The results of the development and experience of operation of a modernized charging system of the capacitor bank of the Iskra-5 laser facility are presented. The main performance characteristics of the devices that are included in the charging system are presented. A method for creating the hardware and software for the remote control and monitoring of the parameters of charging devices is described. The serviceability of the charging system during the operation of the facility is evaluated.

Amplifiers based on neodymium phosphate glass rods 60 - 100 mm in diameter are experimentally studied. The amplifiers are pumped by INP-16/250 tubular flash lamps placed in a universal pump cavity with a two-section mirror reflector. A compact high-voltage capacitive energy storage with a preionisation circuit was developed to supply the lamps.

A pulse magnetic-field generator producing pulse amplitudes up to 50 T with base durations of unities of milliseconds is described. The pulse magnetic field is obtained during discharging a capacitive storage through a thyristor-diode switch into a nitrogen-cooled solenoid. The repetition of the pulse amplitude of the current in the solenoid is ensured with an accuracy up to tenth of shares of a percent by stabilizing the precharge voltage of the storage and thermally stabling the solenoid. Using this generator, experiments for obtaining terahertz kilowatt-power radiation from 0.9- to 1.3-THz frequencies were successfully performed.

Описан генератор импульсного магнитного поля амплитудой до 50 Тл с длительностью импульса по основанию единицы миллисекунд, получаемого при разряде емкостного накопителя энергии через тиристорно-диодный коммутатор на соленоид с азотным охлаждением. Повторяемость амплитуды импульса тока соленоида с точностью до десятых долей процента обеспечивается за счет стабилизации предразрядного напряжения накопителя и термостабилизации соленоида. С помощью генератора успешно проведены эксперименты по получению терагерцового излучения киловаттного уровня мощности на частотах от 0.9 до 1.3 ТГц.

Chargers of capacitive energy storages of electrophysical installations based on transistor-capacitor voltage converters are considered. Based on the developed procedure, electromagnetic and thermal processes in devices of this type are simulated. The results of investigations are used in the development of two chargers of capacitive energy storages of the megajoule range.

Second harmonic 24-28 GHz CW gyrotrons and series of gyrotron based setups for material processing and Electron Cyclotron Resonance Ion Sources (ECRIS) has been developed at IAP RAS. The possibility of significant output efficiency enhancement due to energy recovery for gyrotrons operating at cyclotron harmonic is demonstrated. The efficiency of 60% at 6 kW output power level at second harmonic 24 GHz gyrotron has been obtained by magnetic field profile optimization and single-stage energy recovery of the spent electron beam. It is shown, that the energy to sintering process can be significantly reduced (1.5-2 times) by simultaneous control of gyrotron voltage and solenoid current. Different varieties of broadband frequency gyro devices - multi-frequency or fast-swept in time operation - are under investigation for ECRIS. The double-frequency CW 10 kW second harmonic gyrotron with 2% fast frequency and a frequency-tunable gyro-BWO operating at center frequency of 60 GHz with CW output power about 10 kW are presented.

Summary form only given. Since 2000 year LUCH laser facility has been worked at RFNC-VNIIEF. This facility was designed as prototype of ISKRA-6 128-beams facility that is developing now. Basis of LUCH facility is 4-beams Nd-glass laser with operating aperture 20times20 cm. This laser is included two four-path amplifiers that are pumped by 432 xenon flashlamps. The capacitor bank with near 5MJ stored energy at operating voltage of 24 kV has been constructed to drive amplifiers flashlamps. 18 unified modules are included in the bank. Each single module is discharged to lamp load by semiconductor closing switch based on reverse switched dynistors. Description of module components and bank subsystems such as charging, triggering, control and diagnostic is presented in this report. Also the bank performance during the exploitation is discussed.

Gyrotron based systems with output power from several kilowatts to several tens kilowatts are finding increasing use in the research into various applications and pilot tests of the processes of industrial interest. In the last decade, the Institute of Applied Physics jointly with Gycom Ltd., Nizhny Novgorod, Russia, in parallel with the fabrication of gyrotron systems started development of high voltage power supplies (HVPS) to be used with these systems. In this paper, the general concept of the HVPS design is described and examples of their output characteristics are given.

Summary form only given. The ISKRA-6 laser is a 128-beam, flashlamp-driven neodymium-glass laser that will produce near 0.6 MJ of light on target. Each of the 128 beams of the ISKRA-6 laser is amplified in two four-pass laser amplifiers. Pumping system of these amplifiers is consisted the 5120 xenon flash lamps that are drove by a power conditioning system. ISKRA-6 power conditioning system (PCS) is based on the capacitor storage bank to deliver approximately 35 k.F to each of 5120 flashlamps. So, PCS will be capable of storing nearly 215 MJ of electrical energy at 24 kV The capacitor bank will include the 256 unified modules. This paper describes the design of module and results of testing of module prototype. It also discusses the components of module including self-healing capacitors, main semiconductor closing switches based on reverse switched dynistors, and other components.

Summary form only given. A new generation of semiconductor closing switches based on reverse switched dynistors (RSD) has been developed to switch high-power current pulses with microsecond duration. In this report the results of theoretical and experimental investigations of RSD at peak current more than 500 kA and pulse duration up to 500 mus (at 0.1 Imax) are observed. The criteria of extreme peak current for switch taking into consideration the longtime performance under pulse-periodical mode are gave. The design and test results for switch under single pulse mode at operating voltage up to 25 kV and peak current up to 300 kA are described. The possibility of using such a switch in the ISKRA-6 capacitor bank is estimated.