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Grid erosion modeling of the next ion thruster optics
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ernhoff, Jerold W. Soulas, George Technical Monitor Boyd, Iain D. |
| Copyright Year | 2003 |
| Description | Results from several different computational studies of the NEXT ion thruster optics are presented. A study of the effect of beam voltage on accelerator grid aperture wall erosion shows a non-monotonic, complex behavior. Comparison to experimental performance data indicates improvements in simulation of the accelerator grid current, as well as very good agreement with other quantities. Also examined is the effect of ion optics choice on the thruster life, showing that TAG optics provide better margin against electron backstreaming than NSTAR optics. The model is used to predict the change in performance with increasing accelerator grid voltage, showing that although the current collected on the accel grid downstream face increases, the erosion rate decreases. A study is presented for varying doubly-ionized Xenon current fraction. The results show that performance data is not extremely sensitive to the current fraction. |
| File Size | 246518 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040000772 |
| Archival Resource Key | ark:/13960/t8tb62n8c |
| Language | English |
| Publisher Date | 2003-09-01 |
| Access Restriction | Open |
| Subject Keyword | Spacecraft Propulsion And Power Service Life Xenon Apertures Ion Propulsion Computerized Simulation Ion Optics Computer Programs Erosion Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
