The Proton Storage Ring (PSR) at the Los Alamos Neutron Science Center (LANSCE) accumulates a 625-μs-long beam and compresses it into a 290-ns-long (base-to-base) short pulse for delivery to the Lujan Center. Due to its high-intensity operation, the PSR also functions as a highly-sensitive mass spectrometer for the entire accelerator complex. Changes in PSR beam losses are more responsive to linac drifts than any other diagnostic system, making continuous monitoring and characterization of the PSR critical to overall performance. Currently, PSR operation is primarily guided by beam loss signals, while key physics parameters—such as the betatron tune, closed orbit, and injection offsets—are typically measured only once per day. Furthermore, Beam Position Monitors (BPMs) can only provide meaningful data a single 290-ns-long injection, requiring dedicated machine time and resulting in operational downtime. However, recent upgrades to both the data acquisition and chopper systems now enable continuous measurements during standard operation. In this work, we employ a Convolutional Neural Network (CNN) trained on simulated data to infer critical beam parameters in real-time. This approach will be tested and implemented during the 2025 run cycle to enable online monitoring and improved control of PSR beam dynamics.
Leon et al. (Thu,) studied this question.