Charles, C.; Boswell, R.; Takahashi, K.
A low pressure (~ 0.5 mTorr in xenon and ~ 1 mTorr in argon) Boltzmann expansion is
experimentally observed on axis within a magnetized (60 to 180 G) radiofrequency (13.56 MHz)
conical helicon thruster for input powers up to 900 W using plasma parameters measured with a
Langmuir probe. The axial forces, respectively, resulting from the electron and magnetic field
pressures are directly measured using a thrust balance for constant maximum plasma pressure
and show a higher fuel efficiency...[Show more]
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