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

DOI

10.3906/fiz-1208-8

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.

Keywords

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

First Page

219

Last Page

228

Recommended Citation

AL-TABBAKH, AHMED ABDURRAHMAN AHMED; MORE, MAHENDRA A.; and JOAG, DILIP S. (2013) "Development and utilization of a retarding analyzer for field emission investigation of LaB_6/W emitter," Turkish Journal of Physics: Vol. 37: No. 2, Article 9. https://doi.org/10.3906/fiz-1208-8
Available at: https://journals.tubitak.gov.tr/physics/vol37/iss2/9