Rf Gun with High-Current Density Field Emission Cathode

Hirshfield, Jay L.

Omega-P, Inc.

关键词: Space Charge;    Cathodes;    Testing Carbon Nanotube Cold Cathode, Field Emission Cathode, Rf Gun;    43 Particle Accelerators;    Carbon Nanotube Cold Cathode, Field Emission Cathode, Rf Gun;   

DOI  :  10.2172/861455
RP-ID  :  DOE/ER 86193-p47
RP-ID  :  FG02-04ER86193
RP-ID  :  861455

美国|英语

来源: UNT Digital Library

【 摘 要 】

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