A. A. Kondakov

Commissioning of the accelerator-recuperator for the FEL at the Siberian Center for Photochemical Research.

A 100 MeV eight-turn accelerator-recuperator intended to drive a high-power infrared free-electron laser (FEL) is currently under construction in Novosibirsk. The first stage of the machine includes a one-turn accelerator-recuperator that contains a full-scale RF system. It was commissioned successfully in June 2002.

Status of the free electron laser for the Siberian centre for photochemical research

Abstract 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.

CW 100 mA Electron RF Gun for Novosibirsk ERL FEL

Measured rf gun characteristics Average beam current, mA ≤100 Cavity Frequency, MHz 90 Bunch energy, keV 100 ÷ 400 Bunch duration (FWHM), ns 0.06 ÷ 0.6 Bunch emittance, mm mrad 10 Bunch charge, nC 0.3 ÷ 1.12 Repetition frequency, MHz 0.01 ÷ 90 Dark Current Impurity, mkA 0 Radiation Dose Power, mR/h 100/2m Operating pressure , Torr ~10-9-10-7 Cavity rf loses, kW 20 The most powerful in the world Novosibirsk CW FEL driven by ERL can be more powerful by an order of magnitude with this RF Gun

Novosibirsk Free Electron Laser: Terahertz and Infrared Coherent Radiation Source

High-power free electron laser (FEL) facility NovoFEL has been created at Budker INP. Its wavelength can be tuned over a wide range in terahertz and infrared spectrum regions. As a source of electron bunches this FEL uses multi-turn energy recovery linac which has five straight sections. Three sections are used for three FELs which operate in different wavelength ranges (the first one 90-240 microns, the second 37-80 microns and the third 5-20 microns). The first and the second FELs were commissioned in 2003 and 2009 respectively. They operate for users now. The third FEL is installed on forth accelerator track which is the last one and electron energy is maximal here. It comprises three undulator sections and 40 m optical cavity. The first lasing of this FEL was obtained in summer, 2015. The radiation wavelength was 9 microns and average power was about 100 watts. The designed power is 1 kilowatt at repetition rate 3.75 MHz. Radiation of third FEL has been delivered to user stations recently. The third FEL commissioning results as well as current status of the first and second FELs and future development prospects are presented. OVERVIEW OF THE NOVOSIBIRSK FEL

Novosibirsk high-power THz FEL facility

Novosibirsk free electron laser (FEL) facility contains three FELs operating in the wavelength range 8-240 micron at average power up to 0.5 kW and peak power about 1 MW. Radiation users works at 6 user stations performing biological, chemical, physical and medical research.