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