Lawrence Radiation Lab.
DOE Contract Number:
W-7405-ENG-48
NSA Number:
NSA-17-007347
OSTI ID:
4747137
Report Number(s):
UCRL-10065
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-63
Country of Publication:
United States
Language:
English