Title :
The LEP II RF power generation system
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
By means of the LEP II RF system the maximum circumferential accelerating voltage will be increased from 350 MV at present to about 2000 MV, required for W± pair production at centre-of-mass energies around 180 GeV. The accelerating voltage will be provided by the existing copper RF cavity system (LEP Phase I) and 192 superconducting RF cavities to be installed in LEP by 1995. These sc cavities will be powered by 12 high power klystrons via junction circulators and a WR 2300 waveguide power distribution system. Compared to the existing LEP I installation the output power of the LEP II klystrons has been increased from 1000 to 1300 KW cw by making use of the full capacity of the HV power converters, rated at 100 kV and 40 A. Simultaneously, the power-handling capability of the junction circulators, when operated into a sliding short, could also be enhanced by the same amount. A description of the LEP II RF power generation system is given and, in particular, the improved performance of the high power klystrons, circulators, thyratron crowbars and hard tube modulators is discussed
Keywords :
circulators (microwave); electron accelerators; klystrons; power supplies to apparatus; storage rings; synchrotrons; thyratrons; 100 kV; 1300 kW; 40 A; HV power converter; LEP II; RF power system; WR 2300 waveguide power distribution system; circulators; hard tube modulators; junction circulators; klystrons; superconducting RF cavities; thyratron crowbars; Acceleration; Circulators; Copper; Josephson junctions; Klystrons; Power generation; Production systems; Radio frequency; Voltage; Waveguide junctions;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.308629
