Boltzmann expansion in a radiofrequency conical helicon thruster operating in xenon and argon | Zendy

Christine Charles | Zendy; R. Boswell | Zendy; Kazunori Takahashi | Zendy

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Boltzmann expansion in a radiofrequency conical helicon thruster operating in xenon and argon

Author(s) -

Christine Charles,

R. Boswell,

Kazunori Takahashi

Publication year - 2013

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4810001

Subject(s) - helicon , argon , xenon , atomic physics , torr , langmuir probe , plasma , boltzmann constant , conical surface , plasma diagnostics , magnetic field , chemistry , materials science , physics , nuclear physics , thermodynamics , composite material , quantum mechanics

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 for argon compared to xenon.

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