VLEPP based photon linear collider 100 × 100 GeV with ultimate luminosity

The possible parameters of a photon linear collider at its ultimate luminosity, based on the VLEPP physics and technology [V.E. Balakin et al., Proc. 6th Nat. Conf. on Accelerators, Dubna, 1978; V.E. Balakin, Proc. 4th Int. Workshop on Next Generation Linear Colliders, Garmisch, 1992], are presented. At a photon energy of 100 × 100 GeV the maximum achievable luminosity is about 1 × 1036 cm−2 s−1. Beam parameters, luminosity characteristics, and ways to reduce the background are considered as well.