Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505122
