Observing microscopic structures of a relativistic object using a time-stretch strategy

• DOI: 10.1038/srep10330
• Publication Date: 2015-05-28T13:29:50Z
• Authors: E. Roussel; C. Evain; M. Le Parquier; C. Szwaj; S. Bielawski; L. Manceron; J.-B. Brubach; M.-A. Tordeux; J.-P. Ricaud; L. Cassinari; M. Labat; M.-E Couprie; P. Roy
• Keywords: Bunches; Temporal resolution

Abstract Emission of light by a single electron moving on curved trajectory (synchrotron radiation) is one the most well-known fundamental radiation phenomena. However experimental situations are more complex as they involve many electrons, each being exposed to its neighbors. This interaction has dramatic consequences, spectacular spontaneous formation spatial structures inside electrons bunches. effect actively studied it represents limitations in accelerators and at same time source intense terahertz (Coherent Synchrotron Radiation, or CSR). Here we demonstrate possibility directly observe bunch microstructures with subpicosecond resolution, storage ring accelerator. The principle monitor pulses emitted structures, using strategy from photonics, time-stretch, consisting slowing-down phenomena before recording. opens way unpreceeded possibilities for analyzing mastering new generation high power coherent synchrotron sources.