Guiding of keV ions between two insulating parallel plates

Area of Science:

• Physics
• Materials Science

Background:

• Understanding ion transport is crucial for various applications.
• Insulating materials present unique challenges in charge management during ion beam experiments.

Purpose of the Study:

• To experimentally investigate low-energy singly charged ion transport between parallel insulating plates.
• To quantify charge deposition, decay, and their impact on beam guiding probability.

Main Methods:

• Utilized varying beam intensities (pA to fA) for charge deposition and temporal imaging.
• Employed SIMION software for trajectory simulation and electric field analysis.
• Developed an equivalent electric circuit model to correlate deposited charge with patch voltage.

Main Results:

• Charge deposition and decay processes were found to act independently, both on the surface and through the bulk.
• Temporal imaging revealed beam positions and intensities, including guided and bypass beams.
• Simulations indicated deposited charge is primarily on the inner plate surfaces, transverse to the beam direction.

Conclusions:

• The study provides quantitative data on ion transport and charge dynamics in parallel plate systems.
• Findings suggest surface charge distribution is the dominant factor affecting beam guiding, not bulk distribution.