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The RF source of the 60-MeV Linac for the KEK/JAERI Joint Project

S. Fukuda·A. Anami·C. Kubota·M. Kawamura·S. Yamaguchi·M. Ono·H. Nakanishi·S. Miyake·M. Sakamoto
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Abstract

The construction of the 60-MeV proton linac has started as a low-energy front of the KEK/JAERI Joint Project for a high-intensity proton accelerator facility at KEK. The accelerating frequency is 324 MHz. Five UHF klystrons are used as an rf source; their ratings have a maximum power of 3 MW, a beam pulse width of a 700 micro-sec (an rf pulse width is 650 micro-sec) and a repetition rate of 50 pps. We have manufactured a proto-type rf source (a power-supply system with a modulating-anode pulse modulator and prototype klystrons). In this paper, the specifications and developments of the rf source, including the WR-2300 waveguide system, are summarized. During the manufacturing process, strong oscillations due to back-going electrons from the collector were observed. This phenomenon was analyzed both experimentally and theoretically. We have tested up to an output power of nearly 3 MW, and succeeded to test the DTL hot-model structure.

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S. Fukuda, A. Anami, C. Kubota, M. Kawamura, S. Yamaguchi, M. Ono, H. Nakanishi, S. Miyake, M. Sakamoto. 2000-08-17. The RF source of the 60-MeV Linac for the KEK/JAERI Joint Project. https://arxiv.org/abs/physics/0008040

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