Effect of gap length on effective field strength

Author

Kojima, A. ; Sato, S. ; Iijima, N. ; Sone, M. ; Mitsui, H.

Author_Institution

Dept. of Electr. & Electron. Eng., Musashi Inst. of Technol., Tokyo, Japan

fYear

1991

fDate

8-12 Jul 1991

Firstpage

824

Abstract

A micro-channel plate (MCP) was used to measure the minute emission current within the range of 1×10^-19 A to 1×10^-14 A in a high vacuum (1.3×10^-5 Pa). By a Fowler-Nordheim plot, it is found that the effective field strength for initial electron emission is mostly constant between 10⁷ and 10⁸ V/cm under any gap length. The effective field strength is held constant between 10⁷ and 10 ⁸ V/cm, independent of the current under any gap length. With this result, a model which shows the choice of minute projection is suggested. In order to certify this model, an MCP phosphor-anode is used. As a result, it is found that the minute projections which emit electrons melt with heat and are chosen when the voltage rises

Keywords

electric current measurement; electron field emission; image intensifiers; 1.3E-5 Pa; 1E-19 to 1E-14 A; Fowler-Nordheim plot; MCP phosphor-anode; effective field strength; emission current; gap length; initial electron emission; micro-channel plate; minute projections; Assembly; Brightness; Cathodes; Current measurement; Electric variables measurement; Electrodes; Electron emission; Iron; Vacuum technology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on

Conference_Location

Tokyo

Print_ISBN

0-87942-568-7

Type

conf

DOI

10.1109/ICPADM.1991.172194

Filename

172194