I. Jepu, A. Widdowson, Guy Matthews, J. Coad, J. Likonen, S. Brezinsek, M. Rubel, G. Pintsuk, Per Petersson, E. Fortuna-Zalesna, Justyna Grzonka, C. Porosnicu, P. Dinca, O. Pompilian, B. Butoi, Sorin Georgian Moga, S. Silburn, Slava Kuksenko, Eduardo Alves, N. Catarino, R. Pitts, Lei Chen, S. Ratynskaia
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引用次数: 0
摘要
欧洲联合环(JET)聚变反应堆于 2011 年升级为金属壁结构,包括主室的散装铍(Be)瓦和岔道的散装钨(W)和 W 涂层氟氯化碳瓦[1]。在每次活动中,都观察到一系列器壁损坏,包括位于器壁顶部的上倾板(UDP)和内壁上的损坏--主要影响内壁防护限位器(IWGL)。在这两种情况下,得出的结论是,这些损坏的原因是未减轻的等离子体破坏。在采用金属壁结构的 JET 中,大多数等离子体破坏都是有意造成的。总体目标是研究这些现象的行为,以评估它们对金属壁的影响,加深对材料形态变化的理解,并在此基础上开发、实施和测试缓解技术,以便在国际热核实验堆上使用。目前的结果提供了关于未缓解等离子体扰动对 UDP 影响的更多信息,是对 [2] 中工作的重要扩展,[2] 中强调了 JET Be 顶部限流器经过三次运行后的损坏规模。此外,还提供了关于高能失控电子对 JET Be IWGL 的破坏作用的新数据。
Overview of damage to beryllium limiters by unmitigated disruptions and runaway electrons in the JET tokamak with metal walls
The Joint European Torus (JET) fusion reactor was upgraded to the metallic wall configuration in 2011 which consisted of bulk beryllium (Be) tiles in the main chamber and bulk tungsten (W) and W-coated CFC tiles in the divertor [1]. During each campaign, a series of wall damages were observed; on the upper dump plates (UDP) positioned to the top part of the vessel walls and on the inner wall - mainly affecting the inner wall guard limiters (IWGL). In both cases, it was concluded that the causes of these damages were unmitigated plasma disruptions. In the case of JET with the metallic wall configuration, most of these plasma disruptions were intentionally provoked. The overall objective was to study the behaviour of these phenomena, in order to assess their impact on the wall, improve understanding of morphological material changes, and – based on that - to develop, implement and test mitigation techniques for their prospective use on ITER. The current results bring additional information on the effects of the unmitigated plasma disruptions on the UDPs and are a significant extension of work presented in [2] where the scale of the damage after three operational campaigns on the Be top limiters of JET was highlighted. In addition, new data is presented on the damaging effect that the high energetic runaway electrons had on the Be IWGL in JET.
期刊介绍:
Nuclear Fusion publishes articles making significant advances to the field of controlled thermonuclear fusion. The journal scope includes:
-the production, heating and confinement of high temperature plasmas;
-the physical properties of such plasmas;
-the experimental or theoretical methods of exploring or explaining them;
-fusion reactor physics;
-reactor concepts; and
-fusion technologies.
The journal has a dedicated Associate Editor for inertial confinement fusion.