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A study of the optical effect of plasma sheath in a negative ion source using IBSIMU code
Anand George1, Taneli Kalvas2, Stephane Melanson3
1Department of Physics, University of Auckland, Private Bag 92019 Auckland, New Zealand.
The Review of Scientific Instruments
|February 5, 2020
Summary
The plasma sheath in ion sources shapes ion beams. Simulations using IBSimu code match experimental data on beam emittance, optimizing ion beam formation.
Area of Science:
- Plasma physics
- Ion beam generation
- Particle accelerators
Background:
- The plasma sheath in ion sources critically influences ion beam properties.
- Beam emittance variations reflect plasma sheath characteristics, with optimal shapes yielding minimum emittance.
Purpose of the Study:
- To model a filament-powered volume-cusp negative ion source using IBSimu.
- To compare simulated beam emittance trends with experimental data.
Main Methods:
- Utilized the IBSimu particle tracking code for plasma simulations.
- Developed a model of D-Pace's TRIUMF licensed volume-cusp negative ion source.
- Analyzed beam emittance trends through simulation and experimental comparison.
Main Results:
- Simulations successfully modeled the ion source.
- Observed agreement between simulated and experimental beam emittance trends.
- Identified correlations between plasma sheath properties and beam emittance.
Conclusions:
- IBSimu simulations provide a viable method for understanding plasma sheath physics.
- The study validates the simulation model for predicting ion beam behavior.
- Optimizing plasma sheath shape is key to achieving minimal beam emittance.
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