Development and utilization of a retarding analyzer for field emission investigation of LaB_6/W emitter

Authors

AHMED ABDURRAHMAN AHMED AL-TABBAKH
MAHENDRA A. MORE
DILIP S. JOAG

Abstract

A cold field emission from LaB_6/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 LaB_6 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.

DOI

10.3906/fiz-1208-8

Keywords

Field electron emission, Fowler-Nordheim theory, total energy distribution, retarding field analyzer

First Page

219

Last Page

228

Recommended Citation

AL-TABBAKH, A. A, MORE, M. A, & JOAG, D. S (2013). Development and utilization of a retarding analyzer for field emission investigation of LaB_6/W emitter. Turkish Journal of Physics 37 (2): 219-228. https://doi.org/10.3906/fiz-1208-8