Coated boron layers by boronization and a real-time boron coating using an impurity powder dropper in the LHD

被引：0
|
作者：
Ashikawa, Naoko [1 ]
Lunsford, Robert [2 ]
Nespoli, Federico [2 ]
Gilson, Erik [2 ]
Yu, Yaowei [3 ]
Hu, Jiansheng [3 ]
Kado, Shinichiro [4 ]
机构：
[1] Natl Inst Fus Sci, Toki 5095292, Japan
[2] Princeton Plasma Phys Lab, Princeton, NJ 08540 USA
[3] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[4] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan
来源：
PLASMA SCIENCE & TECHNOLOGY | 2024年 / 26卷 / 08期
关键词：
boron layer; oxygen impurity; hydrogen recycling; impurity powder dropper; LHD; EAST;
D O I：
10.1088/2058-6272/ad495f
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
In the Large Helical Device (LHD), diborane (B2H6) is used as a standard boron source for boronization, which is assisted by helium glow discharges. In 2019, a new Impurity Powder Dropper (IPD) system was installed and is under evaluation as a real-time wall conditioning technique. In the LHD, which is a large-sized heliotron device, an additional helium (He) glow discharge cleaning (GDC) after boronization was operated for a reduction in hydrogen recycling from the coated boron layers. This operational time of 3 h was determined by spectroscopic data during glow discharges. A flat hydrogen profile is obtained on the top surface of the coated boron on the specimen exposed to boronization. The results suggest a reduction in hydrogen at the top surface by He-GDC. Trapped oxygen in coated boron was obtained by boronization, and the coated boron, which has boron-oxide, on the first wall by B-IPD was also shown. Considering the difference in coating areas between B2H6 boronization and B-IPD operation, it would be most effective to use the IPD and B2H6 boronization coating together for optimized wall conditioning.
引用
收藏
页数：7
相关论文
共 50 条
  • [1] Coated boron layers by boronization and a real-time boron coating using an impurity powder dropper in the LHD
    Naoko ASHIKAWA
    Robert LUNSFORD
    Federico NESPOLI
    Erik GILSON
    Yaowei YU
    Jiansheng HU
    Shinichiro KADO
    Plasma Science and Technology, 2024, 26 (08) : 30 - 36
  • [2] Glow Discharge Boronization and Real-Time Boronization Using an Impurity Powder Dropper in LHD
    Masuzaki, S.
    Shoji, M.
    Nespoli, F.
    Lunsford, R.
    Motojima, G.
    Yajima, M.
    Tokitani, M.
    Oishi, T.
    Kawate, T.
    Goto, M.
    Kasahara, H.
    Yoshimura, Y.
    Gilson, E. P.
    Pablant, N.
    Morisaki, T.
    NUCLEAR MATERIALS AND ENERGY, 2025, 42
  • [3] Comparison of active impurity control between lithium and boron powder real-time injection in EAST
    Xu, W.
    Hu, J. S.
    Sun, Z.
    Maingi, R.
    Zuo, G. Z.
    Qian, Y. Z.
    Li, C. L.
    Zhang, L.
    Meng, X. C.
    Huang, M.
    Gao, W.
    Duan, Y. M.
    Tang, Z. L.
    Yuan, J. S.
    Zhang, D. H.
    PHYSICA SCRIPTA, 2021, 96 (12)
  • [4] Interpretive modelling of boron transport in the boundary plasma of WEST experiments with the impurity powder dropper
    Afonin, K.
    Gallo, A.
    Marandet, Y.
    Moreau, Ph.
    Bodner, G.
    Bufferand, H.
    Ciraolo, G.
    Desgranges, C.
    Devynck, P.
    Diallo, A.
    Gaspar, J.
    Guillemaut, C.
    Guirlet, R.
    Gunn, J. -P.
    Fedorczak, N.
    Loarer, T.
    Lunsford, R.
    Manas, P.
    Nespoli, F.
    Rivals, N.
    Tamain, P.
    Unterberg, E. A.
    NUCLEAR FUSION, 2023, 63 (12)
  • [5] Investigation of boron powder flow rates on real-time wall
    Xu, W.
    Wang, Z.
    Sun, Z.
    Maingi, R.
    Zhou, Z. T.
    Guan, Y. H.
    Zhu, Y.
    Meng, X. C.
    Huang, M.
    Yu, Y. W.
    Zuo, G. Z.
    Hu, J. S.
    NUCLEAR MATERIALS AND ENERGY, 2025, 42
  • [6] Simulation Analysis of Transport of Boron Dust Particles Injected by Impurity Powder Dropper in the Large Helical Device
    Shoji, Mamoru
    Kawamura, Gakushi
    Smirnov, Roman
    Tanaka, Yasunori
    JOURNAL OF ADVANCED SIMULATION IN SCIENCE AND ENGINEERING, 2024, 11 (01): : 12 - 20
  • [7] Real-time wall conditioning by controlled injection of boron and boron nitride powder in full tungsten wall ASDEX Upgrade
    Bortolon, A.
    Rohde, V
    Maingi, R.
    Wolfrum, E.
    Dux, R.
    Herrmann, A.
    Lunsford, R.
    McDermott, R. M.
    Nagy, A.
    Kallenbach, A.
    Mansfield, D. K.
    Nazikian, R.
    Neu, R.
    NUCLEAR MATERIALS AND ENERGY, 2019, 19 : 384 - 389
  • [8] Real-time wall conditioning and recycling modification utilizing boron and boron nitride powder injections into the Large Helical Device
    Lunsford, R.
    Masuzaki, S.
    Nespoli, F.
    Ashikawa, N.
    Gilson, E. P.
    Gates, D. A.
    Ida, K.
    Kawamura, G.
    Morisaki, T.
    Nagy, A.
    Oishi, T.
    Shoji, M.
    Suzuki, C.
    Yoshinuma, M.
    NUCLEAR FUSION, 2022, 62 (08)
  • [9] Integrated modeling of boron powder injection for real-time plasma-facing component conditioning
    Effenberg, F.
    Schmid, K.
    Nespoli, F.
    Bortolon, A.
    Feng, Y.
    Grierson, B. A.
    Lore, J. D.
    Maingi, R.
    Rudakov, D. L.
    NUCLEAR MATERIALS AND ENERGY, 2025, 42
  • [10] Boron Doped Diamond for Real-Time Wireless Cutting Temperature Monitoring of Diamond Coated Carbide Tools
    Pratas, Sergio
    Silva, Eduardo L.
    Neto, Miguel A.
    Fernandes, Cristina M.
    Fernandes, Antonio J. S.
    Figueiredo, Daniel
    Silva, Rui F.
    MATERIALS, 2021, 14 (23)
12345