H. HANAKI, T. ASAKA, H. DEWA, T. HORI, T. KOBAYASHI, A. MIZUNO, S. SUZUKI, T. TANIUCHI, H. TOMIZAWA, K. YANAGIDA (SPring-8)
The drift of the RF phase or amplitude had been investigated from 98 to 99, in order to find origins of the fluctuation of the beam current and energy. As a result, tuning of klystron modulators and temperature stabilization were made so as for the RF system to obtain the phase and amplitude stability. Finally, the beam energy fluctuation of 0.1 % (rms) was realized and good reappearance of the injection current was obtained. A beam chicane and an accelelator column were newly installed at the end of the linac to compose an ECS. A photocathode RF gun study succeeded to extract photoelectrons by irradiation of UV laser pulses. A high-power solid-state switch has been developed in order to replace a thyratron for a klystron modulator.
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