Development and utilization of a retarding analyzer for field emission investigation of LaB6/W emitter

Authors : Ahmed A A ALTABBAKH, Mahendra A MORE, Dilip S JOAG

Pages : 219-228

Doi:10.3906/fiz-1208-8

View : 20 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A cold field emission from LaB6/W-coated cathodes has been investigated with a high-accuracy and low-cost retarding field analyzer instrument. Guidelines are provided for measurements of Fowler-Nordheim insert ignore into journalissuearticles values(FN); characteristics and total energy distributions using a single set-up and direct detection technique to address presumed shortages in sophisticated instrumental requirements for integral investigation. Electron emission from LaB6 nanoprotrusions, deposited on a tungsten microtip, was successfully investigated. Results emphasize a metallic behavior of the emitter in accordance with the FN theory. No size effects were observed for protrusions of 300 nm in radii.
Keywords : Field electron emission, Fowler Nordheim theory, total energy distribution, retarding field analyzer