Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A) Photograph of the electron gun modeled in this work. On the left side is the cathode section, and on the right side is the anode section. (B) A rendering of the gun geometry developed based on a laser scan of the electron gun. (C) A photograph of the grid taken through a microscope lens.
