2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/86698Photon collider based on cold and warm linear collider technologies are compared from the point of view of attainable luminosities, technical feasibility of laser systems and experimental conditions.4 pages, Latex, To be published in Proc. of the Intern. Conference of Linear Colliders, Paris, April 19-23, 2004Accelerator PhysicsInstrumentation and DetectorsOpticstext