The RF Power Source for the High Beta Elliptical Cavities of the ESS Linac

1. Surplus water Klystron Modulator load Surplus water Surplus water Klystron Circulator LLRF Cavity Power to Beam RF Source Scheme 1.0 28 Spokes 64 Low β 120 High β 2 28 28 112 36 8 DTL 112 Spoke Low β 0.8 Low β High β High β Cavity Power (MW) 0.6 44 High power 352 MHz Low power 352 MHz Low power 704 MHz Medium power 704 MHz High power 704 MHz 1 1 0.4 RFQ DTL 28 28 0.2 Calculation by M. Eshraqi, WEPS062 0.0 IOT / Solid state Modulator Klystron 0 50 100 150 200 250 300 350 Position (m) Modulator Parameters High Power 704 MHz Klystron Parameters High Power 704 MHz The RF Power Source for the High Beta Elliptical Cavities of the ESS Linac Sustainable Science Reliable Renewable, Responsible, Recyclable RF Source K. Rathsman, H. Danared, R. Zeng, ESS, Lund, Sweden R.J.M.Y. Ruber, Uppsala University, Sweden; C.A. Martins, Laval University, Canada C. Lingwood, Lancaster University, UK; A.J. Johansson, Lund University, Sweden 30% Linac Parameters