| Title |
New Scenarios of Microbunching Instability Control in Electron Linacs and Free Electron Lasers |
| Authors |
- E. Roussel, E. Allaria, M.B. Danailov, S. Di Mitri, E. Ferrari, D. Gauthier, L. Giannessi, G. Penco, M. Veronese
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
|
| Abstract |
Laser-heater systems are essential tools to control and optimize high-gain free-electron lasers (FELs) working in the x-ray wavelength range. Indeed, these systems induce a controllable increase of the energy spread of the electron bunch. The heating suppresses longitudinal microbunching instability which otherwise would limit the FEL performance. We demonstrate that, through the action of the microbunching instability, a long-wavelength modulation of the electron beam induced by the laser heater at low energy can persist until the beam entrance into the undulators. This coherent longitudinal modulation is exploited to control the FEL spectral properties, in particular, multicolor extreme-ultraviolet FEL pulses can be generated through a frequency mixing of the modulations produced by the laser heater and the seed laser in the electron beam. We present an experimental demonstration of this novel configuration carried out at the FERMI FEL.
|
| Footnotes & References |
*E. Roussel et al., Phys. Rev. Lett. 115, 214801 (2015) |
| Paper |
download THYA1.PDF [1.190 MB / 3 pages] |
| Slides |
download THYA1_TALK.PDF [14.837 MB] |
| Export |
download ※ BibTeX
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※ EndNote |
| Conference |
IPAC2017, Copenhagen, Denmark |
| Series |
International Particle Accelerator Conference (8th) |
| Proceedings |
Link to full IPAC2017 Proccedings |
| Session |
Invited Oral Presentations, Beam Dynamics and Electromagnetic Fields |
| Date |
18-May-17 11:00–11:30 |
| Main Classification |
05 Beam Dynamics and Electromagnetic Fields |
| Sub Classification |
D06 Coherent and Incoherent Instabilities - Measurements and Countermeasures |
| Keywords |
FEL, electron, laser, linac, controls |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Volker RW Schaa (GSI, Darmstadt, Germany); Gianluigi Arduini (CERN, Geneva, Switzerland); Juliana Pranke (ESS, Lund, Sweden); Mike Seidel (PSI, Villigen, Switzerland); Mats Lindroos (ESS, Lund, Sweden) |
| ISBN |
978-3-95450-182-3 |
| Published |
May 2017 |
| Copyright |
|
