Rf Gun with High-Current Density Field Emission Cathode

Technical Report · Mon Dec 19 00:00:00 EST 2005

DOI:https://doi.org/10.2172/861455· OSTI ID:861455

Hirshfield, Jay L

High current-density field emission from an array of carbon nanotubes, with field-emission-transistor control, and with secondary electron channel multiplication in a ceramic facing structure, have been combined in a cold cathode for rf guns and diode guns. Electrodynamic and space-charge flow simulations were conducted to specify the cathode configuration and range of emission current density from the field emission cold cathode. Design of this cathode has been made for installation and testing in an existing S-band 2-1/2 cell rf gun. With emission control and modulation, and with current density in the range of 0.1-1 kA/cm2, this cathode could provide performance and long-life not enjoyed by other currently-available cathodes

• Research Organization: Omega-P, Inc.
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: FG02-04ER86193
• OSTI ID: 861455
• Report Number(s): DOE/ER 86193-p47; TRN: US0702250
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CARBON
CATHODES
CERAMICS
CONFIGURATION
CURRENT DENSITY
DESIGN
ELECTRODYNAMICS
ELECTRONS
FIELD EMISSION
MODULATION
NANOTUBES
PERFORMANCE
SPACE CHARGE
TESTING
carbon nanotube cold cathode
field emission cathode
RF gun