Research on Quasi-in-Situ Calibration Method for Multi-Channel Mismatches in Beam Signal Processors

IF 2.4 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Nuclear Science Pub Date : 2026-10-01 Epub Date: 2026-09-03 DOI:10.1109/TNS.2026.3730092

An Wang;Youming Deng;Xing Yang;Yongbin Leng

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引用次数: 0

Abstract

The multi-channel beam signal acquisition and processing system is a core component of beam position monitoring (BPM) systems and their related diagnostics in particle accelerators. Its channel mismatches directly affect the measurement accuracy of key parameters such as beam position, bunch length, and charge. To address the challenge that existing calibration methods struggle to achieve calibration results consistent with online operation, this article proposes a quasi-in-situ calibration method for multi-channel mismatches based on the beam signal itself. Using the quasi-periodic characteristic of the beam signal, this method employs equivalent-time sampling combined with a waveform reconstruction algorithm to reconstruct the complete waveform for each channel with sufficient time resolution. It precisely calibrates the amplitude gains, time delays, and DC offsets between channels, enabling a correction for the entire analog signal processing chain, including the beam pickups, the signal cables, and the analog front-end (FE) electronics. Numerical simulations are performed to systematically analyze the influence of channel mismatches on the measured beam parameters, and an experimental verification is conducted at Hefei Light Source II (HLS-II) storage ring. The results demonstrate that this method significantly enhances the channel matching of the BPM signal processors in the time and frequency domains, providing a practical and reliable quasi-in-situ calibration method for high-accuracy beam measurements.

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波束信号处理器中多通道失配的准原位标定方法研究

多通道束流信号采集与处理系统是粒子加速器束流位置监测系统及其相关诊断的核心组成部分。它的信道不匹配直接影响波束位置、束长和电荷等关键参数的测量精度。针对现有校准方法难以获得与在线操作一致的校准结果的挑战，本文提出了一种基于波束信号本身的多通道失配准原位校准方法。该方法利用波束信号的准周期特性，采用等效时间采样结合波形重构算法，重构出具有足够时间分辨率的各通道完整波形。它可以精确校准通道之间的幅度增益、时间延迟和直流偏移，从而对整个模拟信号处理链进行校正，包括波束拾取器、信号电缆和模拟前端（FE）电子设备。通过数值模拟系统分析了通道失配对测量光束参数的影响，并在合肥光源II （HLS-II）存储环上进行了实验验证。结果表明，该方法显著提高了BPM信号处理器在时域和频域的信道匹配，为高精度波束测量提供了一种实用可靠的准原位校准方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Nuclear Science 工程技术-工程：电子与电气

CiteScore

3.70

自引率

27.80%

发文量

314

审稿时长

6.2 months

期刊介绍： The IEEE Transactions on Nuclear Science is a publication of the IEEE Nuclear and Plasma Sciences Society. It is viewed as the primary source of technical information in many of the areas it covers. As judged by JCR impact factor, TNS consistently ranks in the top five journals in the category of Nuclear Science & Technology. It has one of the higher immediacy indices, indicating that the information it publishes is viewed as timely, and has a relatively long citation half-life, indicating that the published information also is viewed as valuable for a number of years. The IEEE Transactions on Nuclear Science is published bimonthly. Its scope includes all aspects of the theory and application of nuclear science and engineering. It focuses on instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.