Carbon Nanotube Based Electron Field Emission Cathodes for Traveling Wave Tubes

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$98,989.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
FA9451-05-M-0185
Award Id:
72736
Agency Tracking Number:
F051-001-2962
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
P.O. Box 13788, 7020 Kit Creek Road, Suite 280, RTP, NC, 27709
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
017945192
Principal Investigator:
Bo Gao
Senior Scientist
(919) 423-1832
bgao@xintek.com
Business Contact:
Shan Bai
CEO
(919) 313-9638
sbai@xintek.com
Research Institute:
n/a
Abstract
The conventional thermionic cathodes used in traveling wave tubes (TWTs) suffer from many technical limitations including limited current density, poor energy efficiency, difficulty of control, and lack of miniaturization. Xintek, Inc. has developed proprietary technologies for fabrication of high performance field emission cold cathodes based on carbon nanotubes (CNTs). Our CNT cathodes tested at Air Force have shown high emission current density (up to 75 A/cm2), excellent emission stability, and high pulsation rate (>100 KHz). They have great potential to replace the thermionic cathodes and provide enhanced TWT performances. In this Phase I project we will: a) study and refine the performance of our CNT cathodes to generate current densities of 1-10 A/cm2, the typical performance of thermionic cathodes used in TWTs; b) collaborate with the Beverly Microwave Division (BMD) of Communications & Power Industries (CPI) to investigate the performances of our CNT cathodes in practical TWT environments and predict current density of our cathodes in real TWT devices. In phase II we will: a) integrate our CNT cathodes into actual TWTs and optimize the cathode design to enhance their efficiency, reliability and current density; b) prepare a commercialization roadmap to market the technologies.

* information listed above is at the time of submission.

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