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arXiv 2102.00786physics.acc-phcs.LGeess.SP
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一种新的粒子加速器时间序列分类与预测方法

A Novel Approach for Classification and Forecasting of Time Series in Particle Accelerators

Paul Scherrer Institut(保罗·谢尔研究所);Swiss Data Science Center(瑞士数据科学中心);ETH Zürich(苏黎世联邦理工学院);EPFL(洛桑联邦理工学院)

Sichen Li, Mélissa Zacharias, Jochem Snuverink, Jaime Coello de Portugal, Fernando Perez-Cruz, Davide Reggiani, Andreas Adelmann

摘要:

粒子加速器的束流中断(联锁)尽管是必要的安全措施,但会导致突然的操作变化和束流时间的大量损失。提出了一种新的时间序列分类方法,通过预测联锁事件来减少强流质子加速器复合体中的束流时间损失。预测是通过对多变量时间序列的窗口进行二进制分类来实现的。将时间序列转换为递归图,然后通过卷积神经网络进行分类,该网络不仅捕获了时间序列的内部结构,而且还利用了图像分类技术的进步。与随机森林模型的$0.65 \pm 0.01$相比,我们性能最佳的联锁至稳定分类器的ROC曲线下面积值为$0.71 \pm 0.01$,并且它可以潜在地将每次联锁的射束时间损失减少$0.5 \pm 0.2$秒。

英文摘要:

The beam interruptions (interlocks) of particle accelerators, despite being necessary safety measures, lead to abrupt operational changes and a substantial loss of beam time. A novel time series classification approach is applied to decrease beam time loss in the High Intensity Proton Accelerator complex by forecasting interlock events. The forecasting is performed through binary classification of windows of multivariate time series. The time series are transformed into Recurrence Plots which are then classified by a Convolutional Neural Network, which not only captures the inner structure of the time series but also utilizes the advances of image classification techniques. Our best performing interlock-to-stable classifier reaches an Area under the ROC Curve value of $0.71 \pm 0.01$ compared to $0.65 \pm 0.01$ of a Random Forest model, and it can potentially reduce the beam time loss by $0.5 \pm 0.2$ seconds per interlock.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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