Programs in Physics & Physical Chemistry
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|Manuscript Title: Integration of Vlasov equation by a fast Fourier Eulerian code.|
|Authors: B. Izrar, A. Ghizzo, P. Bertrand, E. Fijalkow, M.R. Feix|
|Program title: VLFF|
|Catalogue identifier: ABHD_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 52(1989)375|
|Programming language: Fortran.|
|Computer: SIEMENS VP 200.|
|Operating system: MVS, CRAY OS.|
|RAM: 2860K words|
|Word size: 64|
|Peripherals: graph plotter.|
|Keywords: Vlasov-poisson system, Plasma physics, Two stream instability, Bgk equilibrium, Collisionless plasma.|
Nature of problem:
We look for a solution of the one dimensional Vlasov-Poisson system for a non collisional spatially periodic plasma, starting from an initial condition, here a two stream distribution function or an n holes BGK equilibrium, slightly perturbed.
The evolution of Vlasov Poisson System is numerically solved by replacing the continuous self consistent electric field E(x,t) by a Dirac comb. The program outputs are the distribution function, the density, the electric field and its Fourier components and energies (electrical, kinetic and total).
The code presented is limited to one dimension, and the sole field is the self consistent electrostatic field. An external field can be added.
The last run on the VP 200 need 7.01 sec for 120 time steps and 256 * 156 grid points with a physical meaning (the total number of points is 256*256, so that the execution time is 1.6 micro sec per grid point per time step.
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