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Amplified Emission of a Soft-X Ray Free-Electron Laser Based on Echo-Enabled Harmonic Generation |
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- E. Allaria, L. Badano, G. De Ninno, S. Di Mitri, B. Diviacco, W.M. Fawley, N.S. Mirian, G. Penco, P. Rebernik Ribič, S. Spampinati, C. Spezzani, M. Trovò
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
- G. De Ninno
University of Nova Gorica, Nova Gorica, Slovenia
- E. Ferrari, E. Prat
PSI, Villigen PSI, Switzerland
- D. Garzella
CEA, Gif-sur-Yvette, France
- V. Grattoni
DESY, Hamburg, Germany
- E. Hemsing
SLAC, Menlo Park, California, USA
- M.A. Pop
MAX IV Laboratory, Lund University, Lund, Sweden
- E. Roussel
PhLAM/CERLA, Villeneuve d’Ascq, France
- D. Xiang
Shanghai Jiao Tong University, Shanghai, People’s Republic of China
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We report the first evidence of substantial gain in a soft-X ray Free Electron Laser (FEL) based on Echo-Enabled Harmonic Generation (EEHG). The experiment was focused on harmonics 36 (~7.3nm) and 45 (5.8 nm) and clearly demonstrated the expected EEHG capability of generating powerful and coherent FEL pulses, with strongly reduced sensitivity to electron-beam fluctuations. The experiment was carried out at FERMI, the seeded FEL user facility at Elettra-Sincrotrone Trieste.
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Slides WEXXPLM1 [11.410 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-WEXXPLM1
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| About • |
paper received ※ 17 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019 |
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WEXXPLM2 |
Slippage Boosted Spectral Cleaning in a Seeded Free-Electron Laser |
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- C. Feng
SARI-CAS, Pudong, Shanghai, People’s Republic of China
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The realization of fully coherent X-ray radiation pulse has been a long-standing challenge for free-electron lasers. A promising way for producing stable transform-limited pulses is based on the harmonic up-conversion techniques with a conventional laser as the seed. However, it is found that the insignificant phase error in the seed laser will be eventually multiplied by the harmonic number, leading to a degradation of the output temporal coherence at short wavelength. Here, we report the demonstration of a slippage boosted spectral cleaning technique to mitigate the impact of seed laser induced phase errors and to improve the temporal coherence of a seeded FEL. Experimental results show that fully coherent radiation pulses can be generated in a seeded FEL with the help of the proposed technique.
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Slides WEXXPLM2 [4.915 MB]
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WEXXPLM3 |
Photocathodes Research Activities for High Brigtheness Beams, Spin Polarized Sources and Large Area Photon Detectors at Cornell University |
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- L. Cultrera, J. Bae, I.V. Bazarov, C.J.R. Duncan, A. Galdi, F. Ikponmwen, W.H. Li, J.M. Maxsonpresenter, C.M. Pierce
Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
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Funding: NSF award no. PHY-1549132, DOE awards no. DE-SC0011643 and DE-SC0019122
We will a give broad description of recent results from Cornell University on improving the state of the art in the production of high brightness photoemitted electron beams for future light sources and ultrafast electron scattering. We will also discuss recent results on improving the lifetime of photocathode for spin polarized electron beam and on the production of large area photocathodes for single photon detection applications
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Slides WEXXPLM3 [7.384 MB]
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