Carbon layers in the divertor of ASDEX Upgrade
Carbon layers in the divertor of ASDEX Upgrade
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ASDEX Upgrade 偏滤器中的碳层
DOI：
10.1016/s0022-3115(00)00574-2
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发表时间：
2001
影响因子：
3.1
通讯作者：
J. Perchermaier
中科院分区：
文献类型：
--
作者：
V. Rohde;H. Maier;K. Krieger;R. Neu;J. Perchermaier
碳作为聚变装置中第一壁材料的主要缺点之一是氢与被侵蚀的碳的共沉积。这些层将包含聚变反应堆的大量氚库存。排气后，在ASDEX升级的偏滤器结构下发现了褐色层和薄片。对这些薄片进行了初步研究。由于偏滤器之外的复杂结构，出现阴影效应，表明棕色层是由电离粒子沉积的。使用SEM和离子束技术分析薄片。发现了两种不同类型的碳氢化合物层：棕色贫氢层（D/C = 0.4）和透明富氢层（D/C = 1）。偏滤器外的碳总量估计为1.5 g，在3000 s的等离子体放电中沉积。首次采用石英晶体微天平测量了薄膜的生长。
One of the main disadvantages of carbon as first wall material in a fusion device is the co-deposition of hydrogen with the eroded carbon. These layers will contain a significant amount of the tritium inventory of a fusion reactor. After venting brownish layers and flakes were found under the divertor structure of ASDEX Upgrade. First investigations were made on these flakes. Due to the complicated structure beyond the divertor, shadowing effects occur indicating that the brown layers are deposited by ionised particles. The flakes were analysed using SEM and ion beam techniques. Two different types of hydrocarbon layers were found: The brownish hydrogen poor layer (D/C = 0.4) and transparent hydrogen rich layer (D/C = 1) The total amount of carbon beyond the divertor could be estimated to 1.5 g, deposited in 3000 s of plasma discharges. First measurement of the layer growth using a quartz crystal microbalance instrument is presented.