Title :
Field-enhanced photoemission from metals and coated materials
Author :
Jensen, Kevin L. ; Feldman, D.W. ; Moody, N.A. ; Shaw, J.L. ; Yater, J.E. ; Shea, P. G O
Author_Institution :
Vacuum Electron. Branch, Naval Res. Lab., Washington, DC, USA
Abstract :
Photocathode performance is modelled to account for issues that affect electron transport. Theoretical models of field, thermal, and surface effects on photoemission from sub-monolayer low work function coated surfaces as a function of laser parameters, temperature, and applied field are discussed. A time-dependent model of laser heating, thermal propagation, and photoemission and the relative importance of field, thermal, and photoemission contribution are presented.
Keywords :
laser beam effects; metals; photocathodes; photoemission; work function; applied field; coated materials; coated surfaces; field effects; field-enhanced photoemission; laser heating; laser parameters; metals; photocathode performance; submonolayer low work function surface; surface effects; thermal effects; thermal propagation; time-dependent model; Cathodes; Electrons; Heating; Inorganic materials; Laser modes; Laser theory; Optical materials; Photoelectricity; Surface emitting lasers; Temperature;
Conference_Titel :
Vacuum Nanoelectronics Conference, 2005. IVNC 2005. Technical Digest of the 18th International
Print_ISBN :
0-7803-8397-4
DOI :
10.1109/IVNC.2005.1619455
