Вы находитесь на старом сайте НГУ. Перейти на новый сайт

Comparison of photon colliders based on e-e- and e+e- beams

Telnov V. I.

At photon colliders (γγ,γe) high energy photons are produced by Compton scattering of laser light off the high energy electrons (or positrons) at a linear collider. At first sight, photon colliders based on e+e- or e-e- primary beams have similar properties and therefore for convenience one can use e+e - beams both for e+e- and γγ, γe modes of operation. Below we compare these options and show that e -e- beams are much better (mandatory) because in the e+e- case low energy background γγ → hadrons is much higher and e+e- annihilation reactions present a very serious background for γγ processes.