能本にあらわれた「ものづくし」について : 能の主題と機智性の問題の一考察

departmental bulletin pape

児童と生徒の主体的・対話的な学びを支援できる教員のファシリテーション能力の育成 ―教員養成段階における授業開発―

P(論文)教育・実践研究departmental bulletin pape

Application of Microwave Heating to Gluing of Wood with Adhesives

departmental bulletin pape

Effects of the resonance modification by electron cyclotron current drive on the linear and nonlinear dynamics of energetic particle driven magnetohydrodynamics modes in Heliotron J

ORCID　0000-0001-7332-037XThis study investigates the effects of electron cyclotron current drive (ECCD) on the linear and nonlinear dynamics of energetic-particle (EP)-driven magnetohydrodynamics (MHD) instability (mode) in Heliotron J (HJ), using MEGA, a nonlinear hybrid EP-MHD simulation code. The effects of ECCD are included through the modification of the equilibrium magnetic field. Five MHD equilibria with plasma currents (Ip) of −2.00, −1.00, 0.00, 0.50, and 1.00 kA are considered, where negative and positive Ip represent counter and co-ECCD, respectively. To account for the EP finite charge-exchange loss observed in HJ, a bump-on-tail velocity distribution is assumed for EP. The study finds that the stabilization trends in terms of the linear growth rate (γω−1A ) are qualitatively similar to the FAR3D linear simulation and experimental results. In addition to the enhancements of the local magnetic shear and continuum damping by ECCD as proposed in previous studies, the study suggests that changes in the linear EP and shear Alfvén wave resonance are another important factor, especially for the n/m = 1/2 mode. The study shows that in the currentless equilibrium, the high-velocity toroidicity-induced resonance between the n/m = 1/2 mode and the co-passing EP (L = −1) has the highest EPjournal articl

昭和19年度国家資金●成形式案ニツヰテ

昭和19年5月8日　※●は判読不能othe

Preparation and Characterization of Silica Films on PBT Substrate by Dip Coating with PDMS/PHPS Solution

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Effects of the resonance modification by electron cyclotron current drive on the linear and nonlinear dynamics of energetic particle driven magnetohydrodynamics modes in Heliotron J

This study investigates the effects of electron cyclotron current drive (ECCD) on the linear and nonlinear dynamics of energetic-particle (EP)-driven magnetohydrodynamics (MHD) instability (mode) in Heliotron J (HJ), using MEGA, a nonlinear hybrid EP-MHD simulation code. The effects of ECCD are included through the modification of the equilibrium magnetic field. Five MHD equilibria with plasma currents ( $I_\textrm p$ ) of −2.00, −1.00, 0.00, 0.50, and 1.00 kA are considered, where negative and positive $I_\textrm p$ represent counter and co-ECCD, respectively. To account for the EP finite charge-exchange loss observed in HJ, a bump-on-tail velocity distribution is assumed for EP. The study finds that the stabilization trends in terms of the linear growth rate ( $\gamma \omega_A^{-1}$ ) are qualitatively similar to the FAR3D linear simulation and experimental results. In addition to the enhancements of the local magnetic shear and continuum damping by ECCD as proposed in previous studies, the study suggests that changes in the linear EP and shear Alfvén wave resonance are another important factor, especially for the $n/m = 1/2$ mode. The study shows that in the currentless equilibrium, the high-velocity toroidicity-induced resonance between the $n/m = 1/2$ mode and the co-passing EP ( $L = -1$ ) has the highest EP energy transfer rate, but is located slightly below the NBI injection velocity. The co-ECCD and cntr-ECCD can shift this resonance into higher and lower velocity regions, respectively. This can lead to resonance removal for co-ECCD, while cntr-ECCD can initially increase the number of resonant EPs for a small value of shift. If the shift of the resonance by cntr-ECCD is sufficiently large, the study observes stabilization due to the reduction in the EP population in the low-velocity region. The study also finds that changes in resonance affect nonlinear dynamics such as EP transport and frequency chirping. The convective transport of the co- and counter-passing EPs can be controlled, which can only be achieved for energetic-particle-mode due to the asymmetry in the resonance velocity between co- and cntr-passing EPs. The changes in the frequency chirping from the downward chirping branch to the upward chirping branch can also be explained by the changes in the resonance velocity caused by ECCD

First Application of 3D Peripheral Plasma Transport Code EMC3-EIRENE to Heliotron J

0000-0002-5730-4158The 3D peripheral plasma and neutral transport code, EMC3-EIRENE was applied to the Heliotron J with a wide and flexible controllability of magnetic configuration. This code requires a three-dimensional (3D) grid with high resolution in the peripheral plasma region to reproduce the fine plasma structure. The grid generation tool, FLARE, was utilized to create the grid in conjunction with the code developed to arbitrarily set the outer boundary of the peripheral grid. After setting up the 3D grid, we carried out the EMC3-EIRENE calculation successfully for the first time in the Heliotron J's standard configuration. In addition, the convergence of the iterative calculation and the effects of different grid resolutions upon the calculation were investigated. A good numerical convergence was obtained, and the influence of resolution was observed in the electron density in the divertor region.journal articl