| Paper |
Title |
Page |
| MOPC012 |
PSI XFEL Simulations with SIMPLEX and GENESIS
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91 |
| |
- V. G. Khachatryan, V. M. Tsakanov
CANDLE, Yerevan
- R. J. Bakker
PSI, Villigen
- V. V. Sahakyan, A. Tarloyan
YSU, Yerevan
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The numerical simulation results of the SASE FEL process for PSI XFEL project are presented. The main purpose of the investigations using FEL simulation codes SIMPLEX and GENESIS is the reliable definition of the undulators design parameters (K value, period, segment length, number of segments) that provide desirable radiation characteristics such as wavelength, bandwidth, saturation length, peak power and the brightness.
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| MOPC013 |
Effect of Jitter and Quadrupole Alignment Errors on SASE FEL Performance
|
94 |
| |
- V. G. Khachatryan, A. Tarloyan, V. M. Tsakanov
CANDLE, Yerevan
- W. Decking
DESY, Hamburg
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Numerical simulations of the radiation process at the European XFEL project are presented. The impact of quadrupole misalignments on the saturation length and saturation power is investigated using the simulation codes SIMPLEX and GENESIS. The influence of trajectory steering in the presence of BPM misalignments on the FEL performance is analyzed. The study is performed for the SASE 1 undulator designed for 0.1nm radiation wavelength.
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| MOPC014 |
Optimization of the Focusing Lattice for European XFEL
|
97 |
| |
- V. G. Khachatryan, A. Tarloyan, V. M. Tsakanov
CANDLE, Yerevan
- W. Decking
DESY, Hamburg
- V. V. Sahakyan
YSU, Yerevan
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Detailed knowledge of the impact of the undulator section focusing lattice on the FEL performance is an important issue to ensure the stable operation of the facility with reliable tolerances. In this paper the results of numerical simulation studies for the European XFEL project are presented. The saturation length, saturation power and the spectral brightness of the SASE FEL are calculated for various focusing lattice arrangements. A focusing optics option with reduced number of FODO cells is discussed to reach the design goals with relaxed quadrupole magnet tolerances. The numerical simulations are performed using the SIMPLEX and GENESIS codes.
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| WEPC026 |
Laser – Beam Interaction and Calculation of the Sliced Bunch Radiation Spectra for the SLS FEMTO Beam Line
|
2040 |
| |
- D. K. Kalantaryan, G. A. Amatuni, V. M. Tsakanov
CANDLE, Yerevan
- P. Beaud, G. Ingold, A. Streun
PSI, Villigen
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| |
The FEMTO insertion at the Swiss Light Source (SLS) produces sub-ps X-ray pulses by modulating the electron energy in a slice of the bunch through interaction with a fs-laser. The electron energy modulation by the laser field in the wiggler magnet is studied analytically to calculate the radiation spectra from a sliced bunch. The analytical expressions for energy modulation and its envelope have been derived. The radiation spectra in the first magnet after the FEMTO insertion have been studied. The spectra of the coherent part of the radiation are determined using a Fourier transformation technique. For a Gaussian bunch the obtained results are compared with the tracking simulation study.
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| WEPC112 |
The Acceptance and Photon Beam Formation in SLS FEMTO Beamline
|
2264 |
| |
- L. M. Hovhannisyan, D. K. Kalantaryan, V. M. Tsakanov
CANDLE, Yerevan
- S. T. Hakobyan
YSU, Yerevan
- A. Streun
PSI, Villigen
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The FEMTO insertion at the Swiss Light Source (SLS) produces sub-ps X-ray pulses by modulating the electron energy in a slice of the bunch through interaction with a fs-laser. The radiation from the sliced bunch in the FEMTO undulator of the SLS storage ring has been studied. Only photons passing all apertures of the beam line arrive at the experiment. We derive the transverse phase space distribution of these photons, the radiation spectra, and the spatial and angular distribution. Transmission of the radiated photons through the FEMTO beamline is calculated using the SRW simulation code in order to evaluate the acceptance of the beamline and the photon beam phase space distribution at the experimental station.
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| THPC004 |
Chromatic and Wakefield Effects in PSI-XFEL Linac
|
2978 |
| |
- B. Grigoryan, G. A. Amatuni, V. M. Tsakanov
CANDLE, Yerevan
- R. J. Bakker, Y. Kim, M. Pedrozzi, J.-Y. Raguin
PSI, Villigen
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Detailed knowledge about the wakefield and chromatic effects on electron beam emittance is an important issue to preserve the natural emittance of the beam in linear accelerators for FEL. The study of these two effects for beam and accelerator components imperfections in PSI-XFEL S-Band linear accelerator is presented. Emittance dilution caused by the beam coherent oscillations, accelerating section and quadrupole misalignments is analysed. The residual chromatic emittance dilution of the corrected trajectory is evaluated.
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