Fine metal dust particles on the wall probes from JET-ILW
Fine metal dust particles on the wall probes from JET-ILW
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DOI：
10.1088/1402-4896/aa8ddf
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发表时间：
2017-12-01
期刊：
影响因子：
2.9
通讯作者：
Zychor, I.
中科院分区：
文献类型：
--
作者：
Fortuna-Zalesna, E.;Grzonka, J.;Zychor, I.
在实验活动之后，定期对受控聚变装置在等离子体运行期间产生的粉尘进行收集和非现场研究。在此介绍了在使用类似ITER的金属壁的第二阶段运行（2013-2014年）之后在JET中进行的灰尘调查的结果。有史以来第一次对沉积在硅板上的粒子进行了检查，硅板用作安装在内部和外部偏滤器中的灰尘收集器。重点是分析金属颗粒（Be和W），目的是确定其成分，尺寸和表面形貌。最重要的是鉴别液滴形式的铍尘（包括飞溅物和球形颗粒）、共沉积物薄片和铍砖小碎片。还鉴定了富钨和富镍（来自铬镍铁合金）颗粒。在所有类型的颗粒中均检测到来自等离子体边缘冷却的氮。它们被分类和各种成分的起源进行了讨论。
Collection and ex situ studies of dust generated in controlled fusion devices during plasma operation are regularly carried out after experimental campaigns. Herewith results of the dust survey performed in JET after the second phase of operation with the metal ITER-like wall (2013-2014) are presented. For the first-time-ever particles deposited on silicon plates acting as dust collectors installed in the inner and outer divertor have been examined. The emphasis is on analysing metal particles (Be and W) with the aim to determine their composition, size and surface topography. The most important is the identification of beryllium dust in the form of droplets (both splashes and spherical particles), flakes of co-deposits and small fragments of Be tiles. Tungsten and nickel rich (from Inconel) particles are also identified. Nitrogen from plasma edge cooling has been detected in all types of particles. They are categorized and the origin of various constituents is discussed.