Optimization of scandate high current density cathodes

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9550-09-C-0085
Agency Tracking Number: F074-030-0266
Amount: $749,943.00
Phase: Phase II
Program: STTR
Awards Year: 2009
Solicitation Year: 2007
Solicitation Topic Code: AF07-T030
Solicitation Number: N/A
Small Business Information
Nanohmics, Inc
6201 East Oltorf St., Suite 400, Austin, TX, 78741
DUNS: 100651798
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Keith Jamison
 (512) 389-9990
Business Contact
 Keith Jamison
Title: President
Phone: (512) 389-9990
Email: kjamison@nanohmics.com
Research Institution
 Ohio University
 Shane L Gilkey
 Research and Sponsored Program
Research and Tech Center 105
Athens, OH, 45701
 (740) 593-2857
 Nonprofit college or university
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 cathodes 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.  Optimized cathodes will be tested in a TWT environment.  This program will result in development of an optimized high current density commercial scandate cathode.   BENEFIT: Development and optimization of a high current density, long lived, rugged cathode opens up applications in many areas.  These include compact electron sources for klystrons, traveling wave tubes, and other RF- and microwave vacuum electronic devices as well as long life electron sources for X-ray tubes.

* information listed above is at the time of submission.

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