Demonstration of SASE Suppression Through a Seeded Microbunching Instability
| Autor: | Lechnery, C., Azima, A., Drescher, M., Lazzarino, L. L., Maltezopoulos, Th, Miltchev, V., Plath, T., Rönsch-Schulenburg, J., Rossbach, J., Hacker, K. E., Khan, S., Molo, R., Ackermann, S., Bödewadt, J., Brenner, G., Dohlus, M., Ekanayake, N., Golz, T., Hass, E., Honkavaara, K., Tim Laarmann, Limberg, T., Schneidmiller, E., Stojanovic, N., Yurkov, M. |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | 36th International Free Electron Laser Conference, FEL 2014, Basel, Switzerland, 2014-08-25-2014-08-29 Scopus-Elsevier |
| Popis: | Collective effects and instabilities due to longitudinal space charge and coherent synchrotron radiation can degrade the quality of the ultra-relativistic, high-brightness electron bunches needed for the operation of free-electron lasers. In this contribution, we demonstrate the application of a laser-induced microbunching instability to selectively suppress the SASE process. A significant decrease of photon pulse energies was observed at the free-electron laser FLASH in coincidence with overlap of 800 nm laser pulses and electron bunches within a modulator located approximately 40 meters upstream of the undulators. We discuss the underlying mechanisms based on longitudinal space charge amplification [E.A. Schneidmiller and M.V. Yurkov, Phys. Rev. ST Accel. Beams 13, 110701 (2010)] and present measurements. |
| Databáze: | OpenAIRE |
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