Internal plasma potential profiles in a laboratory-model Hall thruster
| Autor: | James M. Haas, Alec D. Gallimore |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | Physics of Plasmas. 8:652-660 |
| ISSN: | 1089-7674 1070-664X |
| Popis: | The Plasmadynamics and Electric Propulsion Laboratory High-speed Axial Reciprocating Probe system is used in conjunction with a floating emissive probe to measure plasma potential in the discharge chamber of the P5 Hall thruster. Plasma potential measurements are made at a constant voltage, 300 V, at two different discharge current conditions: 5.4 and 10 A. The plasma potential contours for the 5.4 A case indicate that the acceleration region begins several millimeters upstream of the exit plane, extends several centimeters downstream, and is uniform across the width of the discharge chamber. The 10 A case is similar to the 5.4 A case with the exception that the acceleration region is shifted downstream on centerline. Axial electric field profiles, computed from the measured potential, show a double peak structure in the 5.4 A case, indicating a zone of ion deceleration. Perturbations to the discharge current are shown to correspond spatially with the location of the peak electric field indicating that th... |
| Databáze: | OpenAIRE |
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