Estimation of neutral fluxes on the first mirror of H-alpha diagnostics in ITER

被引：8
作者：
Orlovskiy, Ilya [1 ,2 ]
Andreenko, Evgeny [1 ,2 ]
Alekseev, Andrey [1 ,2 ]
机构：
[1] Kurchatov Inst, Natl Res Ctr, Moscow, Russia
[2] Int Fus Projects Coordinating Ctr, Moscow, Russia
来源：
FUSION ENGINEERING AND DESIGN | 2019年 / 146卷
关键词：
First mirror; Optical diagnostics; ITER;
D O I：
10.1016/j.fusengdes.2019.01.091
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The first mirrors of all optical diagnostics in ITER will be exposed to the fluxes of neutrals, mainly D, T and Be. This can lead to formation of erosion and deposition zones on the mirror surface. In this work, the fluxes of neutral D, T and Be on the first mirror of H-alpha diagnostics in the equatorial ports were analyzed with Zemax OpticStudio software. Only stationary modes of ITER were considered. The geometry of viewing cutouts in diagnostic shielding modules (DSM) and the model of the first mirror units (FMU) were taken from the ENOVIA database. It is shown that the net erosion is dominating in major part of the first mirror zone with erosion rate approximate to 100 nm/year. The net deposition zone is located on the edges of the mirror, where deposition rate reaches up to 900 nm/year. Being made of single crystal molybdenum, the mirrors will keep their optical properties under erosion over the whole ITER lifetime. The contaminated edges are not important for the light collection and imaging of the SOL emission in the areas of interest at the ITER first wall within the selected field-of-view. The DC plasma discharge mirror cleaning system will be used to recover FM performance in case of eventual contamination.
引用
收藏
页码：827 / 830
页数：4
相关论文
共 9 条
[1]  
Bardamid A. F., 2004, PLASMA DEV OPER, V12
[2]  
Behrisch R, 2007, TOP APPL PHYS, V110, P1
[3]   Particle deposition and optical response of ITER motional Stark euect diagnostic first mirrors [J].
Brooks, J. N. ;
Allain, J. P. .
NUCLEAR FUSION, 2008, 48 (04)
[4]  
Kapustin Yu., 2018, 35 DIAGN TG M
[5]   Passive protection of the ITER diagnostic mirrors [J].
Kotov, V. ;
Reiter, D. ;
Litnovsky, A. ;
Krimmer, A. ;
Kirschner, A. ;
Krasikov, Yu .
PHYSICA SCRIPTA, 2011, T145
[6]   Engineering estimates of impurity fluxes on the ITER port plugs [J].
Kotov, Vladislav .
NUCLEAR FUSION, 2016, 56 (10)
[7]   Progress in research and development of mirrors for ITER diagnostics [J].
Litnovsky, A. ;
Voitsenya, V. ;
Sugie, T. ;
De Temmerman, G. ;
Costley, A. E. ;
Donne, A. J. H. ;
Vukolov, K. Yu. ;
Orlovskiy, I. ;
Brooks, J. N. ;
Allain, J. P. ;
Kotov, V. ;
Semerok, A. ;
Thro, P. -Y. ;
Akiyama, T. ;
Yoshida, N. ;
Tokunaga, T. ;
Kawahata, K. .
NUCLEAR FUSION, 2009, 49 (07)
[8]   Testing of sandwich molybdenum mirrors with radiative cooling for H-alpha and visible spectroscopy in ITER [J].
Orlovskiy, Ilya ;
Alekseev, Andrey ;
Andreenko, Evgeniy ;
Asadulin, Gleb ;
Gorshkov, Aleksey .
FUSION ENGINEERING AND DESIGN, 2017, 123 :1011-1014
[9]   Application of the penning discharge for cleaning mirrors in optical diagnostics of the ITER [J].
Rogov, A. V. ;
Kapustin, Yu V. ;
Alekseev, A. G. .
INSTRUMENTS AND EXPERIMENTAL TECHNIQUES, 2015, 58 (01) :161-166
1