| Paper |
Title |
Page |
| MOAAU05 |
The First Lasing of 193 nm SASE, 4th Harmonic HGHG and ESASE at the NSLS SDL
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18 |
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- X. J. Wang, J. B. Murphy, J. Rose, Y. Shen, T. Tsang, T. Watanabe
BNL, Upton, Long Island, New York
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After successfully achieving SASE lasing at 198 nm on April 20, 2006, we have also observed the first 4th harmonic High Gain Harmonic Generation (HGHG) with a 795 nm seed laser. We will report the progress and experimental characterization of the 198 nm SASE and 4th harmonic HGHG.
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Slides
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Talk
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| MOPPH065 |
The First Experimental Observation of FEL Amplifier Efficiency Improvement using Electron Beam Energy Detuning at the NSLS SDL
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190 |
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- T. Watanabe, J. B. Murphy, J. Rose, Y. Shen, T. Tsang, X. J. Wang
BNL, Upton, Long Island, New York
- H. Freund
SAIC, McLean
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We report on the first observation of efficiency enhancement in a single-pass laser seeded FEL amplifier by detuning electron beam energy away from resonance. The dependence of the output FEL energy on the electron energy was measured; a maximum and average enhancement of 100 % and 70 % were observed. The spectral output of the seeded FEL both with and without an energy detuning was also measured. It was verified that the peak wavelength was dominated by the seed laser. The experimental results are compared with the analytical theory and the numerical simulation code, GENESIS 1.3.
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| MOPPH066 |
Chirped Pulse Amplification Experiment at 800 nm
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194 |
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- L.-H. Yu, D. F.L. Liu, J. Rose, T. V. Shaftan, T. Tsang, X. J. Wang, T. Watanabe
BNL, Upton, Long Island, New York
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We report the chirped pulse amplification (CPA) experiment carried out using 800 nm direct seed and NISUS undulator as free electron laser amplifier at SDL of BNL. The experiment indicated that due to saturation in the center part of the chirped electron bunch the output pulse shape has a dip in the middle, as result the edge of the bunch has higher power than the center. Hence the output spectrum also showed a dip in the center, resulting a larger FWHM bandwidth than the seed. An interesting result is that the output of the 800 nm chirped FEL pulse was compressed and generated a pulse length shorter than what the seed itself can be compressed to.
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