Kiyomasa WATANABE
Kiyomasa WATANABE
Professor, Doctor of Engineering
High density plasma physics research devision,
National Institute for Fusion Science, Departmnt of Helical Plasma Research,
National Instsitutes of Natural Siences, Japan
[Reaseach subjects]
# Experimental study on Magnetro-Hydro-Dynamics (MHD) instabilities
# Experimental and numerical studies on the MHD equilibrium and transport in high beta helical plasmas
# Development of the bootstrap current (BS) estimation code and study of the BS current effects on helical plasmas
# On current decay mechanism during the discharge termination in the tokamak disruption discharges
# List of Published papers
[Students' Published papers as the 1st author] #) corresponds to Master's course students' research results.
1) H.Sasao, K.Y.Watanabe, S.Inagaki et al., "The Study on the Neoclassical Transport Analysis using ECE Measured Temperature Profiles in the LHD Long Pulse Plasma", J. Plasma Fusion Res. SERIES, Vol.3 (2000) pp.431-435.
2) H.Sasao, S.Inagaki, Y.Nagayama, P.C.deVries, K.Kawahata, K.Y.Watanabe, et al. "ECE diagnostics in the high density plasma in LHD", Fusion Engineering and Design, Vol.53 (2001) pp.153-160.
3) T.Yamaguchi, K.Y.Watanabe, S.Sakakibara et al. "Measurement of Anisotropic Pressure using Magnetic Measurements in LHD", Nuclear Fusion, Vol.45 pp.L33-L36.
4) T.Yamaguchi, K.Y.Watanabe, S.Sakakibara et al. "New Calibration Method of Magnetic Measurements based on the MHD Equilibrium with the Ergodic Region", Plasma Fusion Research, Vol.1, (2006) 011 (2pages).
5) G.Motojima, H.Okada, K.Y.Watanabe et al., "Dependence of Toroidal Current on Bumpy Field Component in Heliotron J", Fusion Science and Technology, Vol.51 (2007) pp.122-128.
6) G.Motojima, K.Nagasaki, M.Nosaku, H.Okada, K.Y.Watanabe et al., "Control of Non-inductive Current in Heliotron J", Nuclear Fusion, Vol.47 (2007) pp.1045-1052.
7) G.Motojima, S.Yamamoto, H.Okada, S.Sakakibara, K.Y.Watanabe et al., "Effect of Toroidal Current on Rotational Transform Profile by MHD Activity Measurement in Heliotron J", Plasma Fusion Research, Vol.3 (2008) S1067 (6pages).
8) R.Seki, Y.Matsumoto, Y.Suzuki, K.Y.Watanabe and M.Itagaki, "Particle Orbit Analysis in the Finite Beta Plasma of the Large Helical Device using Real Coordinates", Plasma Fusion Research, Vol.3 (2008) 016 (9 pages).
9) A.Matsuyama, M.Yu.Isaev, K.Y.Watanabe et al., "Moment Approach to the Bootstrap Current in Nonaxisymmetric Toroidal Plasmas using df Monte Carlo Methods", Physics of Plasmas, Vol.16 (2009) 052501 (9 pages).
10) A.Matsuyama, K.Hanatani, K.Y.Watanabe and N.Nakajima, "A Monte-Carlo-Based Calculation of Neoclassical Flows and Viscosity for Nonaxisymmetric Toroidal Plasmas", Contrib. Plasma Phys. Vol.50 (2010) pp.635-638.
11) Y.Shibata, K.Y.Watanabe, M.Okamoto et al., "Study of Current Decay Time during Disruption in JT-60U Tokamak", Nuclear Fusion, Vol.50 (2010) 025015 (7 pages).
12) R.Seki, Y.Matsumoto, Y.Suzuki, K.Y.Watanabe, K.Hamamatsu and M.Itagaki, "Monte-Carlo Study based on Real Coordinates for Perpendicularly Injected High-Energy Ions in the LHD High-Beta Plasma", Plasma Fusion Research, Vol.5 (2010) 014 (3 pages).
13) Y.Shibata, K.Y.Watanabe, N.Ohno et al., "Study of Plasma Current Decay in the Initial Phase of High Poloidal Beta Disruptions in JT-60U", Plasma Fusion Research, Vol.6 (2011) 1302136 (7pages).
14) Y.Asahi, Y.Suzuki, K.Y.Watanabe and W.A.Cooper, "MHD Equilibrium Analysis with Anisotropic Pressure in LHD", Plasma Fusion Research, Vol.6 (2011) 2403123 (4pages).
16) J.Varela, K.Y.Watanabe, N.Nakajima, S.Ohdachi, L.Garcia and J.A.Mier, "Ballooning Modes Instabilities in Outward LHD Configurations", Plasma Fusion Research, Vol.6 (2011) 1403013 (5pages).
17) Y.Takemura, S.Sakakibara, Y.Narushima, M.Okamoto, K.Y.Watanabe et al., "Mode locking phenomena observed near the stability boundary of the ideal interchange mode of LHD", Nuclear Fusion, Vol.52 (2012) 102001 (4pages).
18) J.Varela, K.Y.Watanabe and S.Ohdachi, "The internal disruption as hard Magnetohydrodynamic limit of 1/2 sawtooth like activity in large helical device", Physics of Plasmas, Vol.19 (2012) 082512 (11pages).
19) J.Varela, L.Garcia, S.Ohdachi, K.Y.Watanabe, and R.Sanchez, "Internal disruptions and sawtooth like activity in Large Helical Device", Physics of Plasmas, Vol.19 (2012) 082501 (11pages).
20) S.Kawakami, Y.Shibata, K.Y.Watanabe et al., "Effect of resistivity profile on current decay time of initial phase of current quench in neon-gas-puff inducing disruptions of JT-60U", Physics of Plasmas, Vol.20 (2013) 112507 (6pages).
21) Y.Asahi, Y.Suzuki, K.Y.Watanabe, and W.A.Cooper, "Development of an identification method of pressure anisotropy based on equilibrium analysis and magnetics", Physics of Plasmas, Vol.20 (2013) 022503 (7pages).
22) R.Ueda, M.Sato, K.Y.Watanabe et al., "Analysis Method for the Low-Order Resistive Interchange Instability in LHD with Stochastic Magnetic Field Line Structure", Plasma Fusion Research, Vol.8 (2013) 2403157 (5pages).
23) Y.Takemura, S.Sakakibara, K.Y.Watanabe et al., "Rotation of Interchange Instability in the Large Helical Device", Plasma Fusion Research, Vol.8 (2013) 1402123 (6pages).
24) R.Ueda, K.Y.Watanabe, Y.Matsumoto, M.Itagaki, M.Sato and S.Oikawa, "Characteristics of magnetic island formation due to resistive interchange instability in helical plasma", Physics of Plasmas, Vol.21 (2014) 052502 (8pages).
25) R. Soga, T. Tokuzawa, K.Y. Watanabe et al., "Developments of frequency comb microwave reflectometer for the interchange mode observations in LHD plasma", Journal of Instrumentation Vol.11 (2016) c02009, (5pages).