Drive Beam Generation For CLIC Based On 200 MHz SC Structures

The present note describes an RF power generation scheme for multibunch operation at 1 TeV CM and luminosity 10^34 cm^-2s^-1. - The scheme is upgraded to use acceleration with 200 MHz SC cavities (instead of 352 or 250 MHz ones, but still with 6MV/m) in order to reduce the active SC linac length, for the required stored electromagnetic energy (180 KJ/linac), and hence also reduce the capital cost of drive beam generation. Further value (7.8 10^9), due to the lowered frequency, increases the overall efficiency.