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Related Experiment Video

Updated: Jan 12, 2026

High-speed Particle Image Velocimetry Near Surfaces

High-speed Particle Image Velocimetry Near Surfaces

Published on: June 24, 2013

Multimass Three-Dimensional Velocity Map Imaging from Surfaces.

Yifeng Jia¹, Felicia M Green², Kieran Cheung¹

¹The Department of Chemistry, University of Oxford, The Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom.

The Journal of Physical Chemistry Letters

|November 4, 2025

Summary

This summary is machine-generated.

This study introduces a novel multimass ion imaging technique for precise surface scattering analysis. The method accurately measures three-dimensional velocity distributions of ions, advancing surface dynamics research.

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Area of Science:

Surface science
Analytical chemistry
Physical chemistry

Background:

Understanding ion formation dynamics is crucial for surface analysis.
Existing methods may lack the resolution for detailed velocity distribution measurements.

Purpose of the Study:

To present a new multimass ion imaging method for surface scattering studies.
To demonstrate the capability of measuring full three-dimensional velocity distributions of multiple ions.
To investigate the dynamics of secondary ion formation.

Main Methods:

Utilizes a multimass ion imaging technique with the sample on the repeller plate.
Employs velocity mapping of ions along the surface normal.
Uses a fast imaging camera for position and time-of-flight measurements.
Applies the method to secondary ion mass spectrometry (SIMS) experiments with C60+ impact.

Main Results:

Successfully measured the half-Newton spheres and full 3D velocity distributions of multiple ions.
Provides insights into the dynamics of secondary ion formation.
Demonstrates the technique's effectiveness in SIMS experiments.

Conclusions:

The developed 3D velocity map imaging technique is a powerful tool for surface dynamical measurements.
The method is suitable for pulsed ion generation or extraction scenarios.
Advances the understanding of ion-surface interactions and secondary ion formation processes.