期刊
JOURNAL OF INSTRUMENTATION
卷 17, 期 12, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1748-0221/17/12/P12013
关键词
Accelerator modelling and simulations (multi-particle dynamics, single-particle dynamics); Beam dynamics; Beam-line instrumentation (beam position and profile monitors, beam-intensity monitors, bunch length monitors); Instrumentation for particle accelerators and storage rings-high energy (linear accelerators synchrotrons)
This paper presents a method of crossing a horizontal nonlinear resonance to split a beam into multiple beamlets for multi-turn extraction from a circular particle accelerator. Through the use of diamond detectors, the horizontal beam emittance of the split beam was successfully measured for the first time in a regime of highly nonlinear beam dynamics. This result is crucial for evaluating the performance of the splitting process and designing further improvements.
Crossing a horizontal nonlinear resonance is the approach that can be used to split a beam in several beamlets with the goal to perform multi-turn extraction from a circular particle accelerator. Such an approach has been successfully implemented in the CERN Proton Synchrotron and is used routinely for the production of high-intensity proton beams for fixed-target physics at the Super Proton Synchrotron. Recently, thanks to the deployment of diamond detectors, originally installed to monitor the beam losses at extraction, it has been possible to measure the horizontal beam emittance of the split beam just prior to extraction. This is the first time that an emittance measurement is attempted for split beams, i.e. in a regime of highly nonlinear beam dynamics. In this paper, the technique is presented and its application to the analysis of the experimental data is presented and discussed in detail. This result is essential for the performance assessment of the splitting process and for the design of further performance improvements.
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