Optimization of scandate high current density cathodes

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,994.00
Award Year:
2007
Program:
STTR
Phase:
Phase I
Contract:
FA9550-07-C-0138
Agency Tracking Number:
F074-030-0266
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
NANOHMICS, INC.
6201 East Oltorf St., Suite 400, Austin, TX, 78741
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
100651798
Principal Investigator:
Keith Jamison
President
(512) 389-9990
kjamison@nanohmics.com
Business Contact:
Keith Jamison
President
(512) 389-9990
kjamison@nanohmics.com
Research Institution:
OHIO UNIV.
Shane L Gilkey
Office of Research
105 Research and Tech Center
Athens, OH, 45701
(470) 593-0378
Nonprofit college or university
Abstract
Evolving commercial and military requirements for high-frequency power amplification are driving the demand for modern vacuum electronics devices. The explosion of wideband RF communications, space-based communication, and geolocation, as well as advanced military radars and directed energy sources, are placing new requirements on the electron-beam current density, beam emittance, module size, lifetime, and efficiency of vacuum electronic devices. Novel techniques for constructing slow-wave structures and advanced electron collectors are addressing the latter requirements, but cathode technology has not kept pace. One of the more promising cathodes are scandates with reports of emission currents over 100 A/cm2. Unfortunately, there is very little understanding of the underlying physics and limited knowledge of the emitting species and re-supply of the scandate material therefore no clear path to optimizing this cathode's operation. In this STTR program, Nanohmics and its University partner Ohio University, proposes to study the surface science of the scandate cathodes and use this information to optimize its emission performance and lifetime. This program will result in development of an optimized commercial scandate cathode.

* information listed above is at the time of submission.

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