Hall thrusters might better scale to low power with nonconventional geometr
y. A 9 cm cylindrical, ceramic-channel, Hall thruster with a cusp-type magn
etic field distribution has been investigated. It exhibits discharge charac
teristics similar to conventional coaxial Hall thrusters, but does not expo
se as much channel surface. Significantly, its operation is not accompanied
by large amplitude discharge low frequency oscillations. (C) 2001 American
Institute of Physics.