2001 Fiscal Year Final Research Report Summary
Advanced Diagnostics of particle transport by using tracer-encapsulated pellet Injection
| Project/Area Number |
10480109
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | Natiomal Institute for Fusion Science |
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Principal Investigator |
SUDO Shigeru Natiomal Institute for Fusion Science Department of Large Helical Device Project, Professor, 大型ヘリカル研究部, 教授 (50142302)
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| Co-Investigator(Kenkyū-buntansha) |
OZAKI Tetsuo Natiomal Institute for Fusion Science Department of Large Helical Device Project,Associate Professor, 大型ヘリカル研究部, 助教授 (50183033)
KONDO Katusmi Kyuto University,Graduate School of Energy science,Professor, 大学院・エネルギー科学研究部, 教授 (30026314)
MATSUOKA Keisuke Natiomal Institute for Fusion Science Department of Large Helical Device Project,Professor, 大型ヘリカル研究部, 教授 (70023736)
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| Project Period (FY) |
1998 – 2001
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| Keywords | Particle transport / Tracer-encapsulated pellet / Impurity transport / Pellet ablation / Local transport / TESPEL |
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| Research Abstract |
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.
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[Publications] 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)
Description
「研究成果報告書概要(和文)」より
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[Publications] S. Sudo, N, Tamura, K. Khlopenkov, S. Muto, H. Funaba, I. Viniar, V. Sergeev, K. Sato, K. Ida, K. Kawahata, A. Komori, K. Matsuoka, K. Narihara, S. Okamura, N. Ohyabu, K. Tanaka, O. Motojima: "Particle transport diagnostics on CMS and LHD with tracer-encapsulated solid pellet injection"Plasma Physics and Controlled Fusion,. Vol, 44. 129-135 (2002)
Description
「研究成果報告書概要(欧文)」より
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[Publications] S. Sudo, Y. Nagayama, M. Emoto, M. Goto, Y. Hamada, K. Ida, T. Ido, H. Iguchi, S. Inagaki, M. Isobe, K. Kawahata, K. KMopenkov, S. Masuzaki, T. Minami, S. Morita, S. Muto, H. Nakanishi, K. Narihara, A., Nishizawa, S. Ohdachi, M. Osakabe, T. Ozaki, B. J. Peterson, S. Sakakibara, M. Sasao, K. Sato, M. Shoji, K. Tanaka, K. Toi, T. Tokuzawa, K. Watanabe, T. Watanabe, I. Yamada, LHD Experiment Group: "Overview of LHD diagnostics'"Review of Scientific Instrument:. Vol.72. 483-491 (2001)
Description
「研究成果報告書概要(欧文)」より
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[Publications] S. Sudo, K. Khlopenkov, M. Yanagisawa, K. Matsuoka, S. Okamura, C. Takahashi, R. Akiyama, A. Fujisawa, K. Ida, H. Idei, H, Iguchi, M. Isobe, S. Kado, K. Kondo, S. Kubo, H. Kuramoto, T. Minami, S. Morita, S. Nishimura, M. Osakabe, M. Sasao, B. Peterson, K. Tanaka, K. Toi, Y. Yoshimura^: "Particle Transport Study with Tracer-encapsulated Solid Pellet Injection'."Proc. of 17th IAEA Fusion Energy Conference (Yokohama, Japan, 1998) IAEA-CN ?69/EXP1/18. Vol.39 No.9. (NIFS Reprot-560.1-4.) (1999)
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「研究成果報告書概要(欧文)」より
