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ISSN - 0217751X, International Journal of Modern Physics A, 2000, vol. 15, p. 2577-2586

Photon colliders: Key problems, new ideas

Telnov Valery

High energy photon colliders based on laser backscattering are a very natural extension of a e+e- linear colliders and open new possibilities to study of the matter. This option has been included in the pre-conceptual designs of linear colliders and work on Technical Design Reports is in progress. The physics motivation for photon colliders is quite clear though more studies are needed. The proof of its technical feasibility and the search for the best solutions is of first priority now. In this talk we discuss: Physics motivation, laser problems and new possible solutions, and generation of low emittance beams needed for obtaining very high luminosities.