Parallel operation of SASE1 and SASE3 · -300-200-100 0 100 200 300 0 200 400 600 800 1000 ( m)...
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DESY – Beam Dynamic Meeting 10 August 2015 Parallel operation of SASE1 and SASE3 Artsrun Sargsyan, Vahe Sahakyan
Transcript of Parallel operation of SASE1 and SASE3 · -300-200-100 0 100 200 300 0 200 400 600 800 1000 ( m)...
DESY – Beam Dynamic Meeting
10 August 2015
Parallel operation of SASE1 and SASE3
Artsrun Sargsyan, Vahe Sahakyan
Introduction
Conversion scripts
Numerical simulations
• 17,5 GeV beam energy
• 14 GeV beam energy
Next steps
Contents
Introduction
1. astra2elegant (MATLAB script)
2. elegant2genesis (SDDS ToolKit)
3. genesis2elegant (MATLAB script)
4. elegant2genesis
Kick Correction
1 2 3 4
Conversion scripts Considered cases
Beam energy (GeV)
SASE1 (nm)
SASE3 (nm)
17.5 0.1 0.4
14 0.23 0.4
Goal: To achieve parallel operation of SASE1 and SASE3.
Conversion scripts
1. astra2elegant
2. elegant2genesis
3. genesis2elegant
ASTRA beam file
(x, y, z, px, py, pz, ….)
ELEGANT beam file
(x, x’, y, y’, t, , ….)
MATLAB script
This program is a part of SDDS ToolKit
GENESIS ELEGANT
All slices have the same number of macro particles, but different currents.
All macro particles, have the same charge.
Different treatment of macro particles
Cu
rren
t
s
genesis2elegant
maxI
INN ipi
pN
iI
maxI
-particles per slice
-current of i-th slice
-max. current
-300
-200
-100
0
100
200
300
0 200 400 600 800 1000
Be
am C
en
tro
id (
m)
s(m)
Numerical simulations
TL+T2 SASE1 T4 SASE3
Kick by KFBX.1893.TL fast kicker and correction by CEX.2795.T4 and CEX.2799.T4 correctors
Kick Correction
Considered cases for kick values
17,5 GeV • 2 rad kick • 4 rad kick • 6 rad kick
Beam centroid for 17,5 GeV case when kick is equal to 4 rad
14 GeV • 4 rad kick • 6 rad kick • 8 rad kick
Max. traj. deviation 500 m
Corrector max. kick 20 rad
Numerical simulations (E=17,5 GeV, Q=1nC )
34230
34235
34240
34245
34250
34255
-80 -60 -40 -20 0 20 40 60 80 100
s(m)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
-80 -60 -40 -20 0 20 40 60 80 100
Ene
rgy
spre
ad (
Me
V)
s(m)
0
1000
2000
3000
4000
5000
6000
-80 -60 -40 -20 0 20 40 60 80 100
Bu
nch
cu
rre
nt
(A)
s(m)
0
0.5
1
1.5
2
2.5
3
3.5
4
-80 -60 -40 -20 0 20 40 60 80 100
Emit
tan
ce (
m)
s(m)
EMITX
EMITY
ASTRA beam before TL section
Beam file provided by Guangyao Feng
x = 0,9 m, y = 1,08 m
Numerical simulations (E=17,5 GeV, Q=1nC )
0
1
2
3
4
5
6
7
8
9
10
0 20 40 60 80 100 120 140
Ene
rgy
spre
ad (
Me
V)
s (m)
No Kick2 urad kick4 urad kick6 urad kick
0.000001
0.00001
0.0001
0.001
0.01
0.1
1
10
0 50 100 150 200 250
Rad
. En
erg
y (m
J)
z (m)
No Kick
2 urad kick
4 urad kick
6 urad kick
Rad. energy along SASE1 (0,1 nm) Energy spread after SASE1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0 20 40 60 80 100 120 140 160
Ene
rgy
spre
ad (
Me
V)
s (m)
Energy spread after SASE1 for 6 rad kick
Kick value Lsat Esat
No kick 1 1
2 rad 1,75 0,43
4 rad - -
6 rad - -
Rel. changes of sat. length and rad. energy at sat.
Numerical simulations (E=17,5 GeV, Q=1nC )
Rad. energy along SASE3 (0,4 nm)
Kick value Lsat Esat
SASE1 OFF 1 1
6 rad 1,02 0,95
4 rad 1,04 0,91
2 rad 1,12 0,7
No kick - -
Rel. changes of sat. length and rad. energy at sat.
0.0000001
0.000001
0.00001
0.0001
0.001
0.01
0.1
1
10
0 20 40 60 80 100 120 140
Rad
. En
erg
y (m
J)
z (m)
SASE1 OFF
6 urad kick
4 urad kick
2 urad kick
No kick
0
1000
2000
3000
4000
5000
6000
-80 -60 -40 -20 0 20 40 60 80 100
Bu
nch
cu
rre
nt
(A)
s(m)
x = 0,91 m, y = 1,08 m
27380
27385
27390
27395
27400
27405
27410
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s(m)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
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Ene
rgy
spre
ad (
Me
V)
s(m)
0
0.5
1
1.5
2
2.5
3
3.5
4
-80 -60 -40 -20 0 20 40 60 80 100
Emit
tan
ce (
m)
s(m)
EMITX
EMITY
Numerical simulations (E=14 GeV, Q=1nC )
ASTRA beam before TL section
Numerical simulations (E=14 GeV, Q=1nC )
Rad. energy along SASE1 (0,23 nm) Energy spread after SASE1
Beam centroid along SASE1 for 4rad kick
Kick value Lsat Esat
No kick 1 1
4 rad 1,95 0,35
6 rad - -
8 rad - -
Rel. changes of sat. length and rad. energy at sat.
0.000001
0.00001
0.0001
0.001
0.01
0.1
1
10
0 50 100 150 200 250
Rad
. En
erg
y (m
J)
z (m)
No Kick4 urad kick6 urad kick8 urad kick
-250
-200
-150
-100
-50
0
50
100
150
200
250
0 50 100 150 200
Be
am c
en
tro
id (
m)
z(m)
0
1
2
3
4
5
6
7
8
0 20 40 60 80 100 120 140 160
Ene
rgy
spre
ad (
Me
V)
s (m)
No Kick
4 urad kick
6 urad kick
8 urad kick
Numerical simulations (E=14 GeV, Q=1nC )
Rad. energy along SASE3 (0,4 nm)
Kick value Lsat Esat
SASE1 OFF 1 1
8 rad 1,02 0,78
6 rad 1,12 0,5
4 rad 1,14 0,23
No kick - -
Rel. changes of sat. length and rad. energy at sat.
0.000001
0.00001
0.0001
0.001
0.01
0.1
1
0 20 40 60 80 100 120 140
Rad
. En
erg
y (m
J)
z (m)
SASE1OFF
8 urad kick
6 urad kick
4 urad kick
No kick
Next steps
• Study the case when:
E=8.5 GeV, SASE1 = 0.62 nm KSASE1 [1.65, 3.9]
SASE3 = 1,1 nm KSASE3 [4, 9] • Study the impact of the kick position (different betatron phases at
the entrance of SASE1)
THANK YOU FOR ATTENTION
