S. V. Vasiliev, A. S. Kasaev, D. E. Berkaev, V. V. Balakin XII International scientific workshop on problems of charged particle accelerators in memory of professor V. P. Sarantsev Alushta, 3-8 September 2017 Development kicker feeding high voltage squared pulses generator based on SOS-diodes for Injection Complex VEPP-5 S. V. Vasiliev, A. S. Kasaev, D. E. Berkaev, V. V. Balakin Budker Institute of Nuclear Physics Russian Federation, 630 090, Novosibirsk, Lavrentev ave. 11

Injection Complex (IC) VEPP-5 2 \ 12

Injection\Extraction system of the IC VEPP-5 3 \ 12

Kickers of the IC VEPP-5 Plate length: 110 cm Wave resistance of each plate: 50 Ohm Working aperture: horizontal - 3.0 cm; vertical - 2.4 cm Kick direction: radial Plate feeding scheme: paraphase Field nonuniformity in working aperture ≤ ± 10 % Kick rise/fall time ≤ 80 ns Kick instability ≤ ± 1 % Injection frequency 50 Hz Extraction frequency < 2 Hz Voltage on the kicker plates: ± 43 kV 4 \ 12

Scheme of the power pulse kicker’s supply Energy storage - 2 double pulse forming network Switches - tyratrones TGI1-2500\50 Quasi-traveling wave mode 5 \ 12

Main disadvantages Tyratrones: Difficult to access Expensiveness Short life time Time rise and time fall of the pulses reach the turns period of the beam in the ring, which is 92 ns 6 \ 12

Modernization’s direction of the Injection\Extraction system of the IC VEPP-5 The realization of a full-turnover extraction’s mode of a storaged beam Liquidation of the generator’s scheme disadvantages 7 \ 12

Operational principle of a SOS-diode tp = 50 ns Jmax = 10 kA\sm2 Umax = 1 MV 8 \ 12

Kicker feeding high voltage squared pulses generator based on SOS-diodes 9 \ 12

Results of the simulation t+ = 388 ns t- = 135 ns Icmax = -4 kA Uload_max = 50 kV tp = 89.4 ns 10 \ 12

High-voltage generator for inflectors of the Nestor t+ = 480 ns t- = 200 ns Uload_max = 20-55 kV tp = 50 ns t1-9 = 20 ns Tyratrones – TPI1-1k35 11 \ 12

Summary In the process of this work was carried out: simulation generator of high-voltage squared pulses of nanosecond duration, based on the use of a transmission lines as an intermediate inductive energy storage and an SOS-diode as a current breaker; development kicker feeding high voltage squared pulses generator based on SOS-diodes for Injection Complex VEPP-5; the assembly of the generator was started 12 \ 12

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