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Seeding, controlling, and benefiting from the microbunching instability.

S Seletskiy¹, B Podobedov, Y Shen

¹National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973, USA. seletskiy@bnl.gov

Physical Review Letters

|August 6, 2013

Summary

This summary is machine-generated.

Researchers measured microbunching instability in electron beams, benchmarking analytical models. This study demonstrates a longitudinal space charge amplifier (LSCA) for advanced light sources.

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Area of Science:

Physics
Accelerator Physics
Beam Dynamics

Background:

Advanced light sources rely on coherent emission from high-density electron beams.
Microbunching instabilities in these beams, arising from space charge and wakefields, are poorly understood and difficult to manage.

Purpose of the Study:

To systematically measure microbunching instability in controlled electron beams.
To benchmark analytical calculations for microbunching instability growth.
To demonstrate a longitudinal space charge amplifier (LSCA) for potential applications.

Main Methods:

Electron beams were premodulated with controlled depths and wavelengths.
Measurements were compared between modulated and unmodulated beams.
Systematic data collection allowed for benchmarking of theoretical models.

Main Results:

The first systematic measurements of microbunching instability were performed.
Analytical calculations for microbunching instability were successfully benchmarked.
A proof of principle for a longitudinal space charge amplifier (LSCA) was demonstrated.

Conclusions:

Understanding and controlling microbunching instability is crucial for advanced light sources.
The demonstrated LSCA offers a method for controlling waveforms and enhancing spectral content.
This work provides a foundation for developing more stable and powerful coherent radiation sources.