检索结果-南通市图书馆

Line identification of boron and nitrogen emissions in extreme-and vacuumultraviolet wavelength ranges in the impurity powder dropping experiments of the Large Helical Device and its application to spectroscopic diagnostics

引用

plasma Science and Technology 2021年第8期23卷 6-17页

作者：大石鉄太郎芦川直子 Federico NESPOLI 増崎貴庄司主 Eric P GILSON Robert LUNSFORD 森田繁後藤基志川本靖子鈴木千尋孙震 Alex NAGY David A GATES 森崎友宏 Department of Fusion Science The Graduate University for Advanced StudiesSOKENDAI322-6 Oroshi-choToki 509-5292GifuJapan Princeton plasma Physics Laboratory 100 Stellarator RoadPrincetonNJ 08540United States of America National Institute for Fusion Science National Institutes of Natural Sciences322-6 Oroshi-choToki 509-5292GifuJapan

An impurity powder dropper was installed in the 21 st campaign of the Large Helical Device experiment(Oct.2019–Feb.2020)under a collaboration between the National Institute for Fusion Science and the Princeton plasma Physics Laboratory for the purposes of real-time wall conditioning and edge plasma *** order to assess the effective injection of the impurity powders,spectroscopic diagnostics were applied to observe line emission from the injected ***,extreme-ultraviolet(EUV)and vacuum-ultraviolet(VUV)emission spectra were analyzed to summarize observable impurity lines with B and BN powder *** lines released from B and N ions were identified in the EUV wavelength range of 5–300Ameasured using two grazing incidence flat-field EUV spectrometers and in the VUV wavelength range of 300–2400Ameasured using three normal incidence 20 cm VUV ***–BV and NIII–NVII emission lines were identified in the discharges with the B and BN powder injection,*** B and N emission lines which have large intensities and are isolated from other lines were successfully identified as follows:BI(1825.89,1826.40)A(blended),BII 1362.46A,BIII(677.00,677.14,677.16)A(blended),BIV 60.31A,BV 48.59A,NIII(989.79,991.51,991.58)A(blended),NIV765.15A,NV(209.27,209.31)A(blended),NVI 1896.80A,and NVII *** of the line identifications to the advanced spectroscopic diagnostics were demonstrated,such as the vertical profile measurements for the BV and NVII lines using a space-resolved EUV spectrometer and the ion temperature measurement for the BII line using a normal incidence 3 m VUV spectrometer.

关键词： plasma spectroscopy extreme ultraviolet vacuum ultraviolet magnetically confined fusion impurity seeding wall conditioning

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spectroscopic Studies on Impurity Transport of Core and Edge plasmas in LHD

引用

plasma Science and Technology 2006年第1期8卷 55-60页

作者： Shigeru MORITA Motoshi GOTO SadatsuguMUTO Ryuji KATAI Hisamichi YAMAZAKI Hideaki NOZATO AtsuslliI WAMAE Makoto ATAKE Takashi FUJIMOTO Atsushi SAKAUE Hiroaki NISHIMURA Ikuya SAKURAI Chiho MATSUMOTO Akihiro FURUZAWA Yuzuru TAWARA Mitsutoshi ARAMAKI Yuji OKUMURA Koichi SASAKI 龚先祖李建刚万宝年崔正英 National Institute for Fusion Science Toki 509-5292Japan Department of Fusion Science Graduate University for Advanced StudiesToki 509-5292Japan National Institute of Advanced Industrial Science and Technology Tsukuba 305-8563Japan Department of Engineering Physics Kyoto UniversityKyoto 606-8502Japan Institute of Laser Engineering Osaka UniversityOsaka 565-0871Japan Eco Topia Science Institute Nagoya UniversityNagoya 464-8603Japan Department of Electrical Engineering and Computer Science Nagoya UniversityNagoya 464-8603Japan Institute of plasma Physics Chinese Academy of SciencesHefei 230031China Southwestern Institute of Physics Chengdu 610041China

Spectroscopic diagnostics have been extensively developed for studies of impurity and neutral particle transports at core and edge plasmas in LHD. Diagnostics of core plasmas are similar to a tokamak case, i.e., Zeff from visible bremsstrahlung, K-x-ray measurements from xray spectroscopy using Si（Li） detectors and a compact crystal spectrometer, and high-Z impurity diagnostics from VUV spectroscopy using a flat-field EUV spectrometer. A combination of impurity pellet injection and visible bremsstrahlung is an active tool for determination of the diffusion coeffici＇ent D and convective velocity V. Using this tool the spatial structures of D and V are obtained and discussed with a neoclassical effect. On the other hand, the spectroscopic method for edge diagnostics is considerably different from the tokamak case because of the existence of a thick ergodic layer in addition to the z-points necessarily included into the diagnostic chord view. In order to break this negative situation, Zeeman and polarization spectroscopy are adopted to LHD edge plasmas. As a result, 2-dimensional emission contours of HeI and Ha are successfully obtained. Laser absorption spectroscopy is tried to measure hydrogen neutrals directly. Radial profiles of edge impurities are also measured with a mirror-assembled 3 m VUV spectrometer. Recent results of and progress in LHD spectroscopy are briefly reviewed.

关键词： impurity transport plasma spectroscopy hydrogen neutral

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spectroscopic Measurement of Shock Waves in an Arcjet plasma Expanding Through a Conical Nozzle

引用

plasma Science and Technology 2013年第2期15卷 89-92页

作者： K.KOZUE G.KUMAKAWA S.NAMBA T.ENDO K.TAKIYAMA K.SATO N.TAMURA Graduate school of Engineering Hiroshima University1-4-1 KagamiyamaHigashi-HiroshimaHiroshima 739-8527Japan National Institute for Fusion Science 322-6 Oroshi-cyo TokiGifu 509-5292Japan

A diamond-shaped shock wave was created in a helium arcjet plasma. Visi- ble/ultraviolet emission spectroscopy was used to investigate the condition for the formation of stable shocks and to determine characteristics of the plasma. Dependence of the position of the shock front on the gas pressure in the expansion region was investigated. It was found that the shock wave arises from the collision of plasma particles and residual neutral atoms in that region. Continuum and line spectra of neutral helium were measured, from which the electron temper- atures were derived. The electron density was deduced from the Inglis-Teller limit of the He I 2p3p-3d3D series. The temperature and density were found to have almost constant values of 0.2 eV and 8.5x 1013 cm-3, respectively, across the shock front.

关键词： arcjet plasma shock wave plasma spectroscopy atomic and molecular pro-cesses

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：