The properties of plasma fluctuations in a Magneto-Plasma-Dynamic (MPD) thruster and their role on the performance of this kind of devices has been object of an extensive experimental investigation. In particular, the analysis of electrostatic and magnetic fluctuations with and without the application of an external magnetic field has shown the electromagnetic nature of plasma fluctuations. Gross magnetohydrodynamic instabilities are found to develop whenever the current rises beyond a threshold value. These instabilities have features of helical kink modes with prevalent azimuthal m and axial n periodicity m/n = 1/1 and their occurrence can be described by the Kruskal-Shafranov criterion, generally used in screw pinch stability analysis. The growth of these modes is found to be the cause of the large loss of efficiency observed in MPD thrusters when operating at high current. © 2004 by the American Institute of Aeronautics and Astronautics, Inc.
|Publication status||Published - 2004|
|Event||40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit - , United States|
Duration: 1 Jan 2004 → …
|Conference||40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit|
|Period||1/1/04 → …|
All Science Journal Classification (ASJC) codes
- Aerospace Engineering
- Control and Systems Engineering
- Electrical and Electronic Engineering
Zuin, M., Antoni, V., Bagatin, M., Cavazzana, R., Martines, E., Serianni, G., ... Rossetti, P. (2004). Kink instabilities in a magneto-plasma-dynamic thruster with and without external magnetic field. Paper presented at 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, United States.