4月13日 Developing Disruption Warning Algorithms Using Large Databases on C-Mod, EAST, and DIII-D

　　题目：Developing Disruption Warning Algorithms Using Large Databases on C-Mod, EAST, and DIII-D

　　报告人：Robert Granetz

　　时间：2017年4月13日（周四）上午9:00

　　地点：七室一楼会议室

　　共同作者：R.S. Granetz, C. Rea, R.A. Tinguely

　　MIT Plasma Science and Fusion Center, Cambridge, MA, US

　　D. Chen, Y.M. Duan, S. Gu, X. Gu, Z.P. Luo, J. Qian, B. Shen,

　　B. Wang, B.J. Xiao, F. Yang

　　Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China N. Eidietis, A. Leonard General Atomics, San Diego, CA, US

　　摘要：

　　In order to mitigate disruptions, we must first be able to predict, in real time, if a disruption will be happening soon.  We also want to know if one universal disruption prediction algorithm can work on multiple tokamaks.  Toward this goal, we have developed large databases from 1000’s of discharges on C-Mod, EAST, and DIII-D, containing disruption-relevant signals vs time for both disruptive and non-disruptive plasmas.  These databases are being used to learn which plasma parameters are useful for predicting disruptions, and to develop machine learning algorithms for disruption prediction.

　　In this presentation I will focus on two sub-topics:

　　1)  Comparison of several plasma parameters on EAST and C-Mod, showing that disruption warning signals behave differently on the two machines

　　2)  Machine learning: decision trees and random forests for disruption prediction using the DIII-D database

　　授课人介绍：Robert Granetz is a research scientist in the Alcator group at the MIT Plasma Science and Fusion Center. Much of his research over the last few years has concentrated on disruptions and mitigation."

　　欢迎感兴趣的人员参加！