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Precision Control of the Electron Longitudinal Bunch Shape Using an Emittance-Exchange Beam Line.

G Ha1, M H Cho1, W Namkung1

  • 1POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea.

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|March 25, 2017
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Summary
This summary is machine-generated.

Researchers created tunable relativistic electron bunches with controlled shapes using a novel beam line. A simple method was developed to suppress perturbations, improving the quality of the electron bunch shape.

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Area of Science:

  • Accelerator Physics
  • Particle Beam Dynamics

Background:

  • Generating electron bunches with specific longitudinal shapes is crucial for advanced accelerator applications.
  • Existing methods for tailoring electron bunch shapes face limitations due to perturbations during the shaping process.

Purpose of the Study:

  • To experimentally demonstrate the generation of relativistic electron bunches with tunable longitudinal bunch shapes.
  • To develop and validate a method for suppressing perturbations that degrade bunch shape quality.

Main Methods:

  • Utilized a longitudinal bunch-shaping (LBS) beam line comprising a transverse mask and a transverse-to-longitudinal emittance exchange (EEX) beam line.
  • Employed an Argonne Wakefield Accelerator radio-frequency photoinjector to produce electron bunches.
  • Developed a perturbation suppression technique based on the incident slope of the electron bunch.

Main Results:

  • Successfully generated relativistic electron bunches with a variety of controllable longitudinal bunch shapes.
  • Demonstrated significant suppression of perturbations affecting the longitudinal bunch shape quality.
  • Validated the effectiveness of the incident slope-based method for improving bunch shape fidelity.

Conclusions:

  • The developed LBS beam line and EEX process enable tunable longitudinal bunch shaping.
  • The novel perturbation suppression method enhances the quality and controllability of electron bunch shapes.
  • This technique offers a promising advancement for applications requiring precisely shaped electron bunches.