Particle Transport Study by Imaging Diagnostics with Tracer-Encapsulated Pellet

使用示踪剂封装颗粒进行成像诊断的颗粒输运研究

• 批准号: 15340201
• 负责人: SUDO Shigeru
• 金额: $ 9.34万
• 依托单位: National Institute for Fusion Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340201/
• 关键词: Tracer-encapsulated pellet; TESPEL; LHD plasma; Particle Transport; Particle Diffusion; Impurity Transport code; Tomography; トレーサー内蔵ペレット; トレーサ内蔵ペレット; 電場効果; 電場による粒子拡散の違い; トレーサー内蔵固体ペレット; 荷電交換分光; LHD

Behaviors of tracer impurity ions, which are deposited into plasmas of the Large Helical Device (LHD) in National Institute for Fusion Science (NIFS) with a tracer-encapsulated solid pellet (TESPEL) injection, have been observed with a good accuracy by various diagnostics. A charge exchange recombination spectroscopy (CXRS) with a high-energy (150~180 keV) neutral beam (NB) usually suffers from a very low charge-exchange cross section between tracer ions and neutral particles. However, the CXRS with the high-energy NB in a vacuum-ultraviolet (VUV) and ultra soft x-ray domain enables us to measure emissions from the tracer ions. Further improvements on the CXRS system based on this result will allow us to measure the behavior of the tracer ions with a higher accuracy. Recently, a low-energy (40 keV) NB injector has been installed in LHD. A combination of this low-energy NB and knowledge obtained from our research may open the way for the measurement of the behavior of tracer ions with a high spatial resolution. With usual VUV and X-ray spectroscopy, the property of the behavior of the tracer ions in the plasma, which shows almost no change in the electron density and the electron temperature, has been observed. This result will be an important basis for the further improvements on the spectroscopic system. By using 2D tomography of signals from AXUV photodiode arrays, the behavior of the tracer ions has been observed two-dimensionally. The AXUVD photodiode arrays with an appropriate optical filter will be an effective imaging diagnostics. In order to obtain transport coefficients with a good accuracy from experimental data obtained by the TESPEL injection, an impurity transport code optimized for stellarator plasmas has been developed. Based on the results obtained from our research, full-scale imaging diagnostics for the impurity transport with the TESPEL injection will be ready soon.

用示踪剂包封固体粒子（TESPEL）注入NIFS大型螺旋装置（LHD）等离子体，通过各种诊断方法，对注入LHD等离子体的示踪杂质离子的行为进行了精确的观测。高能（150~180 keV）中性束（NB）的电荷交换复合光谱（CXRS）通常存在示踪离子与中性粒子之间的电荷交换截面非常低的问题。然而，在真空紫外（VUV）和超软X射线域中具有高能NB的CXRS使我们能够测量示踪离子的发射。在此基础上对CXRS系统进行进一步改进，将使我们能够以更高的精度测量示踪离子的行为。最近，一个低能量（40千电子伏）NB注入器已被安装在LHD。这种低能量NB和从我们的研究中获得的知识的组合可能会开辟一条道路，以高空间分辨率的示踪离子的行为的测量。用常规的真空紫外和X射线光谱法，已经观察到等离子体中示踪离子的行为的性质，其显示电子密度和电子温度几乎没有变化。这一结果将为进一步改进光谱系统提供重要依据。通过使用二维层析成像的信号从AXUV光电二极管阵列，示踪离子的行为已被观察到二维。AXUVD光电二极管阵列与适当的滤光片将是一个有效的成像诊断。为了从TESPEL注入实验数据中获得具有良好精度的输运系数，开发了一个优化的仿星器等离子体杂质输运程序。基于我们的研究结果，TESPEL注入杂质输运的全尺寸成像诊断将很快准备就绪。

项目成果

Development of the Ultrasoft X-ray Diagnostic for impurity transport studies with a Tracer-Encapsulated Solid Pellet Injection on LHD

开发超软 X 射线诊断，用于 LHD 上示踪剂封装固体颗粒注射的杂质输运研究

• 发表时间: 2004
• 期刊: Journal of Plasma and Fusion Research Vol.80, No.7
• 作者: D.Kalinina;S.Sudo;D.Stutman;M.Finkenthal;N.Tamura;et al.
• 通讯作者: et al.

Applicability of the TESPEL Charge-Exchange Recombination Spectroscopy Diagnostics for Impurity Transport Study on LHD

TESPEL 电荷交换复合光谱诊断在 LHD 杂质输运研究中的适用性

• 发表时间: 2004
• 期刊: Journal of Plasma and Fusion Research SERIES Vol.6
• 作者: D.Kalinina;N.Tamura;S.Sudo;V.Sergeev;et al.
• 通讯作者: et al.

High throughput ultrasoft x-ray polychromator for embedded impurity pellet injection studies,

用于嵌入杂质颗粒注射研究的高通量超软 X 射线多色仪，

• 发表时间: 2005
• 期刊: Review of Scientific Instruments Vol.76, No.1
• 作者: D.Stutman;M.Finkenthal;L.Delgado-Aparicio;K.Tritz;N.Tamura;D.Kalinina;A.Matsubara;K.Sato;S.Sudo
• 通讯作者: S.Sudo

Plasma performance and impurity behaviour in long pulse discharge on LHD,

LHD 上长脉冲放电中的等离子体性能和杂质行为，

• 发表时间: 2003
• 期刊: Nuclear Fusion Vol.43, No.4
• 作者: Y.Nakamura;Y.Takeiri;R.Kumazawa;M.Osakabe;et al.
• 通讯作者: et al.

Application of Tomographic imaging to photodiode arrays in LHD

层析成像在铲运机光电二极管阵列中的应用

• 发表时间: 2006
• 期刊: Rev. Sci. Instrum. 77 10F501
• 作者: Y. Liu;N. Tamura;B. J. Peterson;N. Iwama;and LHD Experimental Group
• 通讯作者: and LHD Experimental Group