| Paper |
Title |
Page |
| TUPPH052 |
Future FEL Studies at the VISA Experiment in the SASE and Seeded Modes
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443 |
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- 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
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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.
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| TUPPH053 |
Magnetic Chicane Radiation Studies at the BNL ATF
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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
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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.
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| TUPPH072 |
Generation and Characterization of the Microbunched Beams in the Range from 0.3 to 500 Femtoseconds
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481 |
| |
- V. Yakimenko, M. Babzien, K. Kusche
BNL, Upton, Long Island, New York
- E. K. Kallos, P. Muggli
UCLA, Los Angeles, California
- W. D. Kimura
STI, Washington
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The presentation will cover recent experimental results on generation and measurement of the beams with the bunch lengthes from 0.3 to 500 fs at Brookhaven Accelerator Test Facility. Double beam structure is produced at 100 fs - 0.5 ps time scale using compression in the magnetic chicane - "dog leg" arrangement. The beam structure is characterized using interferometer and 6 mm long plasma wakefield channel with the controllable plasma density. Arbitrary number of 10-100 femtosecond microbunches is sliced out of 5 ps long beam using wire mesh. CSR interferometer is used for detailed characterization of the beams. Accuracy of the bunch length measurement using CSR energy is greatly improved for the 0.3 fs bunches by spectral measurements of multiple harmonics.
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