Observation of trapped and passing runaway electrons by infrared camera in the EAST tokamak

• 作者: Yong-Kuan Zhang Rui-Jie Zhou Li-Qun Hu Mei-Wen Chen Yan Chao Jia-Yuan Zhang Pan Li
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES
• 页码范围: 576-583
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/abd758

摘要

In EAST,synchrotron radiation is emitted by runaway electrons in the infrared band,which can be observed by infrared cameras.This synchrotron radiation is mainly emitted by passing runaway electrons with tens of MeV energy.A common feature of radiation dominated by passing runaway electrons is that it is strongest on the high field side.However,the deeply trapped runaway electrons cannot reach the high field side in principle.Therefore,in this case,the high field side radiation is expected to be weak.This paper reports for the first time that the synchrotron radiation from trapped runaway electrons dominates that from passing runaway electrons and is identifiable in an image.Although the synchrotron radiation dominated by trapped rtmaway electrons can be observed in experiment,the proportion of trapped runaway electrons is very low.