Development of lithium and tungsten limiters for test on T-10 tokamak at high heat load condition

10th International School-Conference on Materials for Extreme Environment: Development, Production and Application

Lyublinski, I.E.^1,2 ; Vertkov, A.V.^1 ; Zharkov, M Yu^1 ; Vershkov, V.A.^3 ; Mirnov, S.V.^2

Joint Stock Company RED STAR, Elektrolitny proezd , la, Moscow

115230, Russia^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe highway, 31, Moscow

115409, Russia^2

National Research Center, Kurchatov Institute, Kurchatov sqv. 1, Moscow

123182, Russia^3

关键词: Capillary force;    Capillary porous systems;    Normal operations;    Plasma facing materials;    Plasma facing surfaces;    Porous matrixs;    Power deposition;    Vacuum chambers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/130/1/012019/pdf
DOI  :  10.1088/1757-899X/130/1/012019

来源: IOP

【 摘 要 】

Application of a complex of powerful (up to 3 MW) ECR plasma heating in T-10 tokamak is pulled down with a problem of the strong plasma pollution at power input more than 2 MW. For the solution of these problems the new W and Li limiters is developed and prepared to implementation. As it is supposed, application of W as a plasma facing material will allow excluding carbon influx into vacuum chamber. An additional Li limiter arranged in a shadow of W one will be used as a Li source for plasma periphery cooling due to a reradiation on Li that will lead to decrease in power deposition on W limiters. Parameters and design of limiters are presented. Plasma facing surface of a limiter is made of capillary-porous system (CPS) with Li. Porous matrix of CPS (W felt) provides stability of liquid Li surface under MHD force effect and an opportunity of its constant renewal due to capillary forces. The necessary Li flux from a Li limiter surface is estimated for maintenance of normal operation mode of W limiters at ECRH power of 3 MW during 400 ms. It is shown, that upgrade of limiters in tokamak T-10 will allow providing of ECR plasma heating with power up to 3 MW at reasonable Li flux.