Advanced Diagnostics of particle transport by using tracer-encapsulated pellet Injection

使用示踪剂封装颗粒注射对颗粒传输进行高级诊断

• 批准号: 10480109
• 负责人: SUDO Shigeru
• 金额: $ 7.36万
• 依托单位: Natiomal 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: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10480109/
• 关键词: Particle transport; Tracer-encapsulated pellet; Impurity transport; Pellet ablation; Local transport; TESPEL; 粒子輸送; トレーサー内蔵ペレット; 局所粒子輸送係数; リチウム荷電交換再結合光; ペレット溶発光

A method using a flexible tracer-encapsulated solid pellet (TESPEL) has been developed for transport study on the Large Helical Device (LHD). The method has flexibility in the selection both of size of the pellet and of the tracer material. The size of the outer layer made of polystyrene can be changed from 300 \JLTO. to 900 \Lia in diameter. This contributes to the wide selection of the deposition location of the tracer particles in the plasma. The flexibility in the selection of the tracer material contributes to the appropriate selection of the atoms according to the plasma parameters such as Te in the concerned plasma. The amount of the tracer particles (typical number is 1017 particles) can be changed easily by more than a factor of 50. TESPEL consists of polystyrene as an outer part and another material as an inner core. At first, it was confirmed at the CHS that the tracer of lithium was deposited locally in the plasma. Moreover, the behavior of the tracer particles was observed clearly by charge exchange recombination spectroscopy using a heating neutral beam. TESPEL was also injected into the LHD. In this case, the Ka line and the other spectra in the vacuum ultra violet region of titanium were observed without necessity of a neutral beam. Those multi-chord data with temporal resolution of about 20 ms were compared with the impurity transport simulation with the codes such as MIST and STRAHL. Thus, the particle diffusion coefficient and the inward pinch velocity were obtained for various plasmas. Those results have shown that this method is promising.

发展了一种利用柔性示踪剂包封固体小球（TESPEL）研究大螺旋装置（LHD）输运特性的方法。该方法在选择颗粒和示踪剂材料的尺寸方面具有灵活性。由聚苯乙烯制成的外层的尺寸可以从300 μ JLTO改变。直径为900 μ l。这有助于在等离子体中广泛选择示踪剂颗粒的沉积位置。示踪剂材料选择的灵活性有助于根据等离子体参数（例如相关等离子体中的Te）适当选择原子。示踪剂颗粒的量（典型数量为1017个颗粒）可以容易地改变超过50倍。TESPEL由聚苯乙烯作为外部部件和另一种材料作为内核组成。首先，在CHS证实了锂的示踪剂局部沉积在等离子体中。此外，使用加热中性束的电荷交换复合光谱清楚地观察到示踪粒子的行为。TESPEL也被注入LHD。在这种情况下，K α线和其他光谱在真空紫外区的钛被观察到，而不需要一个中性束。利用时间分辨率约为20 ms的多弦数据与MIST、STRAHL等程序的杂质输运模拟结果进行了比较。从而得到了不同等离子体的粒子扩散系数和向内收缩速度。这些结果表明，这种方法是有前途的。

项目成果

S.Sudo, Y.Nagayama, M.Emoto, M.Goto, Y.Hamada, K.Ida, T.Ido, H.Iguchi, S.Inagaki, M.Isobe, K.Kawahata, K.Khlopenkov, et al.: ""Overview of LHD diagnostics""Review of Scientific Instruments. 72巻1号. 483-491 (2001)

S.Sudo、Y.Nagayama、M.Emoto、M.Goto、Y.Hamada、K.Ida、T.Ido、H.Iguchi、S.Inagaki、M.Isobe、K.Kawahata、K.Khlopenkov 等.：“LHD 诊断概述”《科学仪器评论》第 72 卷第 1. 483-491 期（2001 年）

須藤 滋,K.Khlopenkov等: "Particle Transport Study with Traccr-Encapsulated Solid Pellet Injection" Proc.17th IAEA Fusion Energy Conferunce. IAEA-CN69 EXP1/18. 1-4 (1998)

Shigeru Sudo、K.Khlopenkov 等人：“Traccr 封装固体颗粒注射的粒子输运研究”Proc.17th IAEA 聚变能源会议 IAEA-CN69 EXP1/18 (1998)。

V. Yu. Sergeev, R. K. Janev, M. J. Rakovic, S. Zou,. N. Tamura, K. V. Khlopenkov, S. Sudo: "0ptimization of CXRS TESPEL diagnostics on LHD in the vilsible spectral range"Plasma Physics and Controlled Fusion,. Vol. 44. 277-292 (2002)

V.于。

K.Khlopenkov,須藤 滋: "Production and acceleration of tracer encapsulated solid pellets for particle transport diagnostics" Review of Science Instruments. 69巻9号. 3194-3198 (1998)

K.Khlopenkov、Shigeru Sudo：“用于粒子传输诊断的示踪剂封装固体颗粒的生产和加速”科学仪器评论，第 69 卷，第 9 期。3194-3198 (1998)

S.Sudo, N.Tamura, K.Khlopenkov, et al.: "Particle transport diagnostics on CHS and LHD with tracer-encapsulated solid pellet injection"Plasma Physics and Controlled Fusion. 44巻. 129-135 (2002)

S.Sudo、N.Tamura、K.Khlopenkov 等人：“使用示踪剂封装的固体颗粒注射对 CHS 和 LHD 进行粒子传输诊断”等离子物理和受控融合。 44. 129-135 (2002)