Spatial retarding field energy analyzer measurements downstream of a helicon double layer plasma | Zendy

Wesley Cox | Zendy; Christine Charles | Zendy; Rod Boswell | Zendy; Rhys Hawkins | Zendy

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Spatial retarding field energy analyzer measurements downstream of a helicon double layer plasma

Author(s) -

Wesley Cox,

Christine Charles,

Rod Boswell,

Rhys Hawkins

Publication year - 2008

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 - 10.1063/1.2965866

Subject(s) - helicon , atomic physics , plasma , beam (structure) , ion , argon , ion beam , spectrum analyzer , magnetic field , momentum (technical analysis) , double layer (biology) , materials science , chemistry , optics , physics , layer (electronics) , nuclear physics , organic chemistry , finance , quantum mechanics , economics , composite material

Spatial ion energy measurements using a retarding field energy analyzer are performed in the exhaust of a 0.30mTorr, 250W helicon double layer plasma to investigate the divergence of the argon ion beam formed by acceleration in the double layer. Various divergence angles are computed by considering the radial distribution of beam density; the average beam ion diverging by 9°. The efficiency at which momentum is imparted parallel to the longitudinal axis of the thruster is calculated to be 98%. The results show that a few centimeters downstream of the source, the beam ions do not follow the magnetic field lines.

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