中国物理B ›› 2023, Vol. 32 ›› Issue (7): 75203-075203.doi: 10.1088/1674-1056/acc7fc
所属专题: SPECIAL TOPIC — Plasma disruption
Wei Zheng(郑玮)1, Fengming Xue(薛凤鸣)1,2, Zhongyong Chen(陈忠勇)1,†, Chengshuo Shen(沈呈硕)1, Xinkun Ai(艾鑫坤)1, Yu Zhong(钟昱)1, Nengchao Wang(王能超)1, Ming Zhang(张明)1, Yonghua Ding(丁永华)1, Zhipeng Chen(陈志鹏)1, Zhoujun Yang(杨州军)1, and Yuan Pan(潘垣)1
Wei Zheng(郑玮)1, Fengming Xue(薛凤鸣)1,2, Zhongyong Chen(陈忠勇)1,†, Chengshuo Shen(沈呈硕)1, Xinkun Ai(艾鑫坤)1, Yu Zhong(钟昱)1, Nengchao Wang(王能超)1, Ming Zhang(张明)1, Yonghua Ding(丁永华)1, Zhipeng Chen(陈志鹏)1, Zhoujun Yang(杨州军)1, and Yuan Pan(潘垣)1
摘要: Predicting disruptions across different tokamaks is necessary for next generation device. Future large-scale tokamaks can hardly tolerate disruptions at high performance discharge, which makes it difficult for current data-driven methods to obtain an acceptable result. A machine learning method capable of transferring a disruption prediction model trained on one tokamak to another is required to solve the problem. The key is a feature extractor which is able to extract common disruption precursor traces in tokamak diagnostic data, and can be easily transferred to other tokamaks. Based on the concerns above, this paper presents a deep feature extractor, namely, the fusion feature extractor (FFE), which is designed specifically for extracting disruption precursor features from common diagnostics on tokamaks. Furthermore, an FFE-based disruption predictor on J-TEXT is demonstrated. The feature extractor is aimed to extracting disruption-related precursors and is designed according to the precursors of disruption and their representations in common tokamak diagnostics. Strong inductive bias on tokamak diagnostics data is introduced. The paper presents the evolution of the neural network feature extractor and its comparison against general deep neural networks, as well as a physics-based feature extraction with a traditional machine learning method. Results demonstrate that the FFE may reach a similar effect with physics-guided manual feature extraction, and obtain a better result compared with other deep learning methods.
中图分类号: (Tokamaks, spherical tokamaks)