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Validated simulation of the ion extraction grid lifetime.

M Tartz¹, E Hartmann, H Neumann

¹Leibniz Institute of Surface Modification, Permoserstrasse 15, Leipzig, Germany. michael.tartz@iom-leipzig.de

The Review of Scientific Instruments

|March 5, 2008

Summary

This study validates extraction grid erosion modeling for ion thrusters. The validated model accurately predicts thruster lifetime, boosting confidence for space missions.

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Area of Science:

Space Propulsion and Electric Propulsion Systems
Materials Science and Engineering
Computational Fluid Dynamics and Plasma Physics

Background:

Gridded ion thrusters are critical for deep space missions.
Understanding and predicting extraction grid erosion is vital for mission longevity.
Existing erosion models require experimental validation.

Purpose of the Study:

To validate a computational model for extraction grid erosion in gridded ion thrusters.
To assess the model's accuracy using experimental data from life tests.
To enhance the reliability of lifetime predictions for ion thruster technology.

Main Methods:

Development and application of an extraction grid erosion model.
Utilizing experimental data from three life tests of gridded ion thrusters.

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Comparison of simulated erosion data with experimental results across various thruster sizes and operating conditions.

Main Results:

Achieved excellent agreement between simulated and experimental data for all tested cases.
Demonstrated the model's capability to accurately predict erosion patterns.
Validated the predictive power of the erosion modeling code.

Conclusions:

The validated erosion model provides high confidence in lifetime predictions for ion thrusters.
This work supports the use of advanced modeling for space mission design and thruster development.
The findings are crucial for ensuring the success of long-duration space missions relying on ion propulsion.