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Spatial Separation of Molecular Conformers and Clusters
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Characterization of a new electrostatic storage ring for photofragmentation experiments.

H B Pedersen1, A Svendsen1, L S Harbo1

  • 1Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark.

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Summary

We present SAPHIRA, a new electrostatic storage ring for photon-ion reaction analysis. Initial experiments with a Cu(-) ion beam demonstrate its capability for studying ion beam decay and spatial distributions.

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Area of Science:

  • Atomic and Molecular Physics
  • Accelerator Physics
  • Chemical Physics

Background:

  • Advanced experimental facilities are crucial for studying fundamental ion-atom and ion-molecule interactions.
  • Electrostatic storage rings offer unique capabilities for precise control and analysis of ion beams.

Purpose of the Study:

  • To introduce the newly constructed Storage Ring in Aarhus for PHoton-Ion Reaction Analysis (SAPHIRA).
  • To present the results of the first commissioning experiments with SAPHIRA.
  • To characterize the performance of the storage ring for ion beam storage and analysis.

Main Methods:

  • Commissioning experiments using an intense beam of Cu(-) ions at 4 keV.
  • Characterization of stored ion beam decay rate.
  • Measurement of longitudinal bunch spreading.
  • Direct measurement of transverse spatial distributions under various storage conditions.
  • Systematic investigation of ion storage stability within SAPHIRA's electrical configuration space.

Main Results:

  • Demonstration of stable ion beam storage in SAPHIRA.
  • Quantification of ion beam decay rates and longitudinal spreading.
  • Detailed analysis of transverse spatial beam profiles.
  • Identification of optimal electrical configurations for ion storage.

Conclusions:

  • SAPHIRA is a successfully commissioned electrostatic storage ring capable of precise ion beam manipulation.
  • The initial experiments validate the design and performance of SAPHIRA for future photon-ion reaction studies.
  • The systematic investigation provides valuable data for optimizing storage ring operation and understanding ion beam dynamics.