[en] Different mode regimes vs. extent of stabilization of modulation instability were investigated with a complex diagnostics system. Slippage due to detuning of the frequencies of electron and light pulses turned out to be the main stabilization factor. Spectral and time parameters of the laser, especially radiation of high harmonics, have been shown to strongly depend on the stabilization.

[en] A high-power infrared free electron laser is under construction in Novosibirsk. As the full-scale machine seems to be complicated and quite expensive, the project was divided into two stages so that the first-stage machine can be assembled and commissioned as soon as possible. Main features of the project and the current status are described

[en] Original investigations of ablation of minerals, fullerene-like compounds, polymers and complicated biological macromolecules under the action of submillimeter radiation of the free-electron laser (FEL) developed and built at Budker Institute of Nuclear Physics [V.P. Bolotin et al., First experiments on high-power Novosibirsk terahertz free-electron laser, Budker INP, 2005, p. 37 < http://www.inp.nsk.su/publications>[1]] were carried out at the Chemical and Biological Station of the Siberian Center for Photochemical Research. It was shown that ablation might be nondestructive

[en] The first lasing near wavelength 140 μm 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

[en] Two imaging techniques based on the thermal effect have been developed and implemented for recording images using radiation of a high-power terahertz free electron laser. The techniques were applied for the visualization of images in experiments on classical optics, as well as in a holographic experiment

[en] The first stage of Novosibirsk high-power free electron laser (FEL) was commissioned in 2003. It is based on the normal conducting CW energy recovery linac (ERL). Now the FEL provides electromagnetic radiation in the wavelength range 120-230 μm. The maximum average power is 400 W. The minimum measured linewidth is 0.3%, which is close to the Fourier-transform limit. Four user stations are in operation now. Manufacturing of the second stage of the FEL (based on the four-turn ERL) is in progress

[en] The Novosibirsk terahertz free electron laser is based on the energy recovery linac (ERL) with room-temperature radiofrequency system. Some features of the ERL are discussed. The results of emittance measurements and electron optics tests are presented. The second stage of the ERL, which has four orbits, is described briefly