Xenon charge exchange cross sections for electrostatic thruster models
| Autor: | J. Scott Miller, Steve Pullins, Yu-Hui Chiu, Rainer A. Dressler, Dale J. Levandier |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 91:984-991 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.1426246 |
| Popis: | Charge exchange between xenon ions and xenon atoms is the source of a detrimental low energy plasma in the vicinity of electrostatic spacecraft thrusters. Proper modeling of charge-exchange induced spacecraft interactions requires knowledge of the respective charge-exchange cross sections. Guided-ion beam measurements and semiclassical calculations are presented for xenon atom charge-exchange collisions with Xe+ and Xe2+ at energies per ion charge ranging from 1 to 300 eV. The present measurements for the symmetric Xe++Xe exchange system are in good agreement with several earlier experimental studies and semiclassical calculations based on the most recently computed Xe2+ interaction potentials. The cross sections are ∼30% higher than predictions by the Rapp and Francis model [D. Rapp and W. E. Francis, J. Chem. Phys. 37, 2631 (1962)]. The present Xe2++Xe symmetric charge exchange measurements are the first to cover the ion energy range from 40 to 600 eV. The cross sections are in good agreement with low-e... |
| Databáze: | OpenAIRE |
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