Development of a novel bunch oscillation recorder with RFSoC technology

TL;DR

This paper introduces a high-precision, RFSoC-based Bunch Oscillation Recorder designed to monitor and analyze beam instabilities in the SuperKEKB accelerator, aiming to mitigate Sudden Beam Loss events and enhance luminosity.

Contribution

The paper presents a novel RFSoC-based Bunch Oscillation Recorder with high spatial resolution, capable of real-time SBL event detection and source identification in the SuperKEKB accelerator.

Findings

Achieved 0.03 mm position resolution for beam monitoring

Successfully recorded multiple SBL events in initial deployment

Demonstrated potential for real-time beam instability analysis

Abstract

The SuperKEKB accelerator is designed to achieve unprecedented luminosity levels, but this goal is currently hindered by Sudden Beam Loss (SBL) events. These events not only obstruct luminosity improvement but also pose a significant risk to accelerator components, the Belle II detectors, and the superconducting focusing system, potentially leading to severe damage and quenching of the superconducting system. To address this critical challenge, we have developed a novel Bunch Oscillation Recorder (BOR) based on RFSoC technology. The BOR has demonstrated high precision with a position resolution of 0.03 mm, making it a powerful tool for real-time beam monitoring. In its initial deployment, the BOR successfully recorded multiple SBL events, providing valuable data for further analysis. By strategically positioning BORs at the suspected points of SBL origin, we aim to directly identify sources of beam instability. We anticipate that this portable, high-speed BOR monitor will play a crucial role in resolving the SBL issue, ultimately helping achieve SuperKEKB's luminosity targets.