摘要
石墨被广泛用于当今的托卡马克装置中 ,作为真空室第一壁和偏滤器靶板的保护材料 ,也是未来聚变堆的一种候选面对等离子体材料。其抗化学溅射性能和抗热冲击性能受到广泛关注。用高能激光束和电子束轰击实验材料 ,模拟聚变堆面对等离子体材料在等离子体破裂时的工作状态 ,考察了 4种掺杂石墨材料在热冲击下的热腐蚀规律。实验结果表明 ,石墨掺杂能有效降低材料的烧蚀率。当激光单脉冲能量密度为 491 5KJ m2 时 ,冲击频率 1 0Hz,持续辐照 3 0秒后 ,几种掺杂石墨的失重率不超过2 1 3 6mg cm2 ,表现出了比纯石墨更优良的抗热冲击性能。
As a candidate plasma facing material,Graphites are widely used as the armor material for first wall and divertor plate in current tokamak devices.The performances of the chemical sputtering and thermal shock have been being mostly concerned.The thermal shock behavior of 4 kinds of impurity doped graphites was investigated under a simulated plasma disruption condition using high-energy laser and electron beam.The experimental results showed that the doped impurities could effectively decrease the erosion rate of the graphite.The weight loss of the doped graphites was lower than 21.36 mg/cm 2 after 30 seconds laser shock with an energy density of 491.5 kJ/m 2 and a frequency of 10Hz.The doped graphites showed much better performance against thermal shock than pure graphite.
出处
《核科学与工程》
CSCD
北大核心
2002年第1期47-52,共6页
Nuclear Science and Engineering
