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An ion-atom merged beams setup at the Cryogenic Storage Ring.

F Grussie1, A P O'Connor1, M Grieser1

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Summary

This study details a new merged beams experiment for ion-neutral collisions using a cryogenic storage ring. Proof-of-principle measurements demonstrate the system

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Area of Science:

  • Atomic and Molecular Physics
  • Chemical Physics
  • Experimental Nuclear Physics

Background:

  • Ion-neutral collision studies are crucial for understanding chemical processes in various environments.
  • Previous experimental methods faced limitations in controlling collision energies and reactant types.

Purpose of the Study:

  • To present a novel merged beams experiment for studying ion-neutral collisions.
  • To detail the capabilities of the Cryogenic Storage Ring setup for high-precision measurements.
  • To demonstrate proof-of-principle for the experimental approach.

Main Methods:

  • Utilizing a merged beams technique with fast neutral atom beams (10-300 keV) generated by laser photodetachment.
  • Employing a cryogenic storage ring to store molecular ions and facilitate reactions with neutral beams.
  • Implementing dedicated detectors for charged reaction products across various mass ranges.
  • Tuning relative collision energies by adjusting the kinetic energy of the neutral beam.

Main Results:

  • Successful generation of fast neutral atom beams in their ground state.
  • Demonstration of the experimental setup's capability to study ion-neutral reactions.
  • Proof-of-principle measurements for the reaction of neutral Carbon atoms with deuterated molecular ions (D2+).

Conclusions:

  • The described merged beams experiment provides a versatile platform for investigating ion-neutral collision dynamics.
  • The Cryogenic Storage Ring setup offers precise control over collision parameters.
  • This technique opens new avenues for studying fundamental chemical reactions at the atomic and molecular level.