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Manuscript Title: circe version 1.02: beam spectra for simulating linear collider physics.
Authors: T. Ohl
Program title: circe Version 1.02
Catalogue identifier: ADFI_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 101(1997)269
Programming language: Fortran.
Keywords: Particle physics, Elementary, Particle beam, Event generation, Beamstrahlung, Linear colliders.
Classification: 11.10.

Nature of problem:
Provide simple and reproducible, yet realistic, parameterizations of the e+- and gamma-beam spectra for linear colliders. The intricate beam dynamics in the interaction region of a high luminosity linear collider at sqrt(s)=500GeV result in non-trivial energy spectra of the scattering electrons, positrons and photons. Physics simulations require simple and reproducible, yet realistic, parameterizations of these spectra.

Solution method:
Parameterization, curve fitting, Monte Carlo event generation.

Running time:
A small fraction (typically a few percent) of the running time of applications calling the library.