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Back-Gate Field Emission-Based Cathode RF Electron Gun

Award Information

Agency:
Department of Energy
Branch:
N/A
Award ID:
94642
Program Year/Program:
2009 / SBIR
Agency Tracking Number:
90028
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Rivis, Inc.
P.O. Box 13740 Research Triangle Pa, NC 27709-3740
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2009
Title: Back-Gate Field Emission-Based Cathode RF Electron Gun
Agency: DOE
Contract: DE-FG02-09ER85421
Award Amount: $99,914.00
 

Abstract:

High current electron sources are required in numerous applications of interest to the DOE; however, current RF guns based upon thermionic cathodes and photocathodes have serious limitations. While thermionic cathodes have high average electron currents, they suffer from degraded beam quality when used in RF guns; this degradation in beam quality is due to the fact that the electron emission cannot be gated to a particular fraction of the RF period, because of the continuous electron emission. The photocathode is a very high current source, but the laser used to drive it cannot produce a pulse at every RF period; thus, the average power is lower than that for thermionic cathodes. In this project, field emission cathodes, which emit electrons in the presence of high electric fields, will be explored an alternative technology to solve the problems associated with thermionic cathodes and photocathodes. Above the threshold for emission, the current increases rapidly with increasing electric field and will emit electrons at every RF period. Commercial Applications and other Benefits as described by the awardee Field emission cathodes, or so called cold cathodes, consume less power during operation and as a result would be desirable for use in displays for portable devices. They also can be used in various analytical instruments such as mass spectrometers and vacuum gages. The DOD has long sought cold cathodes for high power microwave tubes, the primary long range communication technology for the Navy. For the DOE the electron gun can be used for free electron lasers, abatement of gases from the burning of fossil fuels, compact high precision welding systems, and sources of THz radiation and compact microscopes.

Principal Investigator:

Allen Martin
Dr.
9198810500
amartin@rivisinc.com

Business Contact:

Donald Gentry
Dr.
9198810500
dgentry@rivisinc.com
Small Business Information at Submission:

Rivis, Inc.
8100 Brownleigh Drive Suite 120 Raleigh, NC 27617

EIN/Tax ID: 260111615
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No