An extensive experimental investigation of magnetic and electrostatic fluctuations in a magneto-plasma-dynamic (MPD) thruster, with and without the application of an external magnetic field, has shown that gross magnetohydrodynamic instabilities develop whenever the current rises beyond a threshold value. These instabilities are helical kink modes with azimuthal m and axial n periodicity m/n = 1/1 and their occurrence can be described by the Kruskal-Shafranov stability criterion. The presence of these modes is found to be the cause of the loss of efficiency observed in MPD thrusters at high current. © 2004 American Institute of Physics.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
Zuin, M., Cavazzana, R., Martines, E., Serianni, G., Antoni, V., Bagatin, M., ... Rossetti, P. (2004). Critical regimes and magnetohydrodynamic instabilities in a magneto-plasma-dynamic thruster. Physics of Plasmas, 11(10), 4761 - 4770. https://doi.org/10.1063/1.1786593