Dynamic Edge-Control and Transport in High-Temperature Plasma

高温等离子体中的动态边缘控制和传输

• 批准号: 08044180
• 负责人: NODA Nobuaki
• 金额: $ 3.39万
• 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 international Scientific Research
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08044180/
• 关键词: RF-limiter; high Z limiter; pellet injection; noble-gas injectio; ion sensitive probe; carbon-carbon composite; edge-plasma control; dynamic ergodization; 希ガ入射; 炭素複合素材

(1) A few experiments have been carried out for the edge-plasma control. They are RF-limiter experiments, high Z limiter experiments, pellet injection experiments, and noble gas injection experiments, in which several experimtal results have been obtained. Two Germen scientists visited Nagoya university and did a preliminary experiments on the RF-limiter. Based on the results, a new limiter has been designed and fablicated for TEXTOR tokamak in Germeny.(2) A twin-limiter made of tungsten and carbon has been incerted.to TEXTOR tokamak. It has been found that carbon has deposited on the tungsten surface. On the other hand, tungsten deposition on carbon was small, which indicates smaller erosion rate at the tungstenside as expected. The results will be presented by Dr. Ohgo in the l3th PSI Conference as an oral paper.(3) Change in current profile has been invvestigated just after the pellet injection. It has been found that, when the pellet-penetration depth is deep enough, current densit … More y on the axis is smaller than that in the periphery. Relation has been investigated between sawtooth oscillation and the profile-change.(4) An ion sensitive probe with grids has been installed in TEXTOR tokamak, and experiments have been started. It was confirmed that ion temperature was higher than electron temperature, Which was consistent with a measured results of heat nlow.(5) Investigation of high Z materials have been in progress. Small pieces of tungsten-coated carbon have been tested with an electron beam facility. The thickness of the coated layr was o.5 and 1.0mm. They are torelated up to 25 MW/m^2. Ten limiter blocks were fabricated with the same way as these small pieces. They will be installed in TEXTOR tokamak in this summer.(6) Fabricadon of Dynamic Ergodic Divertor (DED) was finally approved. Coils and carbon tiles will be installed before the end of l999.Three program of hardware modification have been decided based on the results oftained in this collaboration. Tney are DED,the tungsten limiter of (5), and RF-limiter of (1). This collaboration has explored new larger scale programs on TEXTOR tokamak. Less

(1)对边缘等离子体控制进行了一些实验研究。它们是射频限幅器实验、高Z限幅器实验、弹丸注入实验和惰性气体注入实验，在这些实验中已经取得了一些实验结果。两名德国科学家访问了名古屋大学，并对射频限幅器进行了初步实验。在此基础上，为德国纺织托卡马克设计并制造了一种新型限幅器。(2)研制了一种由钨和碳组成的双限幅器。已发现碳沉积在钨表面。另一方面，钨在碳上的沉积很少，这表明在钨一侧的侵蚀速率如预期的那样小。结果将由Ohgo博士以口头论文的形式在第13届PSI会议上公布。(3)在注射颗粒后，我们刚刚调查了电流分布的变化。结果表明，当弹丸侵彻深度足够大时，电流密度为…轴上的y越多，外围的y就越小。研究了锯齿振荡与轮廓变化之间的关系。(4)在TEXTER托卡马克装置上安装了栅极离子敏感探头，并进行了实验。证实了离子温度高于电子温度，这与热流测量结果一致。(5)高Z材料的研究正在进行中。小块涂有钨的碳已经在电子束设备上进行了测试。涂层厚度分别为0.5 mm和1.0 mm。它们的功率最高可达25 mW/m^2。用与这些小块相同的方法制造了10个限幅块。它们将于今年夏天安装在德克托托卡马克上。(6)最终批准了动态遍历偏滤器(DED)的Fabricadon。线圈和碳砖将在1999年底之前安装完毕，根据这次合作的结果，已经确定了三项硬件改造方案。它们是(5)中的钨限幅剂DED和(1)中的射频限幅剂。这次合作探索了新的更大规模的TEXTOR托卡马克项目。较少

项目成果

Motoi Wada: "Impurity Release from High-Z Test Limiters Immersed in TEXTOR Edge Plasmas" Journal of Nuclear Materials. 241-243. 799-803 (1997)

Motoi Wada：“沉浸在 TEXTOR Edge 等离子体中的高 Z 测试限制器中的杂质释放”核材料杂志。

J.Rapp, L.Koenen et al.: ""Transport Studies of High-Z Elements in Neon Edge Radiation Cooled Dsicharges in TEXTOT-94"" Plasma Physics and Contrlled Fusion. Vol.39. 1615-1634 (1997)

J.Rapp、L.Koenen 等人：“TEXTOT-94 中氖边缘辐射冷却放电中高 Z 元素的传输研究”等离子体物理和受控聚变。

野田信明: "炉心プラズマ中の高Z不純物挙動とプラズマに与えるその影響" 72・10. 987-997 (1997)

野田伸明：“核心等离子体中的高Z杂质行为及其对等离子体的影响”72・10（1997）。

野田 信明: "炉心プラズマ中の高Z不純物挙動とプラズマに与えるその影響" プラズマ・核融合学会誌. 72・10. 987-997 (1997)

Nobuaki Noda：“核心等离子体中的高Z杂质行为及其对等离子体的影响”日本等离子体与聚变科学学会杂志72・10（1997）。

N.Noda, V.Philipps, R.Neu: ""A Review of Recent Experiments on W and High Z Materials as Plasma-Facing Components in Magnetic Fusion Devices"" Journal of Nuclear Materials. Vol.241-243. 227-243 (1997)

N.Noda、V.Philipps、R.Neu：“对 W 和高 Z 材料作为磁聚变装置中面向等离子体组件的最新实验的回顾”《核材料杂志》。