Direct observation of spatio-temporal dynamics of short electron bunches in storage rings

Abstract

In recent synchrotron radiation facilities, the use of short (picosecond) electron bunches is a powerful method for producing giant pulses of Terahertz Coherent Synchrotron Radiation (THz CSR). Here we report on the first direct observation of these pulse shapes with a few picoseconds resolution, and of their dynamics over a long time. We thus confirm in a very direct way the theories predicting an interplay between two physical processes. Below a critical bunch charge, we observe a train of identical THz pulses (a broadband Terahertz comb) stemming from the shortness of the electron bunches. Above this threshold, a large part of the emission is dominated by drifting structures, which appear through spontaneous self-organization. These challenging single-shot THz recordings are made possible by using a recently developed photonic time stretch detector with a high sensitivity. The experiment has been realized at the SOLEIL storage ring.

References in corpus (5)

• Observing microscopic structures of a relativistic object using a time -stretch strategy
• High density THz frequency comb produced by coherent synchrotron radiation
• High sensitivity photonic time-stretch electro-optic sampling of terahertz pulses
• Fast Mapping of Terahertz Bursting Thresholds and Characteristics at Synchrotron Light Sources
• Observation of Wakefields and Resonances in Coherent Synchrotron Radiation

Cited by in corpus (10)

• Phase Diversity Electro-optic Sampling: A new approach to single-shot terahertz waveform recording
• Single-pulse time-resolved terahertz spectroscopy of sub-millisecond time dynamics
• Coherent Terahertz synchrotron radiation mastered by controlling the irregular dynamics of relativistic electron bunches
• Continuous bunch-by-bunch spectroscopic investigation of the micro-bunching instability
• From self-organization in relativistic electron bunches to coherent synchrotron light: observation using a photonic time-stretch digitizer
• Terahertz scale microbunching instability driven by nonevaporable getter coating resistive-wall impedance
• 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
• On a Vlasov-Fokker-Planck equation for stored electron beams
• Cost-effective time-stretch terahertz recorders using 1550 nm probes