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Related Experiment Videos

DAΦNE operation with electron-cloud-clearing electrodes.

D Alesini1, A Drago1, A Gallo1

  • 1LNF-INFN, Via E. Fermi 40, 00044 Frascati, Rome, Italy.

Physical Review Letters
|August 29, 2014
PubMed
Summary
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Special electrodes were installed in the DAΦNE collider to mitigate electron cloud (e-cloud) effects. These electrodes effectively suppressed beam instabilities and improved beam quality, marking a significant advancement in particle accelerator performance.

Area of Science:

  • Particle Physics
  • Accelerator Physics
  • Beam Dynamics

Background:

  • Electron cloud (e-cloud) effects significantly limit performance in high-intensity particle storage rings.
  • In the DAΦNE electron-positron collider, e-cloud effects cause horizontal beam instability, limiting positron beam current and deteriorating beam quality.

Purpose of the Study:

  • To investigate the effectiveness of newly designed metallic electrodes for mitigating electron cloud effects in the DAΦNE collider.
  • To present experimental measurements demonstrating the suppression of e-cloud instabilities and their impact on beam dynamics.

Main Methods:

  • Installation of novel long metallic electrodes in dipole and wiggler magnets of the DAΦNE positron ring.
  • Experimental measurements of e-cloud instabilities growth rate, transverse beam size variation, and tune shifts.

Related Experiment Videos

  • Comparative analysis by switching electrodes on and off during machine operation.

    • Main Results:

    • The installed electrodes demonstrated clear effectiveness in suppressing e-cloud effects.
    • Measurements showed a reduction in beam instability growth rates and improvements in beam quality.
    • The study provided unprecedented data on e-cloud phenomena and mitigation strategies.

    Conclusions:

    • The novel electrode design is effective for mitigating electron cloud effects in particle accelerators.
    • This technological advancement allows for higher stored beam currents and improved beam quality in colliders like DAΦNE.
    • The findings represent a significant step forward in managing beam dynamics challenges in high-intensity storage rings.