Electron emission microscope for use in electron emission sites observations

An electron emission microscope (EEM) constructed for electron emission sit es observations is presented, This EEM consists of three unipotential lense s, a microchannel plate, and a phosphor screen, and has the advantage that it enables the observation of electron emission sites of not only a sharp p oint cathode, such as a field emitter, but also a broad area cathode surfac e. Experimental results obtained are as follows: i. the operation of this E EM was confirmed by observing photoelectron emission sites irradiated with ultraviolet light, and 2. field emission sites in broad area Al and Cu coul d be observed. (C) 1999 Published by Elsevier Science B.V. All rights reser ved.