- Turkish Journal of Physics
- Vol: 37 Issue: 2
- Development and utilization of a retarding analyzer for field emission investigation of LaB6/W emitt...
Development and utilization of a retarding analyzer for field emission investigation of LaB6/W emitter
Authors : Ahmed A. A. Al-tabbakh, Mahendra A. More, Dilip S. Joag
Pages : 219-228
Doi:10.3906/fiz-1208-8
View : 14 | Download : 9
Publication Date : 9999-12-31
Article Type : Makaleler
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 (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