Studies of linear and nonlinear photoelectric emission for advanced accelerator applications

Author

Brogle, R. ; Muggli, P. ; Davis, P. ; Hairapetian, G. ; Joshi, C.

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

2

fYear

1995

fDate

1-5 May 1995

Firstpage

1039

Abstract

Various electron emission properties of accelerator photocathodes were studied using short pulse lasers. The quantum efficiencies (QEs) of copper and magnesium were compared before and after above-damage threshold laser cleaning. Changes in the emission properties of copper photocathodes used in the UCLA RF photoinjector gun were observed by mapping the QEs of the cathode surfaces. The electron yield of thin copper films resulting from back-side illumination was measured. Multiphoton (nonlinear) emission was studied as a means of creating ultrashort electron bunches, and an RF gun Parmela simulation investigated the broadening of such pulses as they propagate down the beam line

Keywords

beam handling techniques; copper; electron guns; magnesium; particle beam dynamics; photocathodes; photoemission; surface cleaning; 266 nm; Cu; Mg; Parmela simulation; UCLA RF photoinjector gun; above-damage threshold laser cleaning; accelerator photocathodes; advanced accelerator applications; electron emission properties; electron yield; linear photoelectric emission; multiphoton emission; nonlinear photoelectric emission; quantum efficiencies; quantum efficiency; short pulse lasers; thin Cu films; ultrashort electron bunches; Cathodes; Cleaning; Copper; Electron accelerators; Electron beams; Electron emission; Lighting; Magnesium; Optical pulses; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505122

Filename

505122