Abstract
After the injection of beam into RHIC the beam energy is ramped from 10.8 GeV/u to 108 GeV/u and the beta function of the interaction points is reduced from 10 meters to 1 meter. The set points for magnet power supplies and RF cavities is changed during such ramps in concert. A system of Wave Form Generators (WFGs), interconnected by a Real Time Data Link (RTDL) and Event Link is used to control these devices. RHIC ramps use a two level system of WFGs: one transmits the beam energy and a pseudo variable as functions of time via RTDL. The other calculates the device set points as functions of these RTDL variables. Energy scaling, saturation correction and the wiring of interaction region quadrupoles is performed on the second level. This report describes the configuration and implementation of the software, firmware and hardware of the RHIC ramp system.
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