Saturation of the laser-induced narrowband coherent synchrotron radiation process: Experimental observation at a storage ring

Saturation of the laser-induced narrowband coherent synchrotron radiation process: Experimental observation at a storage ring

We study the efficiency limitation affecting laser-induced coherent synchrotron radiation (CSR) at high laser power. Experiments are made on the UVSOR-II storage ring in conditions of narrowband terahertz CSR emission. While, at moderate power, CSR power increases quadratically with laser power, a n...

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Bibliographic Details
Main Authors: M. Hosaka, N. Yamamoto, Y. Takashima, C. Szwaj, M. Le Parquier, C. Evain, S. Bielawski, M. Adachi, H. Zen, T. Tanikawa, S. Kimura, M. Katoh, M. Shimada, T. Takahashi
Format: Article
Language:English
Published: American Physical Society 2013-02-01
Series:Physical Review Special Topics. Accelerators and Beams
Online Access:http://doi.org/10.1103/PhysRevSTAB.16.020701
Description
Summary:We study the efficiency limitation affecting laser-induced coherent synchrotron radiation (CSR) at high laser power. Experiments are made on the UVSOR-II storage ring in conditions of narrowband terahertz CSR emission. While, at moderate power, CSR power increases quadratically with laser power, a noticeable decrease in efficiency and eventually a decrease in CSR power is observed experimentally at high power. Details of the underlying process are analyzed numerically. As the saturation effect depends almost instantaneously on the laser intensity, the saturation occurs locally in longitudinal space. This has important consequences on the modulation pattern induced on the electron bunch.
ISSN:1098-4402

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