arXiv:2507.07109physics.ins-detcs.LG2025-07被引 1

用深度学习加速核物理谱仪的电荷态分析,效率提升百倍。

Analysis of Atomic Charge State and Atomic Number for VAMOS++ Magnetic Spectrometer using Deep Neural Networks and Fractionally Labelled Events

  • 用少量标注数据训练神经网络,自动识别离子电荷态与原子序数。
  • 分析时间从数月缩短至数小时,结果更准确且可复现。
  • 适合高精度核物理实验数据分析人员使用。

VAMOS++磁谱仪是一种多参数系统,结合磁光学元件与多探测器阵列,通过轨迹重建方法测量磁刚度、轨迹长度,进而获得速度和质荷比。分段电离室提供能量信息,用于分析原子电荷态与原子序数。然而,由于电离室入口窗厚度变化及探测器不均匀性等固有缺陷,传统分析极为繁琐,常需数月完成。本文提出一种新方法:利用深度神经网络,在仅少量精确标注的低电荷态或高分辨电荷态事件上训练,使网络能自主、准确分类剩余事件。该方法显著加速高分辨率电荷态与原子序数谱的获取,将分析时间从数月压缩至数小时。关键在于消除人为偏差,实现标准化、最优且可重复的结果,效率空前提升。

原文摘要 · Abstract (English)

The VAMOS++ magnetic spectrometer is a multi-parametric system that integrates ion optical magnetic elements with a multi-detector stack. The magnetic elements, along with the tracking and timing detectors and the trajectory reconstruction method, provide the analysis of the magnetic rigidity, the trajectory length between the beam interaction point and the focal plane of the spectrometer, and the related velocity and mass-over-charge ratio. The segmented ionization chamber provides the energy measurements necessary to analyze the atomic charge state and atomic number. However, this analysis critically suffers from inherent limitations due to the variable thickness and non-uniformity of the entrance window of the ionization chamber and other detector imperfections. Conventionally, this meticulous, detailed analysis is exceptionally tedious, often requiring several months to complete. We present a novel method utilizing deep neural networks, trained on an experimental dataset with only a small fraction of precisely labeled events for the lowest and best-resolved atomic charge states or numbers. This innovative approach enables the networks to autonomously and accurately classify the remaining events. This method drastically accelerates the acquisition of high-resolution atomic charge state and atomic number spectra, reducing analysis time from months to mere hours. Crucially, by discarding human bias, this approach ensures standardized, optimal, and reproducible results with unprecedented efficiency.

核物理深度学习谱仪分析

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