What type of study is this?

This is a Experimental Study study.

September 26, 2025Open Access

Coherent Terahertz Smith-Purcell radiation from laser-wakefield-accelerated electron bunches

Key Points

Coherent 30-THz smith-purcell radiation was achieved using 3-micrometer-long electron bunches.
The radiation pulses generated contain around 10 μJ energy, enabling non-invasive diagnostics.
The method involved passing electron bunches just below a grating without causing damage or disturbance.
Such advancements can enhance THz/infrared/electron pulse techniques in ultrafast spectroscopy applications.

Abstract

Smith-Purcell radiation from undulating currents that charged-particle bunches induce when passing over a grating becomes coherent when the grating period exceeds the bunch length. However, millimeter-long bunches from radio-frequency accelerators restrict such coherence to mm-wave and low-THz frequencies. Here, we generate coherent 30-THz Smith-Purcell radiation pulses with ~10 μJ energy by passing 3-micrometer-long electron (e) bunches from a laser-wakefield accelerator

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Cite This Study

Downer et al. (Wed,) studied this question.

synapsesocial.com/papers/68d6c68eb1249cec298b3072 https://doi.org/https://doi.org/10.1364/opticaopen.30194629

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