Results of a study of a repetitively pulsed three-module electric-discharge DF laser operating on an SF6 — D2 mixture are reported. It is shown that the optimisation of the cavity Q-factor, the pressure of the working mixture, and its composition, provides a 400-W output power at a pulse repetition rate of ~ 10 Hz.

The results of detailed studies of a pulsed DF laser based on the nonchain chemical reaction between fluorine and deuterium are presented. It is shown that the electrode system in the form of knife edges makes it possible to organise a self-sustained volume discharge in a discharge gap up to 12 cm high. The dependences of the output energy on the pressure and composition of the SF6—D2 active mixture and also on the cavity Q-factor were obtained. A maximum output energy of 10.5 J and a technical efficiency of 2.2% were recorded. It is shown that the calculated model describes the experimental results satisfactorily.

The results of detailed studies of a pulsed DF laser based on the nonchain chemical reaction between fluorine and deuterium are presented. It is shown that the electrode system in the form of knife edges makes it possible to organise a self-sustained volume discharge in a discharge gap up to 12 cm high. The dependences of the output energy on the pressure and composition of the SF6-D-2 active mixture and also on the cavity Q-factor were obtained. A maximum output energy of 10.5 J and a technical efficiency of 2.2% were recorded. It is shown that the calculated model describes the experimental results satisfactorily.

The BING family of small-scale high-voltage nanosecond pulsed power generators, designed for the building of spark gap triggering systems for powerful pulsed electrophysical devices of different functional use, is described. BING generators synchronously form voltage pulses of any polarity with amplitudes of 9-70 kV and duration of 200-1000 ns. The original construction of the discharge circuit allowed voltage pulse rise-times of 6-8 ns at maximum load. Low jitter relative to triggering pulses (/spl plusmn/1 ns) allows a system with simultaneous triggering of several BING generators for performing guaranteed multichannel commutation. Design and generators operation data are presented.

A modular high-voltage device, forming in its load electric pulses with amplitudes of 100-200 kV, current 400-800 kA and duration 20 ns is described. The device is intended for the generation of Bremsstrahlung pulses. The device is made on the basis of four generators of GIIR-4/sup 1/ type. Their high accuracy of triggering allows synchronous module operation. The load of the GIIR-4 is either 42 high-voltage cables of KVI-300 type, or a transforming line with a transformation coefficient of 2. The peculiarity of the module is the simultaneous joint charging of the GIIR-4 forming lines and the HV synchronization block from one Marx generator. This allowed an increase in the reliability of device operation and repetition rates up to 20 Hz. Data on module experiments and data concerning the operation resources of the mostly electric strength device units are also presented.

The static cesium pressure has been measured for various operating conditions of a cylindrical thermionic converter. The influence of this pressure on the profile of the density current along the electrodes has been studied. The steady-state output characteristic of the converter, which is related to the static drop of the cesium pressure in the magnetic field produced by the current in the converter, has been determined. In a cylindrical converter in which the electrode switching and cesium injection are carried out at the same end of the converter, the gas pressure increases in the direction away from the switching and injection end as compared with the pressure in the evaporator. The magnitude of the pressure drop is not affected by the operating conditions of the converter being governed by the total current in the circuit. The establishment of the pressure drop involves a damped oscillatory process. (AIP)