An overview of new initiatives in IEC at the University of Sydney

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Presentation transcript:

An overview of new initiatives in IEC at the University of Sydney Joe Khachan, Matthew Carr, Scott Cornish, David Gummersall, Adam Israel, Colin Tuft

Current projects include: Creation of virtual cathode for IEC Electric propulsion for spacecraft using gridded IEC micro-channels Beam-background fusion for neutron sources

Virtual cathode: The Polywell Null Red is the largest magnitude. Blue is the smallest

Virtual cathode: The Polywell Three dimensional magnetic cusps to trap electron at the center resulting in a deep potential well Graphic form http://www.talk-polywell.org

Virtual cathode: The Polywell Our Polywell arrangement. Langmuir probe Electron beam

Virtual cathode: The Polywell Current through coils Floating potential from probe at the center

Virtual cathode: Electron focus Central spherical grid is now the anode. Chamber is the cathode

Virtual cathode: Electron focus Langmuir probe Anode

Virtual cathode: Electron focus Discharge is contained mostly within the anode during a high voltage pulse

Virtual cathode: Electron focus Virtual cathodes oscillates at the center.

Virtual cathode: Electron focus Oscillations are damped and the well is not as deep as that of the center.

Electric propulsion Micro-Channels consist of collimated energetic neutrals traveling away from the center.

Electric propulsion Plume Charge Exchange Thruster Hollow cathode Anode Plume Glass tube Anode Charge Exchange Thruster

Electric propulsion 0.1 millinewton for 100 Watts of power Thrust measurement

Electric propulsion 0.1 mN for H at 100W 1.0 mN for Xe at 100 W (estimated) Comparable to Hall thrusters. Thrust measurement

Neutron source: Cyclotron Use cyclotron motion to maximum beam-background fusion.

Neutron source: Cyclotron Introduce deuterium into a cyclotron

Neutron source: Cyclotron

Neutron source: Cyclotron Hydrogen Doppler spectrum 10 Å = 1 keV Fusion possible

Summary Polywell capable of extended trapping time for electrons Virtual cathodes produced using a Polywell and electron focus. Polywell capable of extended trapping time for electrons Thrust measurements on a micro-channel indicates spacecraft propulsion is possible A cyclotron based plasma neutron source is possible.