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RF Gun with High-Current-Density Field Emission Cathode

Award Information

Department of Energy
Award ID:
Program Year/Program:
2004 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Omega-P, Inc.
291 Whitney Ave. New Haven, CT 06511-3765
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2004
Title: RF Gun with High-Current-Density Field Emission Cathode
Agency: DOE
Contract: DE-FG02-04ER86193
Award Amount: $100,000.00


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.

Principal Investigator:

Jay L. Hirshfield

Business Contact:

George P. Trahan
Small Business Information at Submission:

Omega-p, Inc.
199 Whitney Avenue New Haven, CT 06511

EIN/Tax ID: 562040484
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
Florida International University
11200 SW 8th St
MARC 430
Miami, FL 33199
Contact: J. Torres
RI Type: Nonprofit college or university