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Simulation for TW FEL @ LCLS-II. Working with T. Raubenheimer, H.-D. Nuhn, M. Rowen, et al. Tor’s question on the dependence of TW FEL on the electron energy Looking at 13 keV (0.955 Å) FEL Seeded FEL with 1 MW seed: - PowerPoint PPT Presentation
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SIMULATION FOR TW FEL @ LCLS-II
Tor’s question on the dependence of TW FEL on the electron energy
Looking at 13 keV (0.955 Å) FEL Seeded FEL with 1 MW seed:Obtained based on the SASE FEL simulation with 10 undulators for
Electron bunch energy of 13.64 GeV (43.136 m)Electron energy 10.5, 12, and 13.64 GeV
LCLS-II Undulator: period 3.2 cm, each undulator magnetic section is 3.4 m, and break length is 1 mElectron bunch:
Start-to-end beam: mimic of ideal bunch with 4 kA peak current, 0.3 mm-mrad emittance, and 1.3 MeV slice energy spread
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
Working with T. Raubenheimer, H.-D. Nuhn, M. Rowen, et al.
SIMULATION FOR TW FEL @ LCLS-II: ELECTRON 13.64 GEV
13 keV FEL through a single crystal 0.1 mm thick C(400) with 1.2E-05 (FWHM) bandwidthThe FEL centered @ 0.9547 Å
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
SASE
SIMULATION FOR TW FEL @ LCLS-II: ELECTRON 13.64 GEV
13 keV FEL through a single crystal 0.1 mm thick C(400): 1.2E-05 (FWHM) bandwidth with Bragg angle 32o
The FEL centered @ 0.9547 Å
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
Seed
SIMULATION FOR TW FEL @ LCLS-II
SASE FEL in the seed bandwidth: Gamma-distribution
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
Seeded TW
E
EM
EE
E
M
MEp
MM
exp1
)()(
1
Seeded TW: Taper profile for 1 MW seed
Ideal flattop electron bunch
SIMULATION FOR TW FEL @ LCLS-II
With S-2-E beam: tuning (in simulation) details
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
SIMULATION FOR TW FEL @ LCLS-II
With S-2-E beam: tuning (in simulation) details
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
SIMULATION FOR TW FEL @ LCLS-II
With S-2-E beam: tuning (in simulation) details
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
SIMULATION FOR TW FEL @ LCLS-II
With S-2-E beam: tuning (in simulation) details
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
SIMULATION FOR TW FEL @ LCLS-II
With S-2-E beam: tuning (in simulation) details
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
SIMULATION FOR TW FEL @ LCLS-II
With S-2-E beam: energy dependence
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
Need to fu
rther w
ork
on the 12 GeV ca
se
SIMULATION FOR TW FEL @ LCLS-II
With S-2-E beam: energy dependence: FEL pulse temporal profile @ 200 m
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
Need to fu
rther w
ork
on the 12 GeV ca
se
SIMULATION FOR TW FEL @ LCLS-II
Heinz-Dieter N., Tor R., and Michael R. ’s question on the dependence of high power FEL on the FEL wavelength
Hard X-rays: 8, 13, and 18 keV (Tor showed just now) [will add 4 and 6 keV]Soft X-rays: 0.25 and 2 keV [will add 1 keV]
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
SIMULATION FOR TW FEL @ LCLS-II
X-ray parameter table2 keV: 0.1 MW seed, 3 kA, 40 pC, 0.5 mm-mrad; 0.25 keV: 20 kW seed, 2 kA, 100 pC, 0.5 mm-mrad
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
FEL Energy (keV)
K Electron Energy (GeV)
lw (cm)
0.25 7.8 6.77 5.5
1 3.86 7 5.5
2 3.9 10 5.5
4 3.58 10 3.2
6 3.5 12 3.2
SIMULATION FOR TW FEL @ LCLS-II
With S-2-E beam: 0.25 keV and 2 keV FEL
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
SIMULATION FOR TW FEL @ LCLS-II
With S-2-E beam: 0.25 keV and 2 keV FEL
FEL and Beam Phys. Dept. (ARD/SLAC), J. Wu, [email protected]
