| Paper |
Title |
Page |
| MOPPH040 |
Transverse Coherence Properties of the LCLS X-Ray Beam
|
126 |
| |
- S. Reiche
UCLA, Los Angeles, California
- H.-D. Nuhn
SLAC, Menlo Park, California
|
|
| |
Self-amplifying spontaneous radiation free-electron lasers, such as the LCLS or the European XFEL, rely on the incoherent, spontaneous radiation as the seed for the amplifying process. Though this method overcomes the need for an external seed source one drawback is the incoherence of the effective seed signal. The FEL process allows for a natural growth of the coherence because the radiation phase information is spread out within the bunch due to slippage and diffraction of the radiation field. However, at short wavelengths this spreading is not sufficient to achieve complete coherence. In this presentation we report on the results of numerical simulations of the LCLS X-ray FEL. From the obtained radiation field distribution the coherence properties are extracted to help to characterize the FEL as a light source.
|
|
| TUPPH052 |
Future FEL Studies at the VISA Experiment in the SASE and Seeded Modes
|
443 |
| |
- G. Andonian, M. P. Dunning, A. Y. Murokh, C. Pellegrini, S. Reiche, J. B. Rosenzweig
UCLA, Los Angeles, California
- M. Babzien, I. Ben-Zvi, V. Yakimenko
BNL, Upton, Long Island, New York
|
|
| |
The VISA (Visible to Infrared SASE Amplifier) experiment at BNL (Brookhaven National Laboratory) has previously demonstrated saturation at 840 nm in 2001. Further SASE studies, in 2003, have demonstrated an anomalously large bandwidth spread of the FEL spectrum due to off-angle emissions. This paper disseminates the current and future program of the VISA program at BNL. This includes a study of a seeded FEL, using a 1 micron YAG laser as a seed, and the accompanying diagnostics to characterize the radiation. Diagnostics include the double differential spectrometer, a mode converter to investigate the orbital angular momentum of light in the FEL, and an optical pepper-pot for coherence measurements. As usual, start-to-end simulations are presented.
|
|
| TUPPH053 |
Magnetic Chicane Radiation Studies at the BNL ATF
|
447 |
| |
- M. P. Dunning, G. Andonian, A. M. Cook, E. Hemsing, A. Y. Murokh, S. Reiche, J. B. Rosenzweig, D. Schiller
UCLA, Los Angeles, California
- M. Babzien, K. Kusche, V. Yakimenko
BNL, Upton, Long Island, New York
|
|
| |
Coherent edge radiation, emitted from the edges of chicane dipole magnets, has recently been observed at the Accelerator Test Facility at Brookhaven National Laboratory. Using the 60 MeV linac, a series of experiments has been performed to characterize the radiation, including measurements of the spectrum, angular distribution, and polarization. Details and results of the experiments and plans for future experiments are presented.
|
|