Free Electron Lasers 2003. Proceedings of the 25th by Eisuke J. Minehara, Masaru Sawamura, Ryoichi Hajima

By Eisuke J. Minehara, Masaru Sawamura, Ryoichi Hajima

This publication comprises the complaints of the twenty fifth foreign unfastened Electron Laser convention and the tenth unfastened Electron Laser clients Workshop, that have been hung on September 8-12, 2003 in Tsukuba, Ibaraki in Japan.

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Additional info for Free Electron Lasers 2003. Proceedings of the 25th International Free Electron Laser Conference and the 10th FEL Users Workshop, Tsukuba, Ibaraki, Japan, 8–12 September 2003

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12) shows that the pulse duration cannot be made smaller than σω /ΐ4, as illustrated in the phase space geometry of Fig. 1. This limitation to the attainable pulse length is applicable to both pulse slicing and compression. Another limitation of these optical schemes is the bandwidth of optical elements. In the case of a m o n o c h r o m a t o r , an extremely narrow bandwidth will stretch the pulse due to Fourier transform limit, as expressed by the last term in Eq. (12). The optimal m o n o ­ chromator bandwidth that yields the minimum k i G) (13) ω0 The corresponding minimum rms pulse duration is OOmin (14) = In principle, for a given SASE bandwidth, one can increase the energy chirp α and hence the frequency chirp u to select a shorter pulse.

6 0 . Cr Keywords: FEL; Linear accelerators 1. Introduction The Israeli electrostatic accelerator F E L (EAF E L ) is based on a 6 M e V E N - T a n d e m Van de Graaff accelerator (shown in Fig. 1), which was originally used as an ion accelerator for nuclear * Corresponding author. il (A. Gover). physics experiments [1]. The scheme employs straight geometry for the electron beam transport, where the electron gun and the collector are installed outside the accelerator region, as illustrated in Fig.

Petrov, A . M . V. V. M. Popik, A . M . A. V. K. A. S. N. V. A. G. A. P. A. R. A. Scheglov Budker Institute of Nuclear Physics, Acad. Lavrentyev Prospect 11, 630090 Novosibirsk, Russia Abstract The first lasing near wavelength 140 μηι was achieved in April 2003 on a high-power free electron laser (FEL) constructed at the Siberian Center for Photochemical Research. In this paper, we briefly describe the design of FEL driven by an accelerator-recuperator. Characteristics of the electron beam and terahertz laser radiation, obtained at the first experiments, are also presented in the paper.

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