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.

在国家融合科学研究所（NIFS）中沉积在大型螺旋装置（LHD）中的示踪剂杂质离子的行为，并通过各种诊断良好的精度观察到具有示踪剂的固体颗粒（TESPEL）注射的示踪剂固体颗粒（TESPEL）注射的行为。 。电荷交换重组光谱（CXR）具有高能（150〜180 keV）中性束（NB）通常在示踪剂离子和中性颗粒之间的电荷交叉截面非常低。但是，在真空粉状物（VUV）和超软X射线域中具有高能量NB的CXRS使我们能够测量示踪剂离子的排放。基于此结果的CXRS系统的进一步改进将使我们能够以更高的精度测量示踪剂离子的行为。最近，LHD中安装了低能（40 KEV）NB注射器。从我们的研究中获得的这种低能NB和知识的结合可能为测量具有高空间分辨率的示踪剂离子的行为开辟了道路。使用通常的VUV和X射线光谱，血浆中示踪离子的行为的性质几乎没有显示出电子密度和电子温度的变化。该结果将是对光谱系统进一步改进的重要基础。通过使用来自AXUV光电二极管阵列的信号的2D断层扫描，在二维上观察到了示踪剂离子的行为。具有适当光滤波器的AXUVD光电二极管阵列将是有效的成像诊断。为了从TESPEL注入获得的实验数据中获得具有良好精度的运输系数，已经开发了针对恒星等离子体优化的杂质传输代码。根据从我们的研究中获得的结果，将很快准备就绪，以tespel注入进行杂质传输的全尺度成像诊断。

项目成果

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.

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.

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.

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

Recent diagnostic developments on LHD,

LHD 的最新诊断进展，

• 发表时间: 2003
• 期刊: Plasma Physics and Controlled Fusion Vol.45, No.7
• 作者: S.Sudo;T.Ozaki;N.Ashikawa;M.Emoto;et al.
• 通讯作者: et al.