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Plume Characterization of an Ion Focusing Hall Thruster
| Content Provider | Semantic Scholar |
|---|---|
| Author | Xu, Kunning G. Walker, Mitchell L. R. |
| Copyright Year | 2012 |
| Abstract | The T-220HT is a 10-kW class Hall effect thruster developed as the primary propulsion system for satellites. In-channel electrodes and additional magnetic coils are added to study ion focusing to decrease energy losses from ion-wall neutralization and plume divergence in order to increase the thrust-to-power ratio. In this study, electrically-biased graphite electrode rings are embedded in the discharge channel walls to repel radial ions. The thruster is tested from 125-300 V at 9 A discharge, with the electrodes either floating, biased to 10 V or 30 V. The mass flow rate was varied from 9.8-10.4 mg/s to maintain constant current. Maximum chamber pressure was 1.5e-5 Torr-Xe. Performance measurements on xenon show a maximum increase in thrust-to-power ratio of 4.84 mN/kW, 15.3 mN thrust, 206 s Isp, and 8% anode efficiency. The plume ion current density, ion energy distribution function, and plasma potential is characterized and indicates a collimation of the ion beam and a increase in ion number density without an increase in propellant neutrals, which results in an increase in mass utilization. The different electrode currents and ion energy distribution functions at 10 V compared to 30 V electrodes leads to the idea of different modes of operation with different electrode biases. |
| Starting Page | 1105 |
| Ending Page | 1115 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.2514/1.B34433 |
| Alternate Webpage(s) | http://mwalker.gatech.edu/papers/JPP_Xu_082011.pdf |
| Alternate Webpage(s) | http://mwalker.gatech.edu/papers/JPC_2011_Xu.pdf |
| Alternate Webpage(s) | http://mwalker.gatech.edu/papers/JPP_V28_No5_pp1105_1115.pdf |
| Alternate Webpage(s) | https://doi.org/10.2514/1.B34433 |
| Volume Number | 28 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
