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Microbunching instability suppression via electron-magnetic-phase mixing.

S Di Mitri1, S Spampinati2

  • 1Elettra-Sincrotrone Trieste, 34149, Basovizza (TS), Italy.

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|April 22, 2014
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Summary
This summary is machine-generated.

Researchers demonstrate controlling microbunching instability in electron linacs using magnetic chicanes. This method suppresses instability, crucial for advanced applications like free electron lasers and generating high-brightness electron beams.

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Area of Science:

  • * Particle Physics
  • * Accelerator Physics

Background:

  • * Microbunching instability is a critical issue in high-brightness electron linacs.
  • * It negatively impacts beam diagnostics and coherent radiation generation (e.g., free electron lasers).

Purpose of the Study:

  • * To experimentally demonstrate the control and suppression of microbunching instability.
  • * To investigate the use of particle phase mixing in a magnetic chicane for instability mitigation.

Main Methods:

  • * Implemented a magnetic chicane to induce longitudinal phase mixing of electron beam particles.
  • * Monitored optical transition radiation (OTR) intensity as an indicator of instability gain at optical wavelengths.
  • * Compared experimental results with particle tracking simulations and analytical gain evaluations.

Main Results:

  • * Achieved a one-order-of-magnitude reduction in OTR intensity, indicating significant instability suppression.
  • * The achieved suppression level matched that obtained through beam heating methods.
  • * Experimental findings align with theoretical predictions and simulations.

Conclusions:

  • * Magnetic-phase mixing in a chicane is a viable method for controlling microbunching instability.
  • * This technique is essential for enhancing the performance of electron linacs and related applications.
  • * Explored potential applications in generating quasicold, high-brightness ultrarelativistic electron beams.