• N.A.Vinokurov, D.A.Kayran, B.A.Knyazev, E.I.Kolobanov, V.V.Kotenkov, V.V.Kubarev, G.N.Kulipanov, A.V.Kuzmin, A.S.Lakhtychkin, A.N.Matveenko, L.E.Medvedev, S.V.Miginsky, L.A.Mironenko, A.D.Oreshkov, V.K.Ovchar, V.M.Popik, T.V.Salikova, S.S.Serednyakov, A.N.Skrinsky, O.A.Shevchenko, M.A.Scheglov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

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 micron. The maximum average power is 400 W. The minimum measured line width 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.

• E.N.Dementyev, V.R.Kozak, E.A.Kuper, A.S.Medvedko, A.D.Oreshkov, A.V.Ovchar, T.V.Salikova, P.A.Selivanov, S.S.Serednyakov, E.N.Shubin, S.V.Tararyshkin, N.A.Vinokurov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

In this article the architecture of control system of Free Electron Laser for the Siberian Center for photochemical research is presented. The basic structure of whole control system and the basic hardware components of individual subsystems are described. Also the hardware interfaces and main types of control devises, used for connection and control are shortly described. The main features of each subsystem and of whole control system are enumerated. Also the main features of control software are described.

209

• E.I.Kolobanov, A.N.Matveenko, T.V.Salikova, S.S.Serednyakov, O.A.Shevchenko, N.A.Vinokurov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

12 MeV energy recovery non-superconducting linac of the Novosibirsk terahertz FEL is put into operation in 2003. The efficiency of energy recovery was studied. The transversal and longitudinal beam halo was investigated by studying the dependence of the beam dump current on steering corrector strength and RF system parameters. Ways to increase energy recovery efficiency are discussed.

322

• P.A.Golubev, V.E.Karlin, E.I.Kolobanov, S.A.Krutihin, G.Ya.Kurkin, V.K.Ovchar, S.S.Serednyakov, S.V.Tararyshkin, N.A.Vinokurov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The device for forming pulsed electron current for injection into accelerators was designed and realized. The pulse current duration is 0.5 ns and average electron current is from zero up to 110 mA. The charge of electron pulse is variable from zero up to 1.5 nC.

384