• K.M.Gorchakov, Yu.A.Evtouchenko, V.R.Kozak, A.S.Medvedko, S.P.Petrov, R.Z.Pronik, O.A.Proskurina, V.P.Prosvetov, S.S.Vasichev, V.F.Veremeenko
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

Two power supply systems for bending magnets of the buster ring BEP and for the collider VEPP-2000 are described. The power supply for bending magnets of buster ring BEP has reversible current polarity with maximal current up to 10kA and maximal voltage up to 340V. Current instability is better than 50ppm. System is designed like a combination of eight thyristor rectifier modules and their passive filters joined in parallel to organize twelve ; pulse rectifier. System is equipped with the 10kA thyristor bridge to reverse the current polarity. The power supply for the collider VEPP-2000 consists of two thyristor rectifier modules and their passive filters joined in parallel. This power supply has unidirectional output current of up to 10kA with maximal output voltage 120V. Current instability is better than 10ppm. Precise DAC and ADC modules for control and measurements are essential parts of the systems. Parameters, interesting schematics and tests results should be presented.

91

• O.V.Belikov, D.E.Berkaev, V.R.Kozak, A.S.Medvedko
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

A magnet system of Electron-positron collider VEPP-2000 include about 180 elements of field correction. It includes more that 80s correctors for the BEP-buster ring, about 70 for collider VEPP-2000 and about 30 for transportation channels. Powering of the correctors were realized by bipolar DC current sources PA-6 and PA-20, with output current 6A for PA-6 and 20A for PA-20. The current ripple do not exceed 0,1%. An output voltage 120V for PA-6 and 80V for PA-20. A structure of correction unit and amplifying module is described.

94

• V.M.Veremeenko, R.V.Voskoboynikov, A.D.Goncharov, Yu.A.Evtushenko, V.V.Kolmogorov, M.N.Kondaurov, G.S.Kraynov, A.M.Kryuchkov, A.S.Medvedko, V.V.Parkhomchuk, S.P.Petrov, V.B.Reva, M.A.Tiunov, B.R.Karymov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

High voltage power supplies, developed for feeding the electron coolers EC-35 and EC-300, are described in this report. Stabilized voltage power supplies with output voltages 35 kV and 300 kV with the current up to 5mA and stability up to 10-5 are used for electron cooling of heavy ion beam. Under high potential of these power supplies there are many auxiliary power supplies, feeding the gun, control electrode, suppressor and control electronics. In this report the original decisions underlying in development of power supplies are considered. The electron coolers were developed under the contract between Budker Institute of Nuclear Physics (Novosibirsk, Russia) and Institute of Modern Physics (Lanzhou, China)

97

• G.V.Karpov, A.S.Medvedko, E.I.Shubin
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

A series of precise magnetometers on base of pulsed Nuclear Magnetic Resonance (NMR) techniques has been developed in BINP. In the range of 0.025÷13 T error of homogeneous magnetic fields measurements not exceeds (1÷2) ppm, resolution is better than 0.1 ppm. The magnetometers provide automatic search of NMR signal and tracking of the magnetic field. One type of the magnetometers is able to work with aluminum or copper powder as working substances of NMR probes. These probes can be used for measurements of magnetic fields at liquid helium temperature. A special NMR probe with very small sensitive volume (about 1 mm3) has been designed to measure of fields with the gradient up to 150 G/cm. At present NMR magnetometers developed and fabricated in BINP work successfully in some scientific centers in Russia and abroad. The features of the magnetometer's electronics design and more interesting examples of magnetometer's application in charged particle storage rings are presented.

58

• G.V.Serdobintsev, O.V.Anchugov, K.N.Chernov, I.N.Churkin, A.V.Filiptchenko, A.S.Medvedko, G.N.Ostreiko, S.I.Ruvinsky, S.V.Sinjatkin, A.G.Steshov, S.V.Tararyshkin, V.A.Ushakov, V.D.Yudin
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

• I.Yu.Boiko, N.N.Grachev, V.P.Khramtsov, N.V.Spinko
  Lukin State Research Institute for Problems in Physics, Zelenograd, Russia

• A.M.Dolgov, O.E.Kildisheva
  RIPR, St. Peterburg, Russia

• V.N.Korchuganov, Yu.V.Krylov, D.G.Odintsov, A.G.Valentinov, Yu.L.Yupinov
  Kurchatov Institute, Moscow, Russia

TNK facility (F.V. Lukin Institute, Zelenograd) was designed and manufactured at Budker INP. It includes 80 MeV electron linear accelerator-injector and two electron storage rings: the main ring for energy of 2.5 GeV and booster ring for energy of 450 MeV. The paper presents the functional layout of the linear accelerator. The disk-and-washer 2.8 GHz accelerating structure is described. Results of the accelerator startup is presented. In December 2005, accelerated electron current of ~50 mA with energy of ~50-60 MeV was obtained; the beam was captured into the booster ring.

194

• 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

• 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.P.Cherepanov, E.N.Dementev, A.S.Medvedko, V.V.Smaluk, D.P.Sukhanov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The fast head-tail and coupled-bunch instabilities are the reasons of the increased beam emittance, energy spread and of the operating current limitations and beam loss. For suppression of any excited transverse mode of the beam oscillation the wide-band bunch-by-bunch digital feedback system have been developed and installed on the VEPP-4M storage ring. A description of the system parameters and architectures, of the available diagnostic tools and of the experimental results is given.

238

• E.A.Bekhtenev, E.N.Dementev, S.M.Gurov, G.V.Karpov, P.V.Logatchev,A.S.Medvedko
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

A new beam position measurement (BPM) system has been designed, manufactured and tested in VEPP-5 preinjector. This system measures position of single electron and positron bunches for each injection cycle with help of stripline pickups. New BPM electronics provides more high sensitivity with respect to existing one developed in 1998. The system can measure the position of bunches with 10⁸ particles per bunch. The whole dynamic range is from 10⁸ to 5*10¹⁰ particles per bunch. The resolution of measurements of single bunch is better than 20 microns for 10¹⁰ particles per bunch. The features of system design, the main parameters and results obtained in VEPP-5 preinjector are presented.

250

• I.A.Gusev, A.S.Medvedko, A.Yu.Protopopov, D.N.Pureskin, D.V.Senkov, Yu.F.Tokarev, V.D.Yudin
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The presented report contains the description of a high-voltage source with output voltage up to 60 kV with power up to 15 kW. The source consist of the converter whit IGBT switches, working with a principle of pulse-width modulation on 20 kHz frequency, and high voltage sectioned transformer with the rectifier. The schematic configuration and the optimal matching of the rectifier to the load has allowed minimizing the energy stored at the reactive components of the high-voltage stage at the level less than 15 J for 60 kV operation. The design of the high-voltage transformer provides preservation of working capacity at voltage up to 100 kV. A nominal output voltage of the source is 60 kV. The efficiency of system is more than 80% at the nominally output power. The controller of the source is developed with DSP and PLM, which allows optimizing operations of the source. For control of the source serial CAN-interface is used. The description of the source and the test results are presented.

301