Zobrazeno 1 - 10
of 159
pro vyhledávání: '"Zenitani, Seiji"'
Autor:
Zenitani, Seiji
Publikováno v:
Economics Bulletin, 44, 1113 (2024)
Algorithms for generating random numbers that follow a gamma distribution with shape parameter less than unity are proposed. Acceptance-rejection algorithms are developed, based on the generalized exponential distribution. The squeeze technique is ap
Externí odkaz:
http://arxiv.org/abs/2411.01415
Autor:
Zenitani, Seiji
Publikováno v:
Physics of Plasmas, 31, 094501 (2024)
Modifications to Swisdak [Phys. Plasmas 20, 062110 (2013)]'s rejection sampling algorithm for drawing a Maxwell-J\"{u}ttner distribution in particle simulations are presented. Handy approximations for $e$-folding points and a linear slope in the enve
Externí odkaz:
http://arxiv.org/abs/2408.09105
Magnetic reconnection occurs ubiquitously in the universe and is often invoked to explain fast energy release and particle acceleration in high-energy astrophysics. The study of relativistic magnetic reconnection in the magnetically dominated regime
Externí odkaz:
http://arxiv.org/abs/2309.13382
Autor:
Totorica, Samuel R., Zenitani, Seiji, Matsukiyo, Shuichi, Machida, Mami, Sekiguchi, Kazuhiro, Bhattacharjee, Amitava
Publikováno v:
The Astrophysical Journal Letters, Volume 952, Number 1 (2023)
Magnetic reconnection is an important source of energetic particles in systems ranging from astrophysics to the laboratory. The large separation of spatiotemporal scales involved makes it critical to determine the minimum physical model containing th
Externí odkaz:
http://arxiv.org/abs/2309.08314
Autor:
Zenitani, Seiji, Nakano, Shin'ya
Numerical procedures to generate random variates that follow loss-cone velocity distributions in particle simulations are presented. We propose a simple summation algorithm for the Ashour-Abdalla--Kennel-type loss-cone distribution, also known as the
Externí odkaz:
http://arxiv.org/abs/2309.06879
Autor:
Zenitani, Seiji, Nakano, Shin'ya
Publikováno v:
Physics of Plasmas, 29, 113904 (2022)
A procedure for loading particle velocities from a relativistic kappa distribution in particle-in-cell (PIC) and Monte Carlo simulations is presented. It is based on the rejection method and the beta prime distribution. The rejection part extends ear
Externí odkaz:
http://arxiv.org/abs/2210.15118
Autor:
Kato, Tsunehiko N., Zenitani, Seiji
We construct a particle integrator for nonrelativistic particles by means of the splitting method based on the exact flow of the equation of motion of particles in the presence of constant electric and magnetic field. This integrator is volume-preser
Externí odkaz:
http://arxiv.org/abs/2108.02426
Autor:
Zenitani, Seiji, Miyoshi, Takahiro
Publikováno v:
Astrophysical Journal Letters, 894, L7 (2020)
Properties of plasmoid-dominated turbulent reconnection in a low-$\beta$ background plasma are investigated by resistive magnetohydrodynamic (MHD) simulations. In the $\beta_{\rm in} < 1$ regime, where $\beta_{\rm in}$ is plasma $\beta$ in the inflow
Externí odkaz:
http://arxiv.org/abs/2004.11247
Autor:
Zenitani, Seiji, Kato, Tsunehiko N
We construct Boris-type schemes for integrating the motion of charged particles in particle-in-cell (PIC) simulation. The new solvers virtually combine the 2-step Boris procedure arbitrary n times in the Lorentz-force part, and therefore we call them
Externí odkaz:
http://arxiv.org/abs/1905.12112
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