• K.Chernov, A.Frolov, Ye.Gusev, N.Kot, S.Krutikhin, I.Kuptsov, G.Kurkin, I.Makarov, N.Matyash, L.Mironenko, S.Motygin, V.Osipov, G.Ostreiko, V.Petrov, A.Popov, E.Rotov, I.Sedlyarov, G.Serdobintsev, A.Shteinke, V.Tarnetsky, V.Volkov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

RF system for VEPP-5 booster ring has been created at Budker INP. It operates at 700 MHz and consists of the RF power source based on KU-393 klystron, waveguide section with wave-to-coax transitions, accelerating cavity, and control system. The cavity higher order modes are damped by resistive loads to eliminate the beam instability. Results of the cavity cold tests and RF system high power level tests are presented.

188

• B.Gudkov, A.Filipchenko, V.Kozak, E.Kuper, G.Kurkin, A.Medvedko, G.Serdobintsev, S.Tararyshkin, V.Ushakov,
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

• V.Korchuganov, Yu.Krylov, A.Valentinov, Yu.Yupinov
  KCSR RSC Kurchatov Institute Moscow, Russia

• N.Spinko
  LSRIPP, Zelenograd, Russia

Control system of Zelenograd Synchrotron Radiation facility, designed at the end 80-th last century, is in commission now. Old system was CAMAC based mainly. More advanced variant will consist in replacement of CAMAC modules with the embedded controllers. The report describes new hardware and software solutions.

228

• V.S.Arbuzov, Yu.A.Biryuchevsky, A.A.Bushuev, E.I.Gorniker, E.K.Kendjebulatov, A.A.Kondakov, I.A.Koop, S.A.Krutikhin, Ya.G.Kruchkov, I.V.Kuptsov, G.Ya.Kurkin, N.V.Mityanina, S.V.Motygin, V.N.Osipov, V.M.Petrov, A.M.Pilan, A.M.Popov, V.P.Prosvetov, E.A.Rotov, I.K.Sedlyarov, Yu.M.Shatunov, A.G.Tribendis, V.N.Volkov, S.V.Volobuev
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The description of storage ring VEPP-2000 RF system is given. The RF system consists of an RF generator with a tetrode GU-101A in the generator output stage and with output power of 60 kw in CW mode, an accelerating cavity with damping of the high orders modes (HOM) and accelerating voltage of 120 kV and a control system providing tuning of RF cavity and control of accelerating voltage phase and amplitude. Detailed description of operation of automatic frequency tuning system of choke-filter, which prevents a leakage of RF power of the accelerating mode to one (of two) HOM dumper, and a system of automatic frequency tuning of cavity operating mode is given. The results of RF system commissioning are given. Now the RF system is made, assembled and installed to the storage ring.

191

• V.S.Arbusov, E.I.Gorniker, S.A.Krutikhin, I.V.Kuptsov, G.Ya.Kurkin, A.M.Pilan, I.K.Sedlyarov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The status of the commissioning of the RF system of the minor storage ring for Technological SR source is discussed. This minor storage ring is designed as independent SR source and as injector for major storage ring of the Technological SR source complex. The component parts of RF control system, RF power amplifier 34.52 MHz 5kW and RF cavity are described. Initial results of measurements and tests are presented.

200

• V.S.Arbuzov, E.I.Gorniker, E.K.Kenjebulatov, A.A.Kondakov, S.A.Krutikhin, Ya.G.Kruchkov, I.V.Kuptsov, G.Ya.Kurkin, S.V.Motygin, V.N.Osipov, V.M.Petrov, A.M.Pilan, A.M.Popov, E.A.Rotov, I.K.Sedlyarov, A.G.Tribendis, V.N.Volkov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

In order to luminosity increase in VEPP-4 collider at BINP, it was acceded to increase the current in four-bunch mode (2е-2е+) from 5мА up to 30мА in each bunch. One of the problems on the way to current increase is instability associated with longitudinal bunch oscillations. A feedback system is being developed for bunch oscillations control. The feedback system consists of two identical parts, each works with separate amplifier of 100 W and deals with only one type of particles. Each part contains two channels: one for damping of inphase oscillations, another for damping of antiphase oscillations. Decrement due to the feedback system is about 3000 1/s, that exceeds the decrement due to radiating losses approximately by 180 times.

206

• N.A.Vinokurov, G.Ya.Kurkin, L.E.Medvedev, L.A.Mironenko., A.D.Oreshkov, T.V.Salikova, M.A.Scheglov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

In this article is described the vacuum system of the powerful terahertz free electron laser constructed in the Siberian Center for Photochemical Research. Vacuum system of FEL contains the new technological decisions: standby blocks - power supply of pumps; hardware and software intended for the vacuum's monitoring and ensuring the protection of some technological units of FEL in case of vacuum's downturn

287

• 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