Studies of material migration and deposition after the 2017 experimental campaign in EAST
Studies of material migration and deposition after the 2017 experimental campaign in EAST
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2017 年 EAST 实验活动后的材料迁移和沉积研究
DOI：
10.1016/j.nme.2021.101103
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发表时间：
2022-03
影响因子：
2.6
通讯作者：
Xiongyuan Si
中科院分区：
文献类型：
--
作者：
J. Peng;Jiao Peng;Changjun Li;Gang Xu;Rui Ding;Wei Zheng;Binfu Gao;Dahuan Zhu;Baoguo Wang;Lei Mu;Jiale Chen;Fujun Gou;Yuwei You;Zongbiao Ye;Kun Zhang;Xiongyuan Si
等离子体-壁面相互作用是托卡马克装置的关键问题之一，因为材料的侵蚀和沉积将严重影响等离子体面对材料的寿命、燃料滞留和等离子体性能。首次分析了2017年EAST上偏滤器、钼内壁和石墨下偏滤器运行后的材料迁移和沉积情况。结果表明，在面向等离子体材料上沉积的元素主要由Li、C、O、W和Mo等组成，主要来自壁面调节材料的沉积和面向等离子体材料的溅射。由于EAST中常规的锂壁调节，超过90重量%的沉积物是碳酸锂和氢氧化锂。从较低的内部偏滤器石墨瓦上的元素密度的定量表征表明，W和Mo沉积增加时，更接近较低的偏滤器，这是一致的归一化极向磁通量的减少。用手持式X射线荧光仪（XRF）测量了PFMs沿极向沿着的元素组成。沉积的Mo和W的浓度在大多数PFM表面上小于0.2wt%。在高场侧的TZM内壁表面上，观察到上W偏滤器附近和中平面瓦处的W浓度双峰，这可以通过在上内偏滤器附近的位置处较高的再沉积或具有较小的归一化极向磁通来解释。此外，与穹丘区相比，在偏滤器内、外区的走向点附近发现了更多的再沉积Mo和W。
Plasma-wall interaction is one of the key issues in tokamaks, as the material erosion and deposition will strongly influence the lifetime of plasma facing materials, fuel retention and plasma performance. Material migration and deposition have been firstly analyzed after the 2017 experimental campaign in EAST with tungsten (W) upper divertor, molybdenum inner wall and graphite lower divertor. It is found that the deposited elements on plasma-facing materials (PFMs) mainly consisted of Li, C, O, W and Mo etc, which was from the deposition of wall conditioning material and the sputtering of PFMs. More than 90 wt% of the deposits were lithium carbonate and lithium hydroxide due to the routine lithium wall conditioning in EAST. Quantitative characterization of element density on graphite tile from lower inner divertor showed that W and Mo deposition increased when closer to the lower divertor, which is consistent with the decreasing normalized poloidal magnetic flux. The element composition of PFMs along poloidal direction has been measured by handheld X-ray fluorescence (XRF). The concentration of deposited Mo and W is less than 0.2 wt% on most of the PFM surface. Double peaks of W concentration near the upper W divertor and at the midplane tile were observed on the TZM inner wall surface at the high-field side, which can be explained by higher redeposition at the location near the upper inner divertor or with a smaller normalized poloidal magnetic flux. Besides, more redeposited Mo and W was found at the inner and outer divertor near strike points compared with the dome region.
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影响因子：
2.9
作者：
V. Winters;S. Brezinsek;F. Effenberg;M. Rasinski;O. Schmitz;L. Stephey;C. Biedermann;C. Dhard;H. Frerichs;J. Harris;M. Krychowiak;R. König;T. Pedersen;G. Wurden
通讯作者：
V. Winters;S. Brezinsek;F. Effenberg;M. Rasinski;O. Schmitz;L. Stephey;C. Biedermann;C. Dhard;H. Frerichs;J. Harris;M. Krychowiak;R. König;T. Pedersen;G. Wurden
影响因子：
3.1
作者：
Xie Chunyi;Jinglan Chen;Jiuyuan Li;Fang Qianfeng
通讯作者：
Xie Chunyi;Jinglan Chen;Jiuyuan Li;Fang Qianfeng
影响因子：
3.1
作者：
R. Reichle;P. Andrew;P. Bates;O. Bede;N. Casal;C. Choi;R. Barnsley;C. Damiani;L. Bertalot;G. Dubus;J. Ferreol;G. Jagannathan;M. Kocan;F. Leipold;S. Lisgo;V. Martin;J. Palmer;R. Pearce;V. Philipps;R. Pitts;R. Pampin;G. Passedat;A. Puiu;A. Suarez;P. Shigin;W. Shu;G. Vayakis;E. Veshchev;M. Walsh
通讯作者：
R. Reichle;P. Andrew;P. Bates;O. Bede;N. Casal;C. Choi;R. Barnsley;C. Damiani;L. Bertalot;G. Dubus;J. Ferreol;G. Jagannathan;M. Kocan;F. Leipold;S. Lisgo;V. Martin;J. Palmer;R. Pearce;V. Philipps;R. Pitts;R. Pampin;G. Passedat;A. Puiu;A. Suarez;P. Shigin;W. Shu;G. Vayakis;E. Veshchev;M. Walsh
影响因子：
3.1
作者：
M. Mayer;V. Rohde;K. Sugiyama;J. Chen;X. Gong;C. Hopf;J. Likonen;S. Lindig;R. Neu;G. Ramos;E. Vainonen-Ahlgren;A. Wiltner
通讯作者：
M. Mayer;V. Rohde;K. Sugiyama;J. Chen;X. Gong;C. Hopf;J. Likonen;S. Lindig;R. Neu;G. Ramos;E. Vainonen-Ahlgren;A. Wiltner
影响因子：
2.6
作者：
N. Catarino;N. Barradas;V. Corregidor;A. Widdowson;A. Baron-Wiechec;J. Coad;K. Heinola;M. Rubel;E. Alves;J. Contributors
通讯作者：
N. Catarino;N. Barradas;V. Corregidor;A. Widdowson;A. Baron-Wiechec;J. Coad;K. Heinola;M. Rubel;E. Alves;J. Contributors