期刊
SCIENTIFIC REPORTS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep10330
关键词
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资金
- Agence Nationale de la Recherche (projet Blanc DYNACO) [2010-042301]
- Ministry of Higher Education and Research
- Nord-Pas de Calais Regional Council
- European Regional Development Fund (ERDF) through the Contrat de Projets Etat-Region (CPER) [20072013]
- LABEX CEMPI project [ANR-11-LABX-0007]
- European Research Council under Grant COXINEL [340015]
- European Research Council (ERC) [340015] Funding Source: European Research Council (ERC)
Emission of light by a single electron moving on a curved trajectory (synchrotron radiation) is one of the most well-known fundamental radiation phenomena. However experimental situations are more complex as they involve many electrons, each being exposed to the radiation of its neighbors. This interaction has dramatic consequences, one of the most spectacular being the spontaneous formation of spatial structures inside electrons bunches. This fundamental effect is actively studied as it represents one of the most fundamental limitations in electron accelerators, and at the same time a source of intense terahertz radiation (Coherent Synchrotron Radiation, or CSR). Here we demonstrate the possibility to directly observe the electron bunch microstructures with subpicosecond resolution, in a storage ring accelerator. The principle is to monitor the terahertz pulses emitted by the structures, using a strategy from photonics, time-stretch, consisting in slowing-down the phenomena before recording. This opens the way to unpreceeded possibilities for analyzing and mastering new generation high power coherent synchrotron sources.
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