Speaker
Description
High power of RF energy fed into single cavities is needed for state-of-the-art particle accelerator facilities and their upgrades. Delivering this from a single tube-based source, such as klystrons, tetrodes or IOTs, is generally possible but bears the risk of a single point of failure. Additionally, tube technology is obsolete and availability on the market continuously decreasing. Solid-state power amplifier based on transistor technology has advantages, such as the implementation of redundancy for compensation of failed units and improved system control via software. The overall wall-plug efficiency can also be superior.
These advantages are key driving factors of changing the RF sources at accelerator facilities from tube technologies to transistor-based systems. But combining multiple transistors is necessary and key for providing the required RF power into the cavities. Here, we introduce a sequential combining based on our solid state power amplifier system architecture delivering up to 120kW RF power at 500MHz.
The combination and interplay of totally 144 LDMOS transistors within one system not only requires adequate phase and amplitude matching for keeping the losses low and the overall efficiency high. It also needs the implementation of a superior software control for exploiting the full potential and advantages of this solid state technology as particle accelerating RF source.
In this presentation we will report on the challenges for implementation and setting up the hardware and software control of this system.
The machine has been delivered in Q3 2023 to the PETRA III synchrotron.
