Projection-type electron spectroscopy collimator analyzer for charged particles and x-ray detections

Area of Science:

• Physics
• Materials Science
• Analytical Chemistry

Background:

• Characterizing charged particle emission requires precise angular and energy analysis.
• Existing methods often lack wide acceptance angles or high resolution.

Purpose of the Study:

• To develop a compact, high-resolution device for analyzing charged particle angular and energy distributions.
• To enable efficient two-dimensional angular distribution measurements of emitted electrons and ions.

Main Methods:

• Utilized an electrostatic lens with an axisymmetric aspherical mesh and electrodes to parallelize electron trajectories.
• Incorporated planar grids or a collimator plate as an energy band-pass filter.
• Employed microchannel plates and a fluorescent screen for direct projection of angular distribution.

Main Results:

• Achieved a wide acceptance cone angle of nearly 1π steradian.
• Demonstrated parallelization of electron trajectories for perpendicular entry into the energy filter.
• Enabled direct projection of angular distribution onto a screen without a pinhole, ensuring high angular resolution.

Conclusions:

• The developed device offers a simple yet significant electron-optical design for wide-range angular distribution analysis.
• The analyzer is well-suited for two-dimensional angular distribution measurements of charged particles emitted from surfaces.
• This compact instrument enhances the capability for detailed surface analysis in various scientific fields.