Abstract

We report on a plasma wake-field accelerator experiment using a high-intensity 250 MeV electron beam of the linac at KEK (National Laboratory for High Energy Physics, Japan). The experiment provedthe plasma wake-fields excited by a train of several bunches accelerate a trailing bunch. We observed an approximately 4 MeV shift of beam energy in a 1 m long plasma with a density of 4 × 10 11 cm −3. We describe the present status and the future plan of experimets based on a new scheme of a plasma wake-field accelerator driven by a train of multiple bunches.

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