Carbon Nanotube Based Anode for High Power Microwave Systems
Final rept. Jul 2003-Jun 2004
NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF PHYSICS AND ASTRONOMY
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High power microwave tubes are used for both civilian and military applications. Due to the power requirement, tremendous amounts of electrons up to 100Acm2 are extracted from the cathodes and bombard on the anodes with very high kinetic energy. Overheating, out-gassing, and formation of secondary electrons of the anode cause serious problems. Preliminary results at the AFRL suggest that carbon coating can reduce SE. We investigated the effect of carbon nanotube CNT coating on the anode surface. Initial experiments show that CNT is more efficient in absorbing SE compared to the reference metal at low energy. Further experiments are required to study and understand the effect at high energy.
- Atomic and Molecular Physics and Spectroscopy
- Electrical and Electronic Equipment