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含TiN阻氚过渡层新型第一壁的氘渗透实验研究

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材料导报 2022年第S1期36卷 38-42页

作者：张舒婷黄向玫赵栋烨洪志浩曾晓晓才来中核工业西南物理研究院成都610041

为了更好地控制氚滞留和改善氚循环,同时确保聚变装置的氚安全许可,第一壁的阻氚性能显得格外重要。一种含氮化钛(TiN)阻氚过渡层的新型第一壁结构被提出,由化学气相沉积钨(CVD-W)作为面向等离子体材料(PFM),低活化铁素体马氏体钢(RAFM)... 详细信息

为了更好地控制氚滞留和改善氚循环,同时确保聚变装置的氚安全许可,第一壁的阻氚性能显得格外重要。一种含氮化钛(TiN)阻氚过渡层的新型第一壁结构被提出,由化学气相沉积钨(CVD-W)作为面向等离子体材料(PFM),低活化铁素体马氏体钢(RAFM)CLF-1作为基体材料,TiN作为过渡层,该过渡层兼具结合功能和阻氚功能。为了研究该第一壁结构的阻氚性能,本工作制备了具有不同基材粗糙度的样品,采用气相驱动渗透(GDP)实验对样品进行氘渗透测试,采用配有能谱仪(EDS)的扫描电镜(SEM)及X射线衍射仪(XRD)对样品的CVD-W表面、TiN过渡层及样品截面进行微观形貌观察及成分分析。结果表明,氘的渗透率与温度满足Arrhenius关系。相较于在CLF-1钢中,氘在含TiN阻氚过渡层第一壁结构中有更低的渗透率,对氘有明显的阻挡效果。基材粗糙度较大的样品在渗透过程中发生了CVD-W的碎裂和脱落以及TiN过渡层的开裂,使其氘渗透率相对更大。

关键词：第一壁阻氚氘的渗透 TiN CVD-W CLF-1钢

Diagnostics of First Wall Materials in a Magnetically Confined Fusion Device by Polarization-Resolved Laser-Induced Breakdown Spectroscopy

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Plasma Science and Technology 2014年第2期16卷 149-154页

作者：赵栋烨纳扎海然吴鼎丁洪斌 School of Physics and Optical Engineering Key Laboratory of Materials Modification by LaserIon and Electron BeamsChinese Ministry of EducationDalian University of Technology

Laser-induced breakdown spectroscopy （LIBS） is a powerful analytical tool for real- time diagnostics and detection of multiple elements deposited at the first wall of magnetically confined plasma ft^sion devices. Recently, we have tested LIBS in our laboratory for application to in situ real-time diagnostics in the fusion device EAST. In this study, we applied polarization- resolved LIBS （PR-LIBS） to reduce the background continuum and enhance the resolution and sensitivity of LIBS. We used aluminium （A1）（as a substitute for Be） and the first wall materials tungsten （W） and molybdenum （Mo） to investigate polarized continuum emission and signal-to- background ratio （SBR）. A Nd：YAG laser with first, second and third harmonics was used to produce plasma. The effects of the laser polarization plane, environmental pressure and polarizer detection angle were investigated. The spectra obtained without using a polarizer （i.e. LIBS） were compared with those obtained with a polarizer （PR-LIBS）. Distribution of emission spectral intensity was observed to follow Malus＇ law with respect to variation in the angle of detection of the polarizer. The spectra obtained by PR-LIBS had a higher SBR and greater stability than those obtained by LIBS, thereby enhancing the reliability of LIBS for quantitative analyses. A comparison of A1, Mo and W showed that W exhibited a higher continuum with stronger polarization than the low-Z elements.

关键词： LIBS PR-LIBS EAST first wall laser-produced plasma

Spatial Resolution Measurements of C,Si and Mo Using LIBS for Diagnostics of Plasma Facing Materials in a Fusion Device

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Plasma Science and Technology 2015年第8期17卷 638-643页

作者：李聪赵栋烨吴兴伟丁洪斌 Key Laboratory of Materials Modification by Laser Ion and Electron BeamsChinese Ministry of EducationSchool of Physics and Optical Electronic TechnologyDalian University of Technology

Recently, a laser-induced breakdown spectroscopic （LIBS） system has been developed for in situ measurements of the chemical compositions of plasma facing materials （PFMs） in the Experimental Advanced Superconducting Tokamak （EAST）. In this study, a LIBS system, which was used in a similar optical configuration to the in situ LIBS system in EAST, has been developed to investigate the spatial distribution of PFM elements at 10-4 Pa. The aim of this study was to understand the nature of the spatial distribution of atoms or ions of different elements in the plasma plume and optimize the signal to background ratio for the in situ LIBS diagnosis in EAST. The spatial profiles of the LIBS signals of C, Si, Mo and the continuous background were measured. Moreover, the influence of laser spot size and laser energy density on the LIBS signals of C, Si, Mo and H was also investigated. The results show that the distribution of the C, Si and Mo peaks＇ intensities first increased and then decreased from the center to the edge of the plasma plume. There was a maximum value at R ≈ 1.5 mm from the center of the plasma plume. This work aims to improve the understanding of ablating plasma dynamics in very low pressure environments and give guidance to optimize the LIBS system in the EAST device.

关键词： laser induced breakdown spectroscopy plasma expansion spatial distribution EAST

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基于激光诱导击穿光谱地沟油鉴别的初步探究

科学通报 2014年第21期59卷 2071-2076页

作者：吴鼎海然刘平赵栋烨刘佳宏丁洪斌大连理工大学物理与光电工程学院、三束材料改性教育部重点实验室大连116024

对常见食用油和地沟油进行了基于激光诱导击穿光谱鉴别研究,建立了人工神经网络模型,预测检验结果良好.选择本地超市常见的2种食用油和大连市产品质量监督检验所提供的地沟油,以定量无尘分析滤纸为基底,获得了滤纸、豆油、调和油、地沟... 详细信息

对常见食用油和地沟油进行了基于激光诱导击穿光谱鉴别研究,建立了人工神经网络模型,预测检验结果良好.选择本地超市常见的2种食用油和大连市产品质量监督检验所提供的地沟油,以定量无尘分析滤纸为基底,获得了滤纸、豆油、调和油、地沟油4种样品各140组LIBS光谱数据,提取了24个特征谱线进行主成分分析,各类样品在主成分空间中呈现良好聚集分类.将得到的140组光谱数据,100组作为训练集,建立人工神经网络模型,40组作为测试数据进行鉴别,识别率达98.1%.基于主成分分析建立的人工神经网络模型识别率达94.2%.研究结果表明,基于主成分分析和人工神经网络的激光诱导击穿光谱检测技术为地沟油快速高效鉴别研究带来了新的思路与方法,对地沟油的鉴别具有十分重要的意义.

关键词：激光诱导击穿光谱地沟油食用油主成分分析人工神经网络食用油鉴别

Temporal and spatial dynamics of optical emission from laser ablation of the first wall materials of fusion device

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Plasma Science and Technology 2018年第1期20卷 150-157页

作者：赵栋烨李聪王勇王志伟高亮胡振华吴婧罗广南丁洪斌 Key Laboratory of Materials Modification by Laser Ion and Electron Beams Chinese Ministry of Education School of Physics Dalian University of Technology Institute of Plasma Physics Chinese Academy of Sciences

Laser-induced breakdown spectroscopy （LIBS） has been developed to in situ diagnose the chemical compositions of the first wall in the EAST tokamak. However, the dynamics of optical emission of the key plasma-facing materials, such as tungsten, molybdenum and graphite have not been investigated in a laser produced plasma （LPP） under vacuum. In this work, the temporal and spatial dynamics of optical emission were investigated using the spectrometer with ICCD. Plasma was produced by an Nd：YAG laser （1064 nm） with pulse duration of 6 ns. The results showed that the typical lifetime of LPP is less than 1.4 #s, and the lifetime of ions is shorter than atoms at ~10-6mbar. Temporal features of optical emission showed that the optimized delay times for collecting spectra are from 100 to 400 ns which depended on the corresponding species. For spatial distribution, the maximum LIBS spectral intensity in plasma plume is obtained in the region from 1.5 to 3.0 mm above the sample surface. Moreover, the plasma expansion velocity involving the different species in a multicomponent system was measured for obtaining the proper timing （gate delay time and gate width） of the maximum emission intensity and for understanding the plasma expansion mechanism. The order of expansion velocities for various species is Vc＋〉 VH 〉 Vsi＋〉 VLi 〉 VMo 〉 Vw. These results could be attributed to the plasma sheath acceleration and mass effect. In addition, an optimum signal-to-background ratio was investigated by varying both delay time and detecting position.

关键词： laser induced breakdown spectroscopy EAST tokamak temporal and spatialdynamics

Preliminary results of in situ laser-induced breakdown spectroscopy for the first wall diagnostics on EAST

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Plasma Science and Technology 2017年第2期19卷 56-62页

作者：胡振华李聪肖青梅刘平丁芳毛红敏吴婧赵栋烨丁洪斌罗广南 EAST team Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 People's Republic of China Key Laboratory of Materials Modification by Laser Ion and Electron Beams Chinese Ministry of Education School of Physics and Optical Electronic Technology Dalian University of Technology Dalian 116024 People' s Republic of China

Post-mortem methods cannot fulfill the requirement of monitoring the lifetime of the plasma facing components （PFC） and measuring the tritium inventory for the safety evaluation. Laserinduced breakdown spectroscopy （LIBS） is proposed as a promising method for the in situ study of fuel retention and impurity deposition in a tokamak. In this study, an in situ LIBS system was successfully established on EAST to investigate fuel retention and impurity deposition on the first wall without the need of removal tiles between plasma discharges. Spectral lines of D, H and impurities （Mo, Li, Si ） in laser-induced plasma were observed and identified within the wavelength range of 500-700 nm. Qualitative measurements such as thickness of the deposition layers, element depth profile and fuel retention on the wall are obtained by means of in situ LIBS. The results demonstrated the potential applications of LIBS for in situ characterization of fuel retention and co-deposition on the first wall of EAST.

关键词： tokamak laser-induced breakdown spectroscopy impurity deposition fuel retention,plasma wall interaction

偏振分辨激光诱导击穿光谱诊断托托马克第一壁材料

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偏振分辨激光诱导击穿光谱诊断托托马克第一壁材料

Tungsten Film Deposition on CuCrZr Alloy and the Feasibility Diagnosis

第十六届全国等离子体科学技术会议暨第一届全国等离子体医...

作者：赵栋烨 Nazar Farid 海然吴鼎丁洪斌三束材料改性教育部重点实验室物理与光电工程学院大连理工大学

最近我们实验室发展了激光诱导击穿光谱技术(LIBS)用于原位、实时诊断磁约束核聚变装置的第一壁。在模拟EAST托卡马克运行的环境下,研究了第一壁材料钨、钼的LIBS特性。为进一步压制背景噪声,增强LIBS光谱的灵敏度、探测限及分辨率,我... 详细信息

最近我们实验室发展了激光诱导击穿光谱技术(LIBS)用于原位、实时诊断磁约束核聚变装置的第一壁。在模拟EAST托卡马克运行的环境下,研究了第一壁材料钨、钼的LIBS特性。为进一步压制背景噪声,增强LIBS光谱的灵敏度、探测限及分辨率,我们采用偏振分辨激光诱导击穿光谱技术(PRLIBS)来抑制由等离子产生的连续光谱背景。发现PRLIBS技术可较好抑制连续背景提高信号背景比,其原因是因为激光等离子体的连续背景具有很强的偏振特性。同时,我们还研究了PRLIBS发射光谱强度和环境气压与入射激光的偏振方向的关系,发现PRLIBS发射光谱强度不依赖与入射激光的偏振方向。实验中,我们还进一步研究了PRLIBS信号强度和检偏器角度的关系,发现PRLIBS信号随检偏器变化符合马吕斯定律。最后,我们对比研究了纳秒PRLIBS和飞秒PRLIBS对激光等离子体连续背景的抑制作用,发现fs-PRLIBS技术对连续背景的抑制作用更明显,其原因是因为飞秒激光的功率密度高,激发出的等离子体各向异性性更强,致使激光等离子体连续背景的极化率更高,此外,fs-PRLIBS的弱基体效应,也是一个重要原因。

关键词：偏振分辨激光诱导击穿光谱(PRLIBS) fs-PRLIBS 壁材料 EAST

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Tungsten Film Deposition on CuCrZr Alloy and the Feasibility...

基于激光技术的EAST原位激光诱导击穿/烧蚀光谱壁诊断系统搭建及结果

第十八届全国等离子体科学技术会议

作者：伊穆王奇海然赵栋烨石劼霖丁洪斌 School of Physics Dalian University of Technology

In fusion devices,Plasma Facing Components(PFCs) suffer from damage from high thermal loads and bombardment on the first wall,especially for the region near the *** EAST,most of the surface in the upper divertor was covered with tungsten(W) Mono-block PFCs,by which high heat fluxes could be sustained,while PFCs of W-plate fixed on Cu Cr Zr block have been used in some parts such as divertor dome and baffles for lower heat loads due to their ***,in sometimes,Cu Cr Zr block was eroded by abnormal plasma events like ELMs,leading to produce massive *** this work,we proposed an approach to solve this problem by coating a W-film on the Cu Cr Zr block using magnetron sputtering ***,the W film was deposited on Cu Cr Zr alloy substrate with four different thicknesses by magnetron sputtering method in this *** was found that uniform W coating up to 20 could be deposited on the ***,high heat flux tests with the intensity almost equal to the value in EAST were performed using the plasma torching equipment to check the thermal behaviour of samples coated with W in order to examine the suitability and thermal load ***,each sample was diagnosed by Scanning Electron Microscopy(SEM) and Energy Dispersive X-Ray spectroscopy(EDX).No obvious damage was observed under heat flux density(even up to 1 MW/m2),which revealed that magnetron sputtering technique had great potential on surface modification for the divertor dome and baffles in Tokomak.

关键词： plasma facing component magnetron sputtering heat flux test SEM EDX

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基于激光技术的EAST原位激光诱导击穿/烧蚀光谱壁诊断系统搭建及...