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

Abstract

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.

7 pages, 6 figures

References in corpus (2)

• Sub-terahertz, microwaves and high energy emissions during the December 6, 2006 flare, at 18:40 UT
• The contribution of microbunching instability to solar flare emission in the GHz to THz range of frequencies

Cited by in corpus (12)

• Phase Diversity Electro-optic Sampling: A new approach to single-shot terahertz waveform recording
• Direct observation of spatio-temporal dynamics of short electron bunches in storage rings
• Single-pulse time-resolved terahertz spectroscopy of sub-millisecond time dynamics
• High sensitivity photonic time-stretch electro-optic sampling of terahertz pulses
• Coherent Terahertz synchrotron radiation mastered by controlling the irregular dynamics of relativistic electron bunches
• From self-organization in relativistic electron bunches to coherent synchrotron light: observation using a photonic time-stretch digitizer
• Performance analysis of table-top single-pulse terahertz detection up to 1.1 MHz
• High throughput data streaming of individual longitudinal electron bunch profiles in a storage ring with single-shot electro-optical sampling
• Measurement of radio-frequency temporal phase modulation using spectral interferometry
• Cost-effective time-stretch terahertz recorders using 1550 nm probes
• Foveated Time Stretch
• The Temporal Gearbox