Author: Corbett, W.J.
Paper Title Page
TUPWO064 Online Optimization Algorithms for Accelerators and Experimental Results 2012
 
  • X. Huang, W.J. Corbett, J.A. Safranek, J. Wu
    SLAC, Menlo Park, California, USA
 
  On­line op­ti­miza­tion of ac­cel­er­a­tors is be­com­ing in­creas­ingly more im­por­tant as ac­cel­er­a­tor sys­tems be­come more and more com­plex. On­line ac­cel­er­a­tor op­ti­miza­tion is gen­er­ally a multi-vari­ant non­lin­ear prob­lem with con­sid­er­able noise. Ef­fi­ciency and ro­bust­ness are crit­i­cal for on­line ap­pli­ca­tions. There­fore op­ti­miza­tion al­go­rithms re­quire spe­cial con­sid­er­a­tions. In this study we eval­u­ate the vi­a­bil­ity of sev­eral on­line op­ti­miza­tion al­go­rithms for both ring and linac ma­chines. Nu­mer­i­cal sim­u­la­tions and ex­per­i­men­tal tests are pre­sented to in­ves­ti­gate per­for­mance of the al­go­rithms.  
 
WEPME062 Short-Pulse Ti:Sapphire Laser System for Photocathode Research at SLAC 3076
 
  • W.J. Corbett, A. Brachmann, R.N. Coffee, A.R. Fry, S. Gilevich, N. Hartmann, W. Helml, P. Hering, E.N. Jongewaard, D. Kelley, J.R. Lewandowski, W. Polzin, J. Sheppard, P. Stefan, T. Vecchione, S.P. Weathersby, W.E. White, M. Woods, F. Zhou
    SLAC, Menlo Park, California, USA
 
  A photo-cath­ode re­search lab­o­ra­tory has been con­structed at SLAC to test and char­ac­ter­ize the spare LCLS elec­tron gun. At the heart of the lab­o­ra­tory is a dual-pur­pose Ti:Sap­phire os­cil­la­tor/regen laser that can de­liver ei­ther a 2.5ps, 760nm beam to the pho­to­cath­ode gun or a 35fs, 800nm beam to pro­to­type di­ag­nos­tics for the LCLS. The ob­jec­tive of the pho­to­cath­ode re­search is to de­fin­i­tively iden­tify ‘recipes’ for high-re­li­a­bil­ity cath­ode pro­cess­ing re­sult­ing in high quan­tum ef­fi­ciency and low beam emit­tance. The LCLS di­ag­nos­tics pro­gram is presently aimed at de­vel­op­ing spec­tral-en­cod­ing sys­tems for shot-by-shot pulse ar­rival time mea­sure­ments at the 10fs level. In this paper we re­view the Ti:Sap­phire laser sys­tem and re­port on sta­tus of the pho­to­cath­ode and di­ag­nos­tics pro­grams.