Performance characteristics of the pulsed high power klystron tube for PLS 2-GeV Linac

PLS 2-GeV Linac employs the E-3712 klystron tubes manufactured by the TOSHIBA as one of the pulsed high power microwave sources. The rated power of the tube is 80-MW at 4 /spl mu/s pulse width with 60 Hz pulse repetition rate. As a part of the main linac we have completed the installation of two units of the E-3712 klystron tubes and the matching 200-MW modulators together with the accompanying waveguide networks and the accelerating columns. Since all the components are exposed as a virgin to high power microwave, careful power conditioning procedures are underway. The rest of linac components installation is also underway. We present the performance characteristics of the E-3712 klystron tube measured with the water load. The result of the initial power conditioning operation for the waveguide network and the accelerating structures installed as a part of the PLS 2-GeV linac is also presented. >