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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.
Classification: 19.3.

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.

Solution method:
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).

Restrictions:
The code presented is limited to one dimension, and the sole field is the self consistent electrostatic field. An external field can be added.

Running time:
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.