Speaker
Description
Beam diagnostic systems are crucial for the Hefei Advanced Light Facility (HALF), a fourth-generation light source under construction. However, the testing of its key devices—such as Digital Beam Position Monitors (DBPMs), the Fast Orbit Feedback (FOFB) system, and Bunch-by-Bunch (BbB) processors—is limited by the lack of a laboratory signal generator capable of simulating accelerator physics, which prevents comprehensive closed-loop testing before installation.
To address this, we develop an RFSoC-based hardware simulator featuring two input ports for feedback signals and four output ports with independently adjustable signal amplitudes and synchronous triggers. It integrates a simplified physics model to generate realistic, wideband beam signals with a pulse width of approximately 2 ns, enabling low-cost, repeatable testing without an actual beam. The system quantizes real bunch signals, simulates transverse/longitudinal oscillations in an FPGA, and outputs specific waveforms upon a 624.75 kHz trigger. By modeling feedback effects and beam dynamics, it also produces signals closely resembling those expected during actual operation in HALF.
This simulator assists in designing and optimizing beam feedback algorithms while reducing development difficulty for DBPM and BbB systems. Crucially, it fulfills application needs by enabling previously impossible lab tests—such as evaluating BbB algorithms and measuring FOFB latency/bandwidth—before the beam is ready.
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