Nanosecond optical imaging spectroscopy of an electrothermal radiofrequency plasma thruster plume | Zendy

Christine Charles | Zendy; James Dedrick | Zendy; R. W. Boswell | Zendy; Deborah O’Connell | Zendy; Timo Gans | Zendy

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Nanosecond optical imaging spectroscopy of an electrothermal radiofrequency plasma thruster plume

Author(s) -

Christine Charles,

James Dedrick,

R. W. Boswell,

Deborah O’Connell,

Timo Gans

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 - 10.1063/1.4821738

Subject(s) - nanosecond , plume , plasma , materials science , anode , spectroscopy , plasma diagnostics , argon , optics , radio frequency , torr , propellant , electrode , atomic physics , laser , chemistry , physics , telecommunications , organic chemistry , quantum mechanics , computer science , thermodynamics

Nanosecond optical imaging spectroscopy is employed to investigate the spatio-temporal dynamics of the plasma plume expanding from a 4.2 mm-diameter, 20 mm-long cylindrical capacitively coupled electrothermal radiofrequency (rf) driven thruster using 10 W of power at 12.50 MHz and an argon pressure of 1.5 Torr. On-axis, the plume exhibits four distinct peaks of optical emission intensity within the rf period. The plume has a spherical shape with a transient radial extension (during half of the rf cycle) at the thruster exit plane due to an rf current to ground when the grounded electrode acts as an anode.

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