• P.V.Logachev, A.V.Akimov, A.V.Antoshin, P.A.Bak, Yu.M.Boimelshtain, D.Yu.Bolkhovitianov, R.Galimov, S.M.Gurov, E.A.Gusev, N.S.Dikansky, S.N.Klushev, N.Kh.Kot, A.A.Korepanov, I.L.Pivivarov, Yu.I.Semenov, A.N.Skrinsky, A.R.Frolov, A.S.Tsyganov, S.V.Shiyankov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The present status of VEPP-5 Injection Complex is presented. The results of VEPP-5 positron source operation are discussed.

19

• A.V.Akimov, P.A.Bak, I.V.Kazarezov, A.A.Korepanov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

For the 10 MeV 2 kA electron inductive accelerator pulse power supply the modulator prototype operating in two-pulse regime has been developed. The modulator is used for the resistively-inductive load supplying with the pulse voltage 20 kV, current up to 10 kA, 300 ns pulse duration. The data obtained at the nominal modulator operation regime are presented. The basic technical developments of the modulator parts and the modulator design are described.

284

• A.A.Pachkov, P.A.Bak
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

10 kW power supply (PS) with smooth adjustment of a load current from zero up to 2 кА is described. Depending on the load requirements operating modes with stability of a load current from 5% to 0.1% and long-term instability of 0.01% are possible. Power mains isolation is up to 35 kV. PS includes the high-frequency inverter, transformer-rectifier module and the control block. The high-frequency inverter is performed on progressive ZCZVS-PS-FB (Zero Cur-rent Zero Voltage Switching - Phase Shifted - Full Bridge) topology. It provides a full range load regulation with the minimal power losses. Dynamic losses of the inverter switching do not exceed 6%. The step-down transformer secondary winding has the form of a solid turn that allows to receive low leakage inductance and high working frequency. Rectifier block is based on the current symmetric doubler circuit. Total power losses of the transformer-rectifier module is about 15%. Thus, the high-frequency conversion and doubling of a load current allow to reach high power and low weight parameters of the device. The power supply control circuit is realized on an CPLD base by "ALTERA" firm. The intellectual algorithm of inverter management provides soft switching in a full range of load variations and precision stabilization of a load current. The remote control is carried out through the CAN-interface. Oscillograms of a power supply operating modes are presented, the received results are discussed.

304