Abstract

The beam energy in LEP Phase I at maximum luminosity is 55 GeV. With a circulating current of 3 mA per beam, an effective cavity shunt impedance of 40 M..cap omega../m and RF power losses in the waveguide system of 7.5%, a total of 14.9 MW RF generator power is required for achieving this energy, the respective values for injection being 20 GeV and about 0.26 MW. This RF power is generated by 16 klystrons and supplied to the 128 accelerating structures via a WR 2300 waveguide system. Two klystrons, together with 16 accelerating structures, the controls and associated waveguide system, form an RF unit.

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