Fuel removal from bumper limiter tiles by using a pulsed excimer laser
Fuel removal from bumper limiter tiles by using a pulsed excimer laser
复制标题
使用脉冲准分子激光器从保险杠限制器瓦上去除燃料
DOI：
10.1016/j.jnucmat.2004.10.148
复制
发表时间：
2005
影响因子：
3.1
通讯作者：
P. Wienhold
中科院分区：
文献类型：
--
作者：
B. Emmoth;S. Khartsev;A. Pisarev;A. Grishin;U. Karlsson;A. Litnovsky;M. Rubel;P. Wienhold
用扫描电镜和核反应分析方法研究了TEXTOR托卡马克限制器瓦激光加热前后的样品。SEM图像显示，球体和薄片覆盖的表面，这是由等离子体粒子在掠射角下撞击改性的区域。由于表面粗糙，在“薄片”之间存在阴影区域。激光脉冲不会导致预期的表面常见烧蚀。而看起来像“熔化”的薄表面层的功能观察。瓷砖表面层中的初始氘含量为每平方厘米1018 D原子的量级。在激光冲击之后，含量降低60-70%;通过将沉积功率降低四分之一，氘含量降低40- 50%。我们作出的解释，我们接近一个阈值的激光闪烁方法在聚变装置。
Samples of a limiter tile from the TEXTOR tokamak were investigated by scanning electron microscopy and nuclear reaction analysis both before and after laser heating. SEM images showed spheres and thin flakes covering the surface which are the areas modified by plasma particles striking under grazing angles. Due to roughness of the surface there are shadowed regions between the ‘flakes’. Laser pulses did not lead to expected common ablation of the surface. Features that looked like ‘melting’ of thin surface layers were rather observed. The initial deuterium content in the surface layer of tiles was of the order of 1018D atoms per cm2. After the laser light impact the content decreased with 60–70%; by reducing the deposited power by a factor four, the deuterium content was decreased by 40–50%. We make the interpretation that we approach a threshold of the laser detritiation method in fusion devices.