Electron Cloud Effects in the J-parc Rings and Related Topics
نویسنده
چکیده
Electron build-up and collective beam instabilities in the J-PARC rings has been expected by simulation. Bunched beam parameters are close to instability threshold. Coasting beam is stable at the nominal parameter. One of implications is that J-PARC is not in saturation regime, which suggests that keeping the source of electrons, i.e. beam losses, less than a critical value is effective to reduce the electron cloud density. Controlled beam losses are reviewed and confirm the losses are less than the limit. At the KEK PS electron clouds in bunched and coasting beams are observed with the electronsweeping detector developed at LANL. The results are consistent with the behavior previously reported from LANL.
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