STATUS OF THE EXPLORATION OF AN ALTERNATIVE CLIC FIRST ENERGY STAGE BASED ON KLYSTRONS

The Compact Linear Collider is based on a two-beam scheme to accelerate the main, colliding beams. This scheme allows very high centre-of-mass energies to be reached. At low collision energies the main beams could be accelerated by powering the X-band accelerating structures with klystrons instead of the two-beam scheme. We explore this option and indicate the parameters such a machine might have and present the outline of a design.