Next-Gen RF System for Particle Accelerators

This paper details the development and integration of a next-generation Low-level RF (NG-LLRF) control and monitoring system for S-band accelerating structures. The system utilizes an RF system-on-chip (RFSoC) to directly sample and synthesize RF pulses, eliminating the need for traditional analog mixers. This approach offers improved performance, flexibility, and affordability, addressing the stringent requirements of future particle accelerators. The NG-LLRF system has demonstrated performance exceeding the demands of targeted applications, including upgrades to the Next Linear Collider Test Accelerator (NLCTA) and test facilities at SLAC.

A custom solid-state amplifier (SSA) was also developed to deliver RF pulses at the required power level. The integration of the LLRF with the SSA and the high-power test facility presented significant challenges, requiring careful optimization of power levels and RF pulse stability at each stage of the RF drive system. The paper summarizes, analyzes, and discusses the integration procedure and test results at each stage, highlighting the essential steps for full deployment of the NG-LLRF system to various test facilities and accelerators across different frequency bands. This advancement represents a significant step forward in the development of high-precision control systems for particle accelerators.

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