Search Results - "Aiba, Nobuyuki"

Simulations tackle abrupt massive migrations of energetic beam ions in a tokamak plasma by Bierwage, Andreas, Shinohara, Kouji, Todo, Yasushi, Aiba, Nobuyuki, Ishikawa, Masao, Matsunaga, Go, Takechi, Manabu, Yagi, Masatoshi

“…In the late 1990s, fusion scientists at the Japanese tokamak JT-60U discovered abrupt large-amplitude events during beam-driven deuterium plasma experiments. A…”
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A study on ohmic plasma initiation for JA DEMO by Sugiyama, Shota, Shinya, Kichiro, Utoh, Hiroyasu, Aiba, Nobuyuki, Sakamoto, Yoshiteru

“…•Available loop voltage and prefill gas pressure for plasma initiation in JA DEMO are clarified.•Conducting shell does not necessarily hinder plasma…”
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Evolution of a laser wake cavity in a MCF plasma by Bierwage, Andreas, Esirkepov, Timur Zh, Koga, James K., Pirozhkov, Alexander S., Aiba, Nobuyuki, Huang, Kai, Kando, Masaki, Kiriyama, Hiromitsu, Matsuyama, Akinobu, Shinohara, Kouji, Yagi, Masatoshi, Yun, Gunsu S.

“…A laser pulse focused to relativistic intensity inside a magnetically confined fusion (MCF) plasma plows away all electrons in its path. The ensuing Coulomb…”
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Conservative global gyrokinetic toroidal full- f five-dimensional Vlasov simulation by Idomura, Yasuhiro, Ida, Masato, Kano, Takuma, Aiba, Nobuyuki, Tokuda, Shinji

“…A new conservative global gyrokinetic toroidal full- f five-dimensional Vlasov simulation (GT5D) is developed using a novel non-dissipative conservative finite…”
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Alfvén acoustic channel for ion energy in high-beta tokamak plasmas by Bierwage, Andreas, Aiba, Nobuyuki, Shinohara, Kouji

“…When the plasma beta (ratio of thermal to magnetic pressure) in the core of a tokamak is raised to values of several percent, as required for a thermonuclear…”
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Unveiling the structure and dynamics of peeling mode in quiescent high-confinement tokamak plasmas by Kamiya, Kensaku, Itoh, Kimitaka, Aiba, Nobuyuki, Oyama, Naoyuki, Honda, Mitsuru, Isayama, Akihiko

“…Quiescent high-confinement mode plasmas with edge-harmonic oscillations do not exhibit the explosive instabilities associated with edge-localized modes…”
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MUSES: A nonlinear magnetohydrodynamics discontinuous Galerkin code for fusion plasmas by Shiroto, Takashi, Matsuyama, Akinobu, Aiba, Nobuyuki

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Excitation of flow-stabilized resistive wall mode by coupling with stable eigenmodes in tokamaks by Aiba, Nobuyuki, Hirota, Makoto

“…In a rotating toroidal plasma surrounded by a resistive wall, it is shown that linear MHD instabilities can be excited by couplings between the resistive wall…”
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A mass-energy-conserving discontinuous Galerkin scheme for the isotropic multispecies Rosenbluth–Fokker–Planck equation by Shiroto, Takashi, Matsuyama, Akinobu, Aiba, Nobuyuki, Yagi, Masatoshi

“…Structure-preserving discretization of the Rosenbluth–Fokker–Planck equation is still an open question especially for unlike-particle collision. In this paper,…”
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Parameter study of L–H transition for plasma operation scenario development in JA DEMO by Sugiyama, Shota, Aiba, Nobuyuki, Asakura, Nobuyuki, Hayashi, Nobuhiko, Sakamoto, Yoshiteru

“…We have investigated the L–H transition in JA DEMO, a design concept of the steady-state tokamak fusion demonstration reactor. We develop an L–H transition…”
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Simulation study on the motion of the pressure perturbation in an axisymmetric toroidal system by AIBA, Nobuyuki, TOKUDA, Shinji, HAYASHI, Takaya, WAKATANI, Masahiro

“…In tokamaks, it is observed that an ablated and ionized pellet moves toward the low field side of the torus. This phenomenon can be considered as the…”
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Kinetic-magnetohydrodynamic hybrid simulation of infernal modes in circular tokamak plasmas with effects of kinetic thermal ions by Sato, M., Todo, Y., Aiba, N., Takechi, M.

“…Abstract Effects of the kinetic thermal ions (KTIs) on ideal infernal modes and resistive infernal modes have been investigated by using magnetohydrodynamic…”
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Simulation study of interaction between energetic particles and magnetohydrodynamic modes in the JT-60SA inductive scenario with a flat q≈1 profile by Adulsiriswad, P., Todo, Y., Sato, M., Aiba, N., Narita, E., Wang, H., Idouakass, M., Wang, J.

“…Abstract Interactions between energetic particles (EPs), an internal kink mode, and other magnetohydrodynamic (MHD) instabilities in the inductive scenario of…”
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ECCD system design activities for JA DEMO by Oda, Yasuhisa, Nagasaki, Kazunobu, Fukuyama, Atsushi, Maekawa, Takashi, Idei, Hiroshi, Seino, Tomohiro, Yanagihara, Kota, Aiba, Nobuyuki, Yajima, Satoru, Shinya, Takahiro, Ikeda, Ryosuke, Kajiwara, Ken, Kubo, Shin, Tobita, Kenji, Sugiyama, Shota, Uto, Hiroyasu, Sakamoto, Yoshiteru

“…ECCD system design activities for JA DEMO is in progress. Activities contains physical analysis, launcher design, and RF power plant design. The physical…”
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Extension of the Newcomb equation into the vacuum for the stability analysis of tokamak edge plasmas by Aiba, Nobuyuki, Tokuda, Shinji, Ishizawa, Tomoko, Okamoto, Masao

“…The formulation for solving numerically the two-dimensional Newcomb equation has been extended to calculate the vacuum energy integral by using a vector…”
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Eigenstructure-preserving scheme for a hyperbolic system by Shiroto, Takashi, Matsuyama, Akinobu, Aiba, Nobuyuki

“…A hyperbolic system must have a set of linearly independent eigenvectors and corresponding real eigenvalues. In numerical simulations, however, the eigenvalues…”
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A mass-energy-conserving discontinuous Galerkin scheme for the isotropic multispecies Rosenbluth--Fokker--Planck equation by Shiroto, Takashi, Matsuyama, Akinobu, Aiba, Nobuyuki, Yagi, Masatoshi

“…Structure-preserving discretization of the Rosenbluth-Fokker-Planck equation is still an open question especially for unlike-particle collision. In this paper,…”
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Toroidal and slab ETG instability dominance in the linear spectrum of JET-ILW pedestals by Parisi, Jason F, Parra, Felix I, Roach, Colin M, Giroud, Carine, Dorland, William, Hatch, David R, Barnes, Michael, Hillesheim, Jon C, Aiba, Nobuyuki, Ball, Justin, Ivanov, Plamen G, Contributors, JET

“…Local linear gyrokinetic simulations show that electron temperature gradient (ETG) instabilities are the fastest growing modes for $k_y \rho_i \gtrsim 0.1$ in…”
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Nine patients with hepatocellular carcinoma surviving for more than six years after treatment, including two patients who have survived without recurrence after hepatic lobectomy by Watanabe, A, Wakabayashi, H, Harada, R, Nambu, S, Atarashi, Y, Yasumura, S, Aiba, N, Okada, K, Shimizu, Y, Takahara, T, Higuchi, K, Saito, S

“…Of patients treated for hepatocellular carcinoma (HCC) accompanied by liver cirrhosis at our University Hospital between 1985 and 1990, clinical background…”
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