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TTF2 Start-to-End Simulations
Jean-Paul CarneiroDESY Hamburg
TESLA COLLABORATION MEETING
DESY Zeuthen, 22 Jan 2004
S2E simulation web site (TTF1, TTF2, XFEL)
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 wihout 3.9 GHz cavity : Case 0.5 nC, 4 ps sigma, magnetic compression• Operation without 3.9 GHz cavity : Case 1.0 nC, 4 ps sigma, velocity bunching • Operation without 3.9 GHz cavity : Case 1.0 nC, 20 ps flat top, velocity bunching
• XFEL • Benchmark S2E workshop, August 2003 (20.5 GeV, 3 chicanes, 12 kA peak)• 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
TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression (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 BC3ACC2
RF GUN
ACC3 ACC4 ACC5 ACC6 ACC7
UNDULATOR
%5.0σ
mm 1.4zσ
MeV 124
%32.0σ
mm51.0zσ
MeV 374
%27.0σ
mm37.0zσ
MeV 439
ACC1
LASER 4 ps sigma RMS, 3 mm uniformRF GUN 40 MV/m , 31 DegSOLENOIDS 0.163 TACC1 8 × 14 MV/m, 8 × -8.5 Deg w.r.t on crestBC2 18 Deg
ACC2 & ACC3 15.31 MV/m, 78 DegBC3 3.8 DegACC4 7.85 MV/m, 90 DegACC5, ACC6 & ACC7 offUNDULATOR ???
Jean-Paul Carneiro TTF2 Start-to-End Simulations
TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression
-4 -3 -2 -1 0 1 2 3 40
5
10
15
20
25
30
35
40
45
50Current Distribution Z=13.59 METERS / 500 pC Case
Z [mm]
Cur
rent
[A
]
TAIL HEAD
END INJECTOR (13.59 m) / RMS Bunch Length ~ 1.4 mm
Jean-Paul Carneiro TTF2 Start-to-End Simulations
-4 -3 -2 -1 0 1 2 3 40
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5Slice Emittance Z=13.59 METERS / 500 pC Case
Z [mm]
Em
ittan
ce [
mm
-mra
d]
TAIL HEAD
X
Y
TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression
END INJECTOR (13.59 m) / Projected RMS Emittance ~ 1.6 mm-mrad
Jean-Paul Carneiro TTF2 Start-to-End Simulations
-4 -3 -2 -1 0 1 2 3 40
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1Slice RMS size Z=13.59 METERS / 500 pC Case
Z [mm]
RM
S s
ize
[mm
]
TAIL HEAD
x
y
TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression
END INJECTOR (13.59 m) / Projected RMS Size ~ 0.36 mm
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
Jean-Paul Carneiro TTF2 Start-to-End Simulations
-4 -3 -2 -1 0 1 2 3 40
1
2
3
4
5
6
7
8
9
10Slice Energy Spread Z=13.59 METERS / 500 pC Case
Z [mm]
Ene
rgy
Spr
ead
[keV
/c]
TAIL HEAD
TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression
END INJECTOR (13.59 m) / Total Energy Spread ~ 626 keV
Jean-Paul Carneiro TTF2 Start-to-End Simulations
-1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.40
200
400
600
800
1000
1200
1400Current Distribution Z=13.59 METERS / 500 pC Case
Z [mm]
Cur
rent
[A
]
TAIL HEAD
0.31 0.315 0.32 0.325 0.33 0.335 0.34 0.345 0.35 0.355 0.360
200
400
600
800
1000
1200
1400Current Distribution End Linac/ 500 pC Case
Z [mm]
Cur
rent
[A
]
ZOOM CURRENT DISTRIBUTION
TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression
ENTRANCE ONDULATOR
50 µm / 1.3 kA
Jean-Paul Carneiro TTF2 Start-to-End Simulations
-1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.40
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5Slice Emittance End Linac / 500 pC Case
Z [mm]
Em
ittan
ce [
mm
-mra
d]
TAIL HEAD
X
Y
0.31 0.315 0.32 0.325 0.33 0.335 0.34 0.345 0.35 0.355 0.360
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2Slice Emittance End Linac / 500 pC Case
Z [mm]E
mitt
ance
[m
m-m
rad]
ZOOM SLICE EMITTANCE
X
Y
TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression
1.2 mm-mrad
ENTRANCE ONDULATOR
Jean-Paul Carneiro TTF2 Start-to-End Simulations
-1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.40
100
200
300
400
500
600Slice Energy Spread End Linac / 500 pC Case
Z [mm]
Ene
rgy
Spr
ead
[keV
/c]
TAIL HEAD
0.31 0.315 0.32 0.325 0.33 0.335 0.34 0.345 0.35 0.355 0.360
100
200
300
400
500
600Slice Energy Spread End Linac / 500 pC Case
Z [mm]
Ene
rgy
Spr
ead
[keV
/c]
ZOOM SLICE ENERGY SPREAD
TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression
~ 200 keV
ENTRANCE ONDULATOR
Jean-Paul Carneiro TTF2 Start-to-End Simulations
TTF2 / Case 0.5 C, 4 ps laser pulse, magnetic compression
ENTRANCE ONDULATOR
Jean-Paul Carneiro TTF2 Start-to-End Simulations
-1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.40
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4Slice RMS size End Linac / 500 pC Case
Z [mm]
RM
S s
ize
[mm
]
TAIL HEAD
x
y
0.31 0.315 0.32 0.325 0.33 0.335 0.34 0.345 0.35 0.355 0.360
0.05
0.1
0.15
0.2
0.25Slice RMS size End Linac / 500 pC Case
Z [mm]
RM
S s
ize
[mm
]
ZOOM SLICE SIZE
x
y
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.
Jean-Paul Carneiro
ACC 1 DOUBLET RF GUN+ SOLENOIDES
dump
Bunch Charge 1 nCLaser Diameter 3 mm (uniform)Laser pulse length Case 4 ps gaussian and 20 ps flat topSolenoid Bmax 163 mTPhase Gun ~ 31 DegField Cathode 40 MV/mACC1 (cav 1 to 8) 14 MV/mPhases 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
Jean-Paul Carneiro TTF2 Start-to-End Simulations
TTF2 Velocity Bunching
-30 -20 -10 0 10 20 300
500
1000
1500
2000
Time [ps]P
op
ula
tion
-15 -10 -5 0 5 10 150
500
1000
1500
2000
2500
Time [ps]
Po
pu
latio
n
Case 4 ps sigma RMS4 ps RMS laser pulse cut at 3 sigma
Therm. Emit. 0.55 eV
Case 20 ps flat top4 ps RMS laser pulse cut at 3 sigma
Therm. Emit. 0.55 eV
Jean-Paul Carneiro TTF2 Start-to-End Simulations
TTF2 Velocity Bunching
-140 -120 -100 -80 -60 -40 -20 00.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
Phase First Cavity [Deg]
RM
S B
unch
Len
gth
z [
mm
]
Velocity Bunching Case 4 ps RMS Laser Pulse
-140 -120 -100 -80 -60 -40 -20 00
0.5
1
1.5
2
2.5
3
Phase First Cavity [Deg]R
MS
Bun
ch L
engt
h
z [m
m]
Velocity Bunching Case 20 ps Flat Top Laser Pulse
END INJECTOR (13.59 m)
Case 4 ps Case 20 ps
Jean-Paul Carneiro TTF2 Start-to-End Simulations
TTF2 Velocity Bunching
-140 -120 -100 -80 -60 -40 -20 0108
110
112
114
116
118
120
122
124
126
Phase First Cavity [Deg]
Mom
entu
m [
Mev
/c]
Velocity Bunching Case 4 ps RMS Laser Pulse
-140 -120 -100 -80 -60 -40 -20 0108
110
112
114
116
118
120
122
124
126
Phase First Cavity [Deg]M
omen
tum
[M
ev/c
]
Velocity Bunching Case 20 ps Flat Top Laser Pulse
END INJECTOR (13.59 m)
Case 4 ps Case 20 ps
Jean-Paul Carneiro TTF2 Start-to-End Simulations
TTF2 Velocity Bunching
-140 -120 -100 -80 -60 -40 -20 00
500
1000
Ene
rgy
Spr
ead
[keV
]
Phase First Cavity [Deg]
Velocity Bunching Case 20 ps Flat Top Laser Pulse
-140 -120 -100 -80 -60 -40 -20 00
0.5
1
Ene
rgy
Spr
ead
[%]
Energy Spread [keV]Energy Spread [%]
-140 -120 -100 -80 -60 -40 -20 0100
200
300
400
500
600
Ene
rgy
Spr
ead
[keV
]
Phase First Cavity [Deg]
Velocity Bunching Case 4 ps RMS Laser Pulse
-140 -120 -100 -80 -60 -40 -20 00.1
0.2
0.3
0.4
0.5
0.6
Ene
rgy
Spr
ead
[%]
Energy Spread [keV]Energy Spread [%]
END INJECTOR (13.59 m)
Case 4 ps Case 20 ps
Jean-Paul Carneiro TTF2 Start-to-End Simulations
TTF2 Velocity Bunching
-140 -120 -100 -80 -60 -40 -20 00
10
20
30
40
50
60
Phase First Cavity [Deg]
RM
S E
mitt
ance
(
x= x )
[m
m-m
rad]
Velocity Bunching Case 4 ps RMS Laser Pulse
-140 -120 -100 -80 -60 -40 -20 00
10
20
30
40
50
60
70
80
90
Phase First Cavity [Deg]R
MS
Em
ittan
ce (
x=
x ) [
mm
-mra
d]
Velocity Bunching Case 20 ps Flat Top Laser Pulse
END INJECTOR (13.59 m)
Case 4 ps Case 20 ps
Jean-Paul Carneiro TTF2 Start-to-End Simulations
TTF2 Velocity Bunching
-140 -120 -100 -80 -60 -40 -20 00
0.5
1
1.5
2
2.5
3
3.5
4
Phase First Cavity [Deg]R
MS
Tra
nsve
rse
Siz
e (
x=
y ) [
mm
]
Velocity Bunching Case 20 ps Flat Top Laser Pulse
-140 -120 -100 -80 -60 -40 -20 00
0.5
1
1.5
2
2.5
3
3.5
4
Phase First Cavity [Deg]
RM
S T
rans
vers
e S
ize
( x=
y )
[m
m]
Velocity Bunching Case 4 ps RMS Laser Pulse
END INJECTOR (13.59 m)
Case 4 ps Case 20 ps
Jean-Paul Carneiro TTF2 Start-to-End Simulations
TTF2 Velocity Bunching
-140 -120 -100 -80 -60 -40 -20 050
100
150
200
250
300
350
400
Phase First Cavity [Deg]
Long
itudi
nal E
mitt
ance
(
z ) [
keV
-mm
]
Velocity Bunching Case 4 ps RMS Laser Pulse
-140 -120 -100 -80 -60 -40 -20 0100
150
200
250
300
350
400
450
500
550
600
Phase First Cavity [Deg]Lo
ngitu
dina
l Em
ittan
ce (
z )
[
keV
-mm
]
Velocity Bunching Case 20 ps Flat Top Laser Pulse
END INJECTOR (13.59 m)
Case 4 ps Case 20 ps
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