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超蒸发冷却概念是目前最有前景的强化换热技术之一,能够承载20~30 MW/m~2的高热负荷。大型托卡马克如欧洲联合环(Joint European torus, JET)等装置均对超蒸发技术开展了大量的研发或应用尝试,同时国际热核聚变试验堆(International thermonuclear experimental reactor,ITER)偏滤器的穹顶(Dome)面向等离子体部件已经计划采用超蒸发强化换热的冷却结构。本文首先详细介绍了JET和ITER的超蒸发部件研发历程,然后,参考JET和ITER的设计,为中国聚变工程试验堆(Chinese fusion engineering test reactor,CFETR)设计了一种新型结构的超蒸发强化换热面向等离子体部件,并开展了部件制备工艺的摸索以及高热负荷测试,部件在高热负荷测试过程中表现出了优异的换热性能。 相似文献
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Fuel retention and recycling in plasma facing materials is a crucial issue for fusion devices, especially for the long pulse discharge devices. In this work, the deuterium retention and the surface erosion of SiC-coated graphite tiles exposed to EAST plasmas have been studied by post-mortem analyses, i.e., thermal desorption spectroscopy (TDS), secondary ion mass spec- troscopy (SIMS) and scanning electron microscopy (SEM). The results show that the sample cut from the high field side (HF) tile has been intensely eroded due to deuterium bombardment on plasma facing surfaces in the initial phase of discharges and trapped highest amount of deuterium. Lower deuterium retention has been found in the inner divertor sample, which is presumably due to the particular exposure history in the 2010 spring campaign. 相似文献
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针对聚变装置中钨材料的性能评价问题,采用四点弯曲试验(4PBT)方法对钨材料的韧脆转变温度(DBTT)进行了测试和分析。首先,基于对四点弯曲过程的应变率和强度随温度变化的分析获得了商用轧制纯钨的DBTT。结果表明,用标准四点弯曲法测得的工业轧制纯钨的DBTT值在150℃以下,低于相同材料的拉伸试验和冲击试验的测量值。然后对比不同加载速率的4PBT和拉伸试验的结果,证实了不同的DBTT测试方法的加载速率依赖性。最后,对测试方法影响DBTT测量的原因进行了分析和讨论。 相似文献
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