Experimental Validation of a Photoemission Model for End-to-End Beam Simulations and Custom Photocathode Designs

Author

Moody, N.A. ; Jensen, K.L. ; Feldman, D.W. ; Shea, P. G O

Author_Institution

Inst. for Res. in Electron. & Appl. Phys., Maryland Univ.

fYear

0

fDate

0-0 0

Firstpage

429

Lastpage

430

Abstract

This paper outlines the experimental techniques used to validate a photoemission model applied to metals with sub-monolayer alkali coatings. Essential features of the model are highlighted and its results are compared to experiment. Cesium was deposited in-situ on tungsten and silver polycrystalline substrates while quantum efficiency (QE) was measured as a function of surface coverage and other parameters. Good qualitative agreement with theory is demonstrated and significant differences in quantitative comparisons are addressed

Keywords

caesium; photocathodes; photoemission; silver; tungsten; Cs; W; cesium; dispenser cathode; end-to-end beam simulations; photocathode designs; photoemission model; photoinjection; quantum efficiency; silver polycrystalline substrates; sub-monolayer alkali coatings; tungsten; Cathodes; Coatings; Electron emission; Free electron lasers; Laser modes; Laser theory; Photoelectricity; Surface contamination; Surface emitting lasers; X-ray lasers; QE; dispenser cathode; photoinjection;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2006 held Jointly with 2006 IEEE International Vacuum Electron Sources., IEEE International

Conference_Location

Monterey, CA

Print_ISBN

1-4244-0108-9

Type

conf

DOI

10.1109/IVELEC.2006.1666366

Filename

1666366