Linear gridless ion thruster
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United States of America Patent
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Nov 4, 2003
Grant Date -
Dec 26, 2002
app pub date -
Jun 13, 2002
filing date -
Jun 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A linear gridless ion thruster (LGIT) is provided to serve as an ion source for spacecraft propulsion or plasma processing. The LGIT is composed of two stages: (1) an ionization stage composed of a hollow cathode, anode, and cusp magnetic field circuit to ionize the propellant gas; and (2) an acceleration stage composed of a downstream cathode, upstream anode, and a radial magnetic field circuit to accelerate ions created in the ionization stage. The LGIT replaces grids used in conventional ion thrusters (Kaufman guns) to accelerate ions with Hall-current electrons as in the case with conventional Hall thrusters.
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