Search Results - "Sugama, H."

Modern gyrokinetic formulation of collisional and turbulent transport in toroidally rotating plasmas by Sugama, H.

“…Collisional and turbulent transport processes in toroidal plasmas with large toroidal flows on the order of the ion thermal velocity are formulated based on…”
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Zonal flow dynamics and control of turbulent transport in stellarators by Xanthopoulos, P, Mischchenko, A, Helander, P, Sugama, H, Watanabe, T-H

“…The relation between magnetic geometry and the level of ion-temperature-gradient (ITG) driven turbulence in stellarators is explored through gyrokinetic theory…”
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Reduction of turbulent transport with zonal flows enhanced in helical systems by Watanabe, T-H, Sugama, H, Ferrando-Margalet, S

“…Gyrokinetic Vlasov simulations of the ion temperature gradient turbulence are performed in order to investigate effects of helical magnetic configurations on…”
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Dynamics of zonal flows in helical systems by SUGAMA, H, WATANABE, T.-H

“…A theory for describing collisionless long-time behavior of zonal flows in helical systems is presented and its validity is verified by gyrokinetic-Vlasov…”
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Benchmark test of drift-kinetic and gyrokinetic codes through neoclassical transport simulations by Satake, S., Idomura, Y., Sugama, H., Watanabe, T.-H.

“…Two simulation codes that solve the drift-kinetic or gyrokinetic equation in toroidal plasmas are benchmarked by comparing the simulation results of…”
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Neoclassical toroidal viscosity calculations in tokamaks using a δf Monte Carlo simulation and their verifications by Satake, S, Park, J-K, Sugama, H, Kanno, R

“…Neoclassical toroidal viscosities (NTVs) in tokamaks are investigated using a δf Monte Carlo simulation, and are successfully verified with a combined analytic…”
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Functional characterization of Musca glutamate- and GABA-gated chloride channels expressed independently and coexpressed in Xenopus oocytes by Eguchi, Y., Ihara, M., Ochi, E., Shibata, Y., Matsuda, K., Fushiki, S., Sugama, H., Hamasaki, Y., Niwa, H., Wada, M., Ozoe, F., Ozoe, Y.

“…Ligand‐gated chloride channels (LGICs) are important targets for insecticides and parasiticides. Genes encoding subunits of two LGICs, a glutamate‐gated…”
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Synthesis of P-chirogenic diphosphine oxides and their use in catalytic asymmetric Diels–Alder reaction by Matsukawa, Satoru, Sugama, Hiroshi, Imamoto, Tsuneo

“…New P-chirogenic phosphine oxides, ( R, R)-1,2-bis(alkylmethylphosphinyl)ethanes (alkyl=1-adamantyl, tert-butyl) and ( S, S)-1,1-bis(…”
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Local momentum balance in electromagnetic gyrokinetic systems by Sugama, H

“…The Eulerian variational formulation is presented to obtain governing equations of the electromagnetic turbulent gyrokinetic system. A local momentum balance…”
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Metamorphosis of plasma turbulence-shear-flow dynamics through a transcritical bifurcation by Ball, R, Dewar, R L, Sugama, H

“…The structural properties of an economical model for a confined plasma turbulence governor are investigated through bifurcation and stability analyses. A close…”
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Time evolutions of information entropies in a one-dimensional Vlasov-Poisson system by Maekaku, K, Sugama, H, Watanabe, T. -H

“…A one-dimensional Vlasov-Poisson system is considered to elucidate how the information entropies of the probability distribution functions of the electron…”
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Vlasov and Drift Kinetic Simulation Methods Based on the Symplectic Integrator by Watanabe, T.-H., Sugama, H.

“…Vlasov and drift kinetic simulation methods based on the symplectic integrators are benchmarked for test problems on the linear and nonlinear Landau dampings…”
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Large Helical Device (LHD) program by FUJIWARA, M, YAMAZAKI, K, SUGAMA, H, ICHIGUCHI, K, MURAKAMI, S, MOTOJIMA, O, YAMAMOTO, J, SATOW, T, YANAGI, N, IMAGAWA, S, TAKAHATA, K, TAMURA, H, OKAMOTO, M, NISHIMURA, A, KOMORI, A, INOUE, N, NODA, N, SAGARA, A, KUBOTA, Y, AKAISHI, N, SATOH, S, TANAHASHI, S, CHIKARAISHI, H, TODOROKI, J, MITO, T, YAMADA, S, YAMAGUCHI, S, SUDO, S, SATO, K. N, WATARI, T, KURODA, T, KANEKO, O, OHKUBO, K, KITAGAWA, S, AMANO, T, ANDO, A, IDEI, H, TSUMORI, K, KUBO, S, KUMAZAWA, R, MUTOH, T, OKA, Y, SATO, M, SEKI, T, SHIMOZUMA, T, WATANABE, T, TAKEIRI, Y, HAMADA, Y, NARIHARA, K, KAWAHATA, K, FUJISAWA, S, HIDEKUMA, S, MINAMI, T, YAMADA, I, EJIRI, A, TANAKA, K, HAYASHI, T, SANUKI, H, NAKAJIMA, N, ITOH, K

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Polarization and magnetization in collisional and turbulent transport processes by Sugama, H, Matsuoka, S, Nunami, M

“…Expressions of polarization and magnetization in magnetically confined plasmas are derived, which include full expansions in the gyroradius to treat effects of…”
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Enhancement of Residual Zonal Flows in Helical Systems with Equilibrium Radial Electric Fields by Sugama, H., Watanabe, T.-H.

“…The collisionless response of the zonal‐flow potential to the initial particle distribution and turbulence source is theoretically described for helical…”
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Energy exchange between electrons and ions in ion temperature gradient turbulence by Kato, T, Sugama, H, Watanabe, T. -H, Nunami, M

“…Phys. Plasmas 31, 062510 (2024) Microturbulence in magnetic confined plasmas contributes to energy exchange between particles of different species as well as…”
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The Eulerian variational formulation of the gyrokinetic system in general spatial coordinates by Sugama, H, Matsuoka, S, Nunami, M, Satake, S

“…The Eulerian variational formulation of the gyrokinetic system with electrostatic turbulence is presented in general spatial coordinates by extending our…”
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Experimental and numerical studies on liquid bridge formed among three spheres by Murase, Kazuo, Mochida, Tsuyoshi, Sugama, Hiroyuki

“…Static characteristics and dynamic strength of a liquid bridge formed between vertically arranged two spheres and among three spheres were experimentally and…”
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Eulerian variational formulations and momentum conservation laws for kinetic plasma systems by Sugama, H, Nunami, M, Satake, S, Watanabe, T. -H

“…The Eulerian variational principle for the Vlasov-Poisson-Amp\`{e}re system of equations in a general coordinate system is presented. The invariance of the…”
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Benchmark of the Local Drift-kinetic Models for Neoclassical Transport Simulation in Helical Plasmas by Huang, B, Satake, S, Kanno, R, Sugama, H, Matsuoka, S

“…The benchmarks of the neoclassical transport codes based on the several local drift-kinetic models are reported here. Here, the drift-kinetic models are ZOW,…”
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