A systematic investigation of radiation collapse for disruption avoidance and prevention on JET tokamak

作     者：R.Rossi M.Gelfusa T.Craciunescu L.Spolladore I.Wyss E.Peluso J.Vega C.F.Maggi J.Mailloux M.Maslov A.Murari on behalf of JET Contributors JET

作者机构：Department of Industrial EngineeringUniversity of Rome“Tor Vergata”via del Politecnico 1RomaItaly National Institute for LaserPlasma and Radiation PhysicsMagurele-BucharestRomania Laboratorio Nacional de FusiónCIEMATAv.Complutense 4028040 MadridSpain UKAEA-CCFECulham Science CentreAbingdon OX143DBUnited Kingdom Consorzio RFX(CNRENEAINFNUniversitàdi PadovaAcciaierie Venete SpA)Corso Stati Uniti 435127 PadovaItaly Istituto per la Scienza e la Tecnologia dei PlasmiCNRPadovaItaly EUROfusion ConsortiumJETCulham Science CentreAbingdon OX143DBUnited Kingdom 

出 版 物：《Matter and Radiation at Extremes》 (极端条件下的物质与辐射（英文）)

年 卷 期：2023年第8卷第4期

页      面：55-75页

核心收录：

学科分类：082704[工学-辐射防护及环境保护] 08[工学] 0827[工学-核科学与技术] 

基　　金：funded by the European Union via the Euratom Research and Training Programme (Grant Agreement) 

主　　题：tokamak prevention approaching 

摘      要：To produce fusion reactions efficiently,thermonuclear plasmas have to reach extremely high temperatures,which is incompatible with their coming into contact with material *** of plasmas using magnetic fields has progressed significantly in the last years,particularly in the tokamak ***,all tokamak devices,and particularly metallic ones,are plagued by catastrophic events called *** disruptions are preceded by anomalies in the radiation patterns,particularly in ITER-relevant *** specific forms of radiation emission either directly cause or reveal the approaching collapse of the *** the localization of these radiation anomalies in real time requires an innovative and specific elaboration of bolometric measurements,confirmed by visible cameras and the inversion of sophisticated tomographic *** information derived from these measurements can be interpreted in terms of local power balances,which suggest a new quantity,the radiated power divided by the plasma internal energy,to determine the criticality of the plasma *** with robust indicators of the temperature profile shape,the identified anomalous radiation patterns allow determination of the sequence of macroscopic events leading to disruptions.A systematic analysis of JET campaigns at high power in deuterium,full tritium,and DT,for a total of almost 2000 discharges,proves the effectiveness of the *** warning times are such that,depending on the radiation anomaly and the available actuators,the control system of future devices is expected to provide enough notice to enable deployment of effective prevention and avoidance strategies.