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Idomura, Yasuhiro
Journal of Computational Physics, 313, p.511 - 531, 2016/05
Times Cited Count：42 Percentile：92.24(Computer Science, Interdisciplinary Applications)A new hybrid kinetic electron model is developed for electrostatic full-f gyrokinetic simulations of the ion temperature gradient driven trapped electron mode (ITG-TEM) turbulence at the ion scale. In the model, a full kinetic electron model is applied to the full-f gyrokinetic equation, the multi-species linear Fokker-Planck collision operator, and an axisymmetric part of the gyrokinetic Poisson equation, while in a non-axisymmetric part of the gyrokinetic Poisson equation, turbulent fluctuations are determined only by kinetic trapped electrons responses. By using this approach, the so-called 
mode is avoided with keeping important physics such as the ITG-TEM, the neoclassical transport, the ambipolar condition, and particle trapping and detrapping processes. The model enables full- f gyrokinetic simulations of ITG-TEM turbulence with a reasonable computational cost.
Imazawa, Ryota; Kawano, Yasunori; Itami, Kiyoshi
Journal of Computational Physics, 292, p.208 - 214, 2015/07
Times Cited Count：6 Percentile：37.63(Computer Science, Interdisciplinary Applications)no abstracts in English
Ito, Kei; Kunugi, Tomoaki*; Ohno, Shuji; Kamide, Hideki; Ohshima, Hiroyuki
Journal of Computational Physics, 273, p.38 - 53, 2014/09
Times Cited Count：24 Percentile：78.45(Computer Science, Interdisciplinary Applications)Jolliet, S.; McMillan, B. F.*; Villard, L.*; Vernay, T.*; Angelino, P.*; Tran, T. M.*; Brunner, S.*; Bottino, A.*; Idomura, Yasuhiro
Journal of Computational Physics, 231(3), p.745 - 758, 2012/02
Times Cited Count：14 Percentile：61.38(Computer Science, Interdisciplinary Applications)Honda, Mitsuru; Fukuyama, Atsushi*
Journal of Computational Physics, 227(5), p.2808 - 2844, 2008/02
Times Cited Count：19 Percentile：67.01(Computer Science, Interdisciplinary Applications)
Vlasov code and its comparison to gyrokinetic 
particle-in-cell codeIdomura, Yasuhiro; Ida, Masato; Tokuda, Shinji; Villard, L.*
Journal of Computational Physics, 226(1), p.244 - 262, 2007/09
Times Cited Count：32 Percentile：77.93(Computer Science, Interdisciplinary Applications)A new conservative gyrokinetic full- Vlasov code is developed using a finite difference operator which conserves both the 
and 
norms. The growth of numerical oscillations is suppressed by conserving the norm, and the code is numerically stable and robust in a long time simulation. In the slab ion temperature gradient driven (ITG) turbulence simulation, the energy conservation and the entropy balance relation are confirmed, and solutions are benchmarked against a conventional particle-in-cell (PIC) code. The results show that the exact particle number conservation and the good energy conservation in the conservative Vlasov simulation are advantageous for a long time micro-turbulence simulation. In the comparison, physical and numerical effects of the 
nonlinearity are clarified for the Vlasov and PIC simulations.
Utsumi, Takayuki*; Yabe, Takashi*; Koga, J. K.; Aoki, Takayuki*; Sekine, Masatoshi*; Ogata, Yoichi*; Matsunaga, Eiichi*
Journal of Computational Physics, 196(1), p.1 - 7, 2004/05
Times Cited Count：3 Percentile：20.29(Computer Science, Interdisciplinary Applications)no abstracts in English
