Low-level RF system design for the Accelerator Test Facility (ATF) damping ring

The ATF damping ring was built to demonstrate the production of low emittance, high current beams for future linear colliders. To attain high beam currents, multiple high current bunch trains are required. The low-level RF system should be designed to minimize both steady-state and transient beam loading effects in the accelerating cavities. In addition the design should be sufficiently flexible to allow for a variety of beam dynamics tests which require a wide range of beam currents and cavity voltages. The low-level RF system and stability boundaries for reduced power and full power operation are discussed in this paper