Limitations for tungsten as plasma facing material in the diverse scenarios of the European inertial confinement fusion facility HiPER: Current status and new approaches  

作　　者：R.Gonzalez-Arrabal A.Rivera J.M.Perlado 

机构地区：[1]Instituto de Fusi´on Nuclear Guillermo Velarde y Departamento de Ingenier´ıa Energ´etica,ETSII Universidad Polit´ecnica de Madrid,E-28006 Madrid,Spain

出　　处：《Matter and Radiation at Extremes》2020年第5期52-72,共21页极端条件下的物质与辐射（英文）

基　　金：This research was supported by Comunidad de Madrid(Grant No.S2018/EMT-4437);the Ministerio de Economıa y Competitividad of Spain(Grant No.PID2019-105325RB-C32)(Radiafus-V);EUROFUSION(WPENR:Enabling Research;Grant No.ENRIFE19.CCFE-01).

摘　　要：The high-power laser energy research(HiPER)project was a European project for demonstrating the feasibility of inertial fusion energy based on using direct-drive targets in a shock ignition scheme using a drywall evacuated chamber.HiPER was intended to drive the transition from a scientific proof of principle to a demonstration power plant in Europe.The project was divided into three realistic scenarios(Experimental,Prototype,and Demo)to help identify open problems and select appropriate technologies to solve them.One of the problems identified was the lack of appropriate plasma-facing materials(PFMs)for the reaction chamber.Therefore,a major challenge was to develop radiation-resistant materials able to withstand the large thermal loads and radiation in these reactors.In this paper,we describe the main threats that coarse-grained Wwould face in the diverse HiPER scenarios.Based on purely thermomechanical considerations,theWlifetimes for the HiPER Prototype and Demo scenarios are limited by fatigue to 14000 h and 28 h,respectively.The combined effects of thermal load and atomistic damage significantly reduce these lifetimes to just∼1000 shots for the Experimental scenario and a few minutes and seconds for the Prototype and Demo scenarios,respectively.Thus,coarse-grainedWis not an appropriatePFMfor the Prototype or Demo scenarios.Therefore,alternatives to this material need to be identified.Here,we review some of the different approaches that are being investigated,highlight the work done to characterize these new materials,and suggest further experiments.

关 键 词：diverse purely PROOF 

分 类 号：TG146.411[一般工业技术—材料科学与工程]