calculation of xfel injector with parmela c é cile limborg-déprey, slac august 18, 2003
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Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
Calculation of XFEL injector with PARMELA
Cécile Limborg-Déprey, SLACAugust 18, 2003
Calculation of XFEL injector with PARMELA
Cécile Limborg-Déprey, SLACAugust 18, 2003
Beamline descriptionBeamline description Comparison of ParametersComparison of Parameters To do listTo do list
Beamline descriptionBeamline description Comparison of ParametersComparison of Parameters To do listTo do list
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
Description XFEL injectorDescription XFEL injector
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
Description TTF 2 beamlineDescription TTF 2 beamline
z = 0 z = 0.25m z = 2.32m z = 13.36 m z =16.1 m z = 19 m
1nC20ps square pulse with 3s rising edge 3 mm diameter uniform transverse laser pulse Thermal emittance , Ekin=0.55 eV 40MV/m Solenoid 1.6 kG
1nC20ps square pulse with 3s rising edge 3 mm diameter uniform transverse laser pulse Thermal emittance , Ekin=0.55 eV 40MV/m Solenoid 1.6 kG
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
RF Phase TuningRF Phase TuningDefine reference particle center of bunch
Define reference phase maximum energy
RF Phase TuningRF Phase TuningDefine reference particle center of bunch
Define reference phase maximum energy
Tuning with PARMELA to match ASTRA outputTuning with PARMELA to match ASTRA output
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
Reference Particle in PARMELA at center of bunch Reference Particle in PARMELA at center of bunch Reference Particle in PARMELA at center of bunch Reference Particle in PARMELA at center of bunch
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
Summary of results
Good agreement
Emittance (mm.nrad)
1.38 (PARM.) / 1.28 (ASTRA)
Sigma_x (mm)
0.4 (PARM.) / 0.35 (ASTRA)
Perfect agreement on bunch length and energy
ASTRA
PARMELA
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
Summary of results in gun
Very Good agreement
Small discrepancy in emittance
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
At 0.25m (Gun Exit)
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
At 14 m
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
At 19 m
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
SensitivitySensitivity SensitivitySensitivity
TTF2
LCLS+10% +10%
+10%+10%
Start-to-End Simulations Workshop , 18-22 August 2003Start-to-End Simulations Workshop , 18-22 August 2003 CCéécile Limborg-Déprey, SLACcile Limborg-Déprey, SLAC
Simulations of TTF2 with PARMELASimulations of TTF2 with PARMELA Limborg@slac.stanford.eduLimborg@slac.stanford.edu
ConclusionConclusionGood agreement between codesGood agreement between codes
Same field maps, initial distribution Same field maps, initial distribution
Same algorithmSame algorithm
Only variation : meshingOnly variation : meshing
To-do-list : comparison of injectorsTo-do-list : comparison of injectorsOperating rangeOperating range
SS ensitivity studiesensitivity studiesTolerances on BTolerances on Bfieldfield, E, Efieldfield, E, Ecell1cell1/E/Ecell2cell2 ,Gun ,Gunphasephase, Charge , Acc. Fields, Phases, Charge , Acc. Fields, Phases
Tolerance on mis-positioning of componentsTolerance on mis-positioning of components
ConclusionConclusionGood agreement between codesGood agreement between codes
Same field maps, initial distribution Same field maps, initial distribution
Same algorithmSame algorithm
Only variation : meshingOnly variation : meshing
To-do-list : comparison of injectorsTo-do-list : comparison of injectorsOperating rangeOperating range
SS ensitivity studiesensitivity studiesTolerances on BTolerances on Bfieldfield, E, Efieldfield, E, Ecell1cell1/E/Ecell2cell2 ,Gun ,Gunphasephase, Charge , Acc. Fields, Phases, Charge , Acc. Fields, Phases
Tolerance on mis-positioning of componentsTolerance on mis-positioning of components
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