Speaker
Description
FRIB is commissioning a 120 kW, 80.5 MHz solid-state RF amplifier for the RFQ cavity to increase overall system availability. Although reliability of the tetrode amplifier was greatly improved during commissioning and early operations, some potential failures may have long repair times. In contrast, solid-state amplifiers have shorter repair time due to the modular design and no high voltage. The RFQ solid state amplifier will use the same technology as FRIB linear segment 1, which reduces the effort for development of new controls and maintenance procedures, and allows sharing of spares. Each of the eight racks includes six amplifier modules for a total of 15 kW per rack; and the system uses 3 dB hybrid couplers in a 3-stage corporate power combining scheme to achieve 120 kW. The paper will describe the RFQ solid-state amplifier design and commissioning; as well as other 2-way and 3-way combined amplifier systems at FRIB.
