RF Gun with High-Current-Density Field Emission Cathode

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$100,000.00
Award Year:
2004
Program:
STTR
Phase:
Phase I
Contract:
DE-FG02-04ER86193
Award Id:
67051
Agency Tracking Number:
75748T04-I
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
199 Whitney Avenue, New Haven, CT, 06511
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Jay Hirshfield
Dr.
(203) 548-1144
jay@omega-p.com
Business Contact:
George Trahan
Dr.
(203) 548-1144
trahan@omega-p.com
Research Institution:
Florida International University
J. Torres
11200 SW 8th St
MARC 430
Miami, FL, 33199

Nonprofit college or university
Abstract
75748-Cathodes have a dominant influence on the quality of the electron beams produced from laser photo-cathodes in radio frequency (rf) guns used as injectors in many electron accelerators. Similar limitations are also suffered by thermionic cathodes in diode guns used in high-power rf amplifiers for accelerator applications. These limitations could be surmounted by a field-emission cold cathode capable of high current density. This project will combine the high-current-density field emission from an array of carbon nanotubes with secondary electron channel multiplication in a ceramic facing structure, to produce a cold cathode of exceptional promise for rf guns and diode guns. The cathode will be installed and tested in an existing S-band 2-1/2 cell rf gun. With emission control and modulation, and with current density in the range of 1 kA/cm2, this cathode could provide performance and long-life not enjoyed by other currently-available cathodes. In Phase I, electrodynamic and space-charge flow simulations will be conducted to specify the cathode configuration as well as the range of emission current density from the field-emission cold cathode. Design and preliminary tests will be conducted prior to the fabrication of the gun during Phase II. Commercial Applications and Other Benefits as described by the awardee: Replacing thermionic cathodes and laser photocathodes in rf guns and diode guns by a cold cathode with high-current-density and long lifetime could improve device performance and lower costs. Applications in a range of commercial and military vacuum electronics devices could be anticipated.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government