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Simulation and beamline experiments for the superconducting electron cyclotron resonance ion source VENUS
Damon S Todd1, Daniela Leitner, Claude M Lyneis
1Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
The Review of Scientific Instruments
|March 5, 2008
Summary
The particle-in-cell code WARP now simulates ion beam extraction from plasma sources. This enhanced code uses experimental sputtering data for initial ion distributions, improving simulation accuracy for systems like the VENUS electron cyclotron resonance ion source.
Area of Science:
- Plasma Physics
- Beam Physics
- Computational Physics
Background:
- Particle-in-cell codes are essential for simulating charged particle beams.
- Accurate initial conditions are crucial for reliable plasma extraction simulations.
- Electron cyclotron resonance (ECR) ion sources are widely used for generating ion beams.
Purpose of the Study:
- To enhance the WARP particle-in-cell code with 2D and 3D sheath extraction models.
- To develop a method for initializing ion distributions based on experimental sputtering data for ECR ion sources.
- To validate simulation results against experimental data for oxygen beams from the VENUS ECR ion source.
Main Methods:
- Incorporated two- and three-dimensional sheath extraction models into the WARP code.
- Developed an initialization method using experimentally measured sputtering on the source biased disk.
- Performed extraction and transport simulations of an oxygen beam.
- Compared simulation results with experimental beam imaging on a quartz viewing plate.
Main Results:
- The enhanced WARP code can now simulate entire ion beam transport systems, including plasma extraction.
- The new initialization method provides a more realistic starting point for plasma extraction simulations.
- Preliminary simulation results for oxygen beam extraction show good agreement with experimental observations.
Conclusions:
- The enhanced WARP code with sheath extraction models is a valuable tool for simulating ion beam transport systems.
- The sputtering-based initialization method improves the accuracy of plasma extraction simulations.
- The study demonstrates the capability of the enhanced WARP code to reproduce experimental results from superconducting ECR ion sources like VENUS.
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