Details

Autor(en) / Beteiligte

• Evain, C.
• Szwaj, C.
• Roussel, E.
• Rodriguez, J.
• Le Parquier, M.
• Tordeux, M.-A.
• Ribeiro, F.
• Labat, M.
• Hubert, N.
• Brubach, J.-B.
• Roy, P.
• Bielawski, S.

Titel

Stable coherent terahertz synchrotron radiation from controlled relativistic electron bunches

Ist Teil von

• Nature physics, 2019-07, Vol.15 (7), p.635-639

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Relativistic electron bunches used in synchrotron light sources are complex media, in which patterns might form spontaneously. These spatial structures were studied over the past decades for very practical reasons. The patterns, which spontaneously appear during an instability, increase the terahertz radiation power by factors exceeding 10,0001,2. However, their irregularity1–7 largely prevented applications of this powerful source. Here we show that principles from chaos control theory8–10 allow us to generate regular spatio-temporal patterns, stabilizing the emitted terahertz power. Regular unstable solutions are expected to coexist with the undesired irregular solutions, and may thus be controllable using feedback control. We demonstrate the stabilization of such regular solutions in the Synchrotron SOLEIL storage ring. Operation of these controlled unstable solutions enables new designs of high-charge and stable synchrotron radiation sources.A feedback loop based on chaos control theory permits the generation of stable and coherent terahertz radiation from relativistic electron bunches in synchrotron light sources.