Experiments with lithium limiter on T-11M tokamak and applications of the lithium capillary-pore system in future fusion reactor devices
Experiments with lithium limiter on T-11M tokamak and applications of the lithium capillary-pore system in future fusion reactor devices
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DOI：
10.1088/0741-3335/48/6/009
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发表时间：
2006-06-01
影响因子：
2.2
通讯作者：
Prokhorov, D. Yu
中科院分区：
文献类型：
--
作者：
Mirnov, S. V.;Azizov, E. A.;Prokhorov, D. Yu
本文综述了t - 11m托卡马克上Li限幅器的最新试验结果。锂限制器是基于毛细管-孔隙系统（CPS）的概念。研究了Li侵蚀过程以及Li第一壁对氘（D-2）和氦（He）的吸附。毛细管力的能力，以限制液态锂在CPS限制器中断期间被证明。实现了将锂限制器与薄（0.6 mm） CPS涂层相结合的想法，以解决散热问题。从而实现了持续时间达0.3 s的准稳态托卡马克体系和洁净（Z(eff) = 1）氘等离子体。利用红外辐射计测量了放电过程中锂表面温度的时间变化，并将其重新计算为表面功率负荷。为了估计锂限制器的侵蚀，观察了锂中性离子和离子的谱线发射。发现了由于限制加热导致锂腐蚀的增加。等离子体柱辐射测量的径向分布表明，在高锂流放电期间，在相对较薄（5 cm）的边界层中，总辐射损失高达90%，而在等离子体中心仅占10%。在锂限制温度最高的放电条件下（60 ~ 600℃），可以检测到锂发射的振荡和限制表面温度的锯齿状振荡。提出了一种新型的Li CPS DEMO反应堆第一壁和Li CPS国际热核反应堆限制器实验。
The paper is an overview of recent results of Li limiter testing in T-11 M tokamak. The lithium limiter is based on the capillary-pore system (CPS) concept. The Li erosion process and deuterium (D-2) and helium (He) sorption by Li first wall were investigated. The ability of capillary forces to confine the liquid Li in the CPS limiter during disruption was demonstrated. The idea of combined lithium limiter with thin (0.6 mm) CPS coating as a solution of the heat removal problem was realized. As a result the quasi steady-state tokamak regime with duration up to 0.3 s and clean (Z(eff) = 1) deuterium plasma has been achieved. The temporal evolution of the lithium surface temperature during discharge was measured by a IR radiometer and then was recalculated to the surface power load. For the estimation of the Li limiter erosion the Li neutral and ions spectral line emission were observed. The increase in lithium erosion as a result of limiter heating was discovered. The radial distribution of plasma column radiation measurements showed up to 90% of the total radiation losses in a relatively thin (5 cm) boundary layer and only 10% in a plasma centre during discharges with high Li influx. Oscillations of Li emission and saw-tooth-like oscillations of the limiter surface temperature have been detected in discharge regimes with highest Li limiter temperature (> 600 degrees C). A version of Li CPS first wall of DEMO reactor and Li CPS limiter experiment in the International Thermonuclear Energy Reactor are suggested.