Transcript Document

S2E Meeting on 07.04.2013
Yauhen Kot
Plans for March 2013 and Achieved Progress
1. Track 250pC and 500pC within the same optics and RF parameters.
establish suitable bunch distributions for lasing: 25%  100%
2. Check Lasing of these Bunches: 0%  50%
3. Internal report about S2E Simulations for XFEL
for pair 250/500pC: 0%  20%
500pC. Combined WP with 250pC. Summary After S2E
500pC. Combined WP with 250pC. Single Laser and Solenoid. At s=1630m
1.4
slice emittance hor. mm mrad
slice emittance vert., mm mrad
Current, kA/5
slice energy spread, MeV
1.2
Emittance x
𝟒. 𝟖𝟔 ∙ 𝟏𝟎−𝟕
Emittance y
1.37 ∙ 10−6
1
a. u.
0.8
Peak Current
5.2 kA
Mismatch x
1.016
Mismatch y
1.061
0.6
0.4
0.2
0
-50
-40
-30
-20
-10
m
0
10
20
30
40
500pC. Combined WP with 250pC. Longitudinal Phase Space After S2E
500pC. Combined WP with 250pC. Longitudinal Phase Space
Final Energy, GeV
17.44
de/e
17.435
17.43
𝟐. 𝟖𝟒 ∙ 𝟏𝟎−𝟒
Bunch length rms
1.304 ∙ 10−5 m
Bunch length rms
43.47 fs
17.425
17.42
17.415
-30
-20
-10
m
0
10
20
500pC. Combined WP with 250pC. SASE Simulations
500pC. Combined WP with 250pC. Single Laser and Solenoid. At s=1630m
1.4
slice emittance hor. mm mrad
slice emittance vert., mm mrad
Current, kA/5
slice energy spread, MeV
1.2
1
0.8
a. u.
45 m of bunch simulated
beginning after first 11m
0.6
0.4
0.2
0
-50
Maximum Power along Undulators
-40
-30
-20
-10
m
0
10
20
Maximum Power along Bunch
30
40
250pC. Combined WP with 500pC. Summary After BC2
250pC. Combined WP with 500pC. Summary at s=391.38m
1.6
Emittance x
3. 𝟒𝟓𝟕 ∙ 𝟏𝟎−𝟕
Emittance y
1.714 ∙ 10−6
1.4
1.2
1
0.8
0.6
Peak Current
7.8 kA
Mismatch x
1.007
Mismatch y
1.039
0.4
0.2
0
-30
-25
-20
-15
-10
-5
0
5
10
15
20
250pC. Combined WP with 500pC. Longitudinal Phase Space After BC2
de/e
2.285
𝟐. 𝟖𝟗 ∙ 𝟏𝟎−𝟑
Energy, GeV
2.29
Bunch length rms
0.730 ∙ 10−5 m
Bunch length rms
24.33 fs
2.295
2.3
2.305
2.31
-25
-20
-15
-10
-5
m
0
5
10
15
Difficulties
- Different chirp for 250pC and 500pC at entrance BC2
250pC vs Reference
2315
2310
2305
2300
2295
2290
2285
2280
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
x 10
-4
Plans for the Next Month
A. Finish this work:
1. Track 250pC and 500pC within the same optics and RF parameters.
establish suitable bunch distributions for lasing: 25%  100%
2. Check Lasing of these Bunches: 0%  50%
3. Internal report about S2E Simulations for XFEL
for pair 250/500pC: 0%  20%
B. To be discussed
- implement back the gaussian laser
…