Power Balance Estimation in Long Duration Discharges on QUEST
Abstract
Fully non-inductive plasma start-up was successfully achieved by using a well-controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3–5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70%–90% of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. Lastly, the power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components.
- Authors:
-
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- Kyushu Univ. (Japan). Research Inst. for Applied Mechanics
- Kyushu Univ. (Japan). Interdisciplinary Graduate School of Engineering Science
- Tokai Univ., Kumamoto (Japan). School of Industrial Engineering
- Kyushu Univ. (Japan). Graduate School of Technology
- Univ. of Tokyo (Japan). Graduate School of Frontier Science
- Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Carnegie Inst. of Washington, Argonne, IL (United States). Dept. of Aeronautics & Astronautics
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE; Collaborative Research Program of the Research Institute for Applied Mechanics, Kyushu University; Foresight Program in the Field of Plasma Physics (No. 11261140328).
- OSTI Identifier:
- 1335688
- Grant/Contract Number:
- JSPS-NRF-NSFC -A3
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plasma Science and Technology
- Additional Journal Information:
- Journal Volume: 18; Journal Issue: 11; Journal ID: ISSN 1009-0630
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; steady state operation; spherical tokamak; plasma wall interaction; power balance
Citation Formats
Hanada, K., Zushi, H., Idei, H., Nakamura, K., Ishiguro, M., Tashima, S., Kalinnikova, E. I., Nagashima, Y., Hasegawa, M., Fujisawa, A., Higashijima, A., Kawasaki, S., Nakashima, H., Mitarai, O., Fukuyama, A., Takase, Y., Gao, X., Liu, H., Qian, J., Ono, M., and Raman, R. Power Balance Estimation in Long Duration Discharges on QUEST. United States: N. p., 2016.
Web. doi:10.1088/1009-0630/18/11/03.
Hanada, K., Zushi, H., Idei, H., Nakamura, K., Ishiguro, M., Tashima, S., Kalinnikova, E. I., Nagashima, Y., Hasegawa, M., Fujisawa, A., Higashijima, A., Kawasaki, S., Nakashima, H., Mitarai, O., Fukuyama, A., Takase, Y., Gao, X., Liu, H., Qian, J., Ono, M., & Raman, R. Power Balance Estimation in Long Duration Discharges on QUEST. United States. https://doi.org/10.1088/1009-0630/18/11/03
Hanada, K., Zushi, H., Idei, H., Nakamura, K., Ishiguro, M., Tashima, S., Kalinnikova, E. I., Nagashima, Y., Hasegawa, M., Fujisawa, A., Higashijima, A., Kawasaki, S., Nakashima, H., Mitarai, O., Fukuyama, A., Takase, Y., Gao, X., Liu, H., Qian, J., Ono, M., and Raman, R. Fri .
"Power Balance Estimation in Long Duration Discharges on QUEST". United States. https://doi.org/10.1088/1009-0630/18/11/03. https://www.osti.gov/servlets/purl/1335688.
@article{osti_1335688,
title = {Power Balance Estimation in Long Duration Discharges on QUEST},
author = {Hanada, K. and Zushi, H. and Idei, H. and Nakamura, K. and Ishiguro, M. and Tashima, S. and Kalinnikova, E. I. and Nagashima, Y. and Hasegawa, M. and Fujisawa, A. and Higashijima, A. and Kawasaki, S. and Nakashima, H. and Mitarai, O. and Fukuyama, A. and Takase, Y. and Gao, X. and Liu, H. and Qian, J. and Ono, M. and Raman, R.},
abstractNote = {Fully non-inductive plasma start-up was successfully achieved by using a well-controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3–5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70%–90% of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. Lastly, the power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components.},
doi = {10.1088/1009-0630/18/11/03},
journal = {Plasma Science and Technology},
number = 11,
volume = 18,
place = {United States},
year = {Fri Oct 28 00:00:00 EDT 2016},
month = {Fri Oct 28 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
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