The design and R&D work of EAST tungsten divertor
The design and R&D work of EAST tungsten divertor
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DOI：
10.1109/sofe.2013.6635294
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发表时间：
2013-06
期刊：
影响因子：
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通讯作者：
Zibo Zhou;D. Yao;Lei Cao;Chao Liang
中科院分区：
文献类型：
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作者：
Zibo Zhou;D. Yao;Lei Cao;Chao Liang
EAST托卡马克是世界上最先进的全超导托卡马克之一。为了获得更好的等离子体参数，在2013年的更新中计算并优化了新的等离子体位置和形状。应设计和开发新的偏滤器以承受小于10 MW/m2的更高热流密度。偏滤器是一个类似ITER的结构。它基于单块和盒式技术。偏滤器由PFC装置、暗盒和支持系统组成。偏滤器靶板PFC单元采用整体式结构，导流板和整流罩采用W型平板瓦。箱体不仅作为PFC单元的支撑，而且还作为单元的冷却通道。支撑系统包括内支撑轨、外支撑轨和辅助支撑。系统安装在真空容器上，然后才放上暗盒。当暗盒与支撑系统组装时，只需将暗盒抬起并向前推进。为了优化和验证偏滤器的结构，对偏滤器进行了研究和开发工作。制作了不同位置的PFC单元和不同制造工艺的盒的原型。利用这些样机在模拟装置和真空容器上模拟了装配过程。结果表明，偏滤器系统能够按照图纸要求成功制造。并且可以方便、精确地安装在托卡马克装置上。所有的研发工作和试验将证明偏滤器的设计是正确的。
EAST tokamak is one of the advanced full superconducting tokamaks in the world. To achieve better plasma parameters, new plasma position and shape are calculated and optimized in the 2013's update. New divertors should be deigned and developed to endure higher heat flux less than 10MW/m2. The divertor is ITER-like structure. It bases on mono-block and cassette technology. The divertor is composed of PFC units, cassettes and support systems. Mono-block structures are just employed on the PFC units of target plates of the divertors, thus W flat tiles are used on the baffles and dome. Cassettes act as not only the supports of the PFC units, but also the cooling channels of the units. The support systems consist of inner support rails, outer support rails and auxiliary braces. The systems are installed on vacuum vessel before cassettes putting on. When cassette assembly with support system, it is just lifted and pushed forward. To optimize and verify the structure, R&D work has done on the divertor. The prototypes of PFC units in different positions and cassettes with different manufacture processes are fabricated. The assembly process is also simulated with these prototypes on mimic facility and vacuum vessel. The results show that the divertor system can be manufactured successfully according to the drawing requirements. And they can also be installed conveniently and precisely on the tokamak. All R&D work and tests will certify that the design of divertor is all right.