# Presentation: 683034

## TTF2 Start-to-End Simulations 

**TTF2 Start-to-End Simulations **
- Jean-Paul Carneiro
- DESY Hamburg
- TESLA COLLABORATION MEETING
- DESY Zeuthen, 22 Jan 2004

## S2E simulation web site (TTF1, TTF2, XFEL)

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**	****	****	****Start-to-End Simulations ****	****	**
**                                         ****	****     ****TTF1, TTF2 and XFEL**
**•****TTF1**
**• ****Start-to-End Simulations of SASE FEL at the TESLA Test Facility, Phase 1. **
**•****TTF2 **
**• ****Optimized version (6.4 nm, 1GeV) **
**• **_[Operation ](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v2/ttf2_v2.htm)__[wihout](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v2/ttf2_v2.htm)__[ 3.9 GHz cavity : Case 0.5 ](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v2/ttf2_v2.htm)__[nC](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v2/ttf2_v2.htm)__[, 4 ](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v2/ttf2_v2.htm)__[ps](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v2/ttf2_v2.htm)__[ sigma, magnetic compression](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v2/ttf2_v2.htm)_
**• **_[Operation without 3.9 GHz cavity : Case 1.0 ](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v3/ttf2_v3.htm)__[nC](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v3/ttf2_v3.htm)__[, 4 ](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v3/ttf2_v3.htm)__[ps](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v3/ttf2_v3.htm)__[ sigma, velocity bunching](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v3/ttf2_v3.htm)_** **
**• **_[Operation without 3.9 GHz cavity : Case 1.0 ](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v4/ttf2_v4.htm)__[nC](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v4/ttf2_v4.htm)__[, 20 ](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v4/ttf2_v4.htm)__[ps](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v4/ttf2_v4.htm)__[ flat top, velocity bunching](file://MPYXLCARNEI-AFS/auto1/www/html/ttf2/ttf2_v4/ttf2_v4.htm)_** **
**• ****XFEL **
**• **_[Benchmark S2E workshop, August 2003 (20.5 ](http://desyntwww.desy.de/S2E/TESLAXFEL_files.htm)__[GeV](http://desyntwww.desy.de/S2E/TESLAXFEL_files.htm)__[, 3 chicanes, 12 kA peak)](http://desyntwww.desy.de/S2E/TESLAXFEL_files.htm)_
**• ****Revised version of the S2E workshop benchmark with 5 kA peak**
**• ****Benchmark ESFRI XFEL workshop, October 2003 (20.0 GeV, 2 chicanes, 5 kA)**

| Last Updated: | 13 January 2004 |
| --- | --- |
| Content Owner: | J.-P. Carneiro, DESY |
| Page Editor: | J.-P. Carneiro, DESY |

******  ****http://www.desy.de/s2e-simu**

## Case No CSR, No Wakefields, ASTRA+ELEGANT, 100k particules, 1000 slices. 

**(E. Schneidmiller proposal, Optics optimization by N. Golubeva)**** **

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

- Case No CSR, No Wakefields, ASTRA+ELEGANT, 100k particules, 1000 slices.

- BC2

- BC3

- ACC2

- RF GUN

- ACC3

- ACC4

- ACC5

- ACC6

- ACC7

- UNDULATOR

- ACC1

**LASER****	****	****4 ps sigma RMS, 3 mm uniform**
**RF GUN  ****	****	****40 MV/m , 31 Deg**
**SOLENOIDS****	****	****0.163 T**
**ACC1 ****	****	****8 ****× ****14 MV/m, 8 ×**** ****-8.5 Deg w.r.t on crest**
**BC2****	****	****18 Deg**

**ACC2 & ACC3 ****	****15.31 MV/m, 78 Deg****	**
**BC3****	****	****3.8 Deg****	**
**ACC4****	****	****7.85 MV/m, 90 Deg**
**ACC5, ACC6 & ACC7****	****off**
**UNDULATOR****	****???**

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression**

- END INJECTOR (13.59 m) / RMS Bunch Length ~ 1.4 mm

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression**

- END INJECTOR (13.59 m) / Projected RMS Emittance   ~ 1.6 mm-mrad

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression**

- END INJECTOR (13.59 m) / Projected RMS Size   ~ 0.36 mm

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression**

- END INJECTOR (13.59 m) / Total Energy 124.25 MeV

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression**

- END INJECTOR (13.59 m) / Total Energy Spread ~ 626 keV

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression**

- ENTRANCE ONDULATOR

- 50 μm / 1.3 kA

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression**

- 1.2 mm-mrad

- ENTRANCE ONDULATOR

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression**

- ~ 200 keV

- ENTRANCE ONDULATOR

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression**

- ENTRANCE ONDULATOR

## TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression (E. Schneidmiller proposal) 

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression (E. Schneidmiller proposal) **

- ENTRANCE ONDULATOR

## }

- Jean-Paul Carneiro

**RESUME Case 0.5 nC **

- TTF2 Start-to-End Simulations

- • Peak Current            	: 1.3 kA			Saturation at λ = 31 nm
-   Slice Emittance         	: 1.2 mm-mrad	 	Saturation Length L ~ 11 m
-   Slice Energy Spread	: 200 keV		     	Saturation Power P ~ 1.8 GW
-   Total Energy                  : 439 MeV

- For this configuration (No CSR effects, No Space Charge from BC2 to end linac, No Wakefields :

-  If energy increases to 1 GeV 			 λ = 6.1 nm, L ~ 19 m, P ~ 2.3 GW

- From PARMS
-  B. Faatz

- • Case 500pc looks promising. Need to add CSR, Wakefields effects and Space Charge in the linac.

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- ACC 1

- DOUBLET

-       RF GUN
- + SOLENOIDES

- dump

- Bunch Charge	1 nC
- Laser Diameter 	3 mm (uniform)
- Laser pulse length 	Case 4 ps gaussian and 20 ps flat top
- Solenoid Bmax	163 mT
- Phase Gun		~ 31 Deg
- Field Cathode	40 MV/m
- ACC1 (cav 1 to 8)	14 MV/m
- Phases ACC1	Change Phase First Cavity and run other 7 cavities at max energy.

- _STOP SIMULATIONS AT Z =13.59 M_

**TTF2 Velocity Bunching**
**(K. Floettmann proposal)**

- TTF2 Start-to-End Simulations

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 Velocity Bunching**

- Case 4 ps sigma RMS
- 4 ps RMS laser pulse cut at 3 sigma
- Therm. Emit. 0.55 eV

- Case 20 ps flat top
- 4 ps RMS laser pulse cut at 3 sigma
- Therm. Emit. 0.55 eV

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 Velocity Bunching**

- END INJECTOR (13.59 m)

_**Case 4 ps**_** **

_**Case 20 ps **_

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 Velocity Bunching**

- END INJECTOR (13.59 m)

_**Case 4 ps**_** **

_**Case 20 ps **_

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 Velocity Bunching**

- END INJECTOR (13.59 m)

_**Case 4 ps**_** **

_**Case 20 ps **_

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 Velocity Bunching**

- END INJECTOR (13.59 m)

_**Case 4 ps**_** **

_**Case 20 ps **_

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 Velocity Bunching**

- END INJECTOR (13.59 m)

_**Case 4 ps**_** **

_**Case 20 ps **_

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 Velocity Bunching**

- END INJECTOR (13.59 m)

_**Case 4 ps**_** **

_**Case 20 ps **_

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 Velocity Bunching**

- • Case 4 ps
-    Phase -92 Deg

## TTF2 Velocity Bunching

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

**TTF2 Velocity Bunching**

- • Case 20 ps
-    Phase -91 Deg

## RESUME Velocity Bunching 

- Jean-Paul Carneiro

- TTF2 Start-to-End Simulations

- • Velocity Bunching needs much more studies (s2e, jitter,...)

**RESUME Velocity Bunching **