Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Otobe, Tomohito; Shinohara, Yasushi*; Sato, Shunsuke*; Yabana, Kazuhiro; Bertsch, G. F.*
no journal, ,
We calculate the dynamical Franz-Keldysh effect (DFKE), the ultrafast change of the dielectric function by an intense laser field, employing the time-dependent density functional theory. Our result show that the time for the peak of the change of the dielectric function dose not coincide with the peak of the electric field. This difference decreases as the laser intensity increases. To explore this effect analytically, we construct the new time-resolved formula for DFKE. This formula reproduces our numerical results qualitatively.
Otobe, Tomohito; Shinohara, Yasushi*; Sato, Shunsuke*; Yabana, Kazuhiro; Bertsch, G. F.*
no journal, ,
no abstracts in English
Seto, Haruki; Breyiannis, G.*; Yagi, Masatoshi; Dudson, B.*; Xu, X.*
no journal, ,
In this study, we have developed a framework of the first principal simulation of the LH transition by 3field(
, 
, 
)-RMHD model in BOUT++ framework from those by 2field(, )-RMHD model reported by several research groups recently, where is the vorticity, is the pressure and is the parallel vector potential. In these LH transition simulation framework, LH transition is described by the resistive ballooning mode (RBM) turbulence, the pressure profile determined by the dynamic balance of the energy transport and the poloidal damping effect (PDE) describing the radial force balance of the ion species including the poloidal rotation effect. In this presentation, we investigated the impact of the PDE on the RBM turbulence by nonlinear simulations with 3field-RMHD model and found that the PDE suppresses the RBM turbulence as a preliminary step for a first principal simulation of LH transition with 3field RMHD model.