Progess in Photon Colliders

Authors : Valery TELNOV

Pages : 541-550

View : 16 | Download : 10

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Last two years were very important in history of a photon colliders. This option is included now in conceptual design reports of the NLC, JLC and TESLA/SBLC projects. All the designs foresee two interaction regions: one for e+e- and the second for gg, g e and e-e- collisions. This paper is focused on three aspects: 1); arguments for photon colliders; 2); parameters of current projects; 3); ultimate luminosities and energies, new ideas. Recent studies have shown that the main collision effect - coherent pair creation - is suppressed at photon colliders with the energy insert ignore into journalissuearticles values(2E < 2 TeV); due to the beam repulsion, and one can achieve, in principle, the gg luminosity exceeding 1035 cm-2s-1. The required electron beams with very small emittances can be obtained, for example, using a laser cooling of electron beams. This new method requires a laser with a power by one order of magnitude higher than that required for the ``conversion`` of electrons to photons. Such lasers are not available today, but hopefully they will appear by the time when linear colliders will be built. High energy gg, g e colliders with the luminosity comparable to that in e+e- collisions are beyond the competition in study of many phenomena of particle physics.
Keywords : Turk J Phys, 22, 1998, 541 550 Turk J Phys, vol 22, iss 7