Resonant multi-turn extraction: Principle and experiments

Recently, a novel approach to perform multi-turn extraction was proposed based on beam splitting in the transverse phase space by means of trapping inside stable islands. In addition to numerical simulations, aimed at assessing the feasibility of the proposed technique, an experimental campaign was launched since the year 2002 at the CERN Proton Synchrotron. During the year 2004 run, a high-intensity single-bunch beam was successfully split and the generated beamlets separated without any measurable losses. The underlying principle will be presented and discussed in details in this paper, as well as the latest experimental results and future applications.