V. A. Stroganov

Development of accelerator for high-power microwave applications based on the forming line supplied with current

At present, explosive magnetic generators (EMG) are the most energy containing sources for pulsed power applications. The use of MCG for power supply of microwave generators significantly reduce the weight and sizes of installation as a whole. Modern fast-run MCGs are capable to transmit into load dozens or even hundreds of kJ during only a few microseconds. For matching with relatively high-resistance load, which is most of microwave generators, it is very useful to take the advantage of an intermediate inductive store with electroexplosive opening switch (EEOS).

Conversion of high explosive chemical energy into energy of powerful nanosecond high-current pulses

This study is a contribution into the development of physicotechnical foundations for generation of powerful nanosecond high-current pulses on the basis of explosively driven magnetic flux compression generators. This problem is solved by using inductive storage of energy for matching comparatively low-voltage explosively driven magnetic flux compression generators and high-impedance loads; short forming lines and vacuum diodes. Experimental data of charging of forming lines are given.

Nanosecond Megavolt Charging of Forming Lines by Explosive MCGs

A new design of powerful high-voltage high-current impulse source for nanosecond megavolt charging of short forming lines (SFLs) is proposed. The first stage of the device is based on inductive energy storage. It accumulates energy supplied by the current of magnetic flux compression generator (MCG), whereas the electro-explosive opening switch is used for the energy output into intermediate SFL. In the second stage, we use a Tesla transformer with oil insulation. The results of the earlier experimental study of submegavolt charging of intermediate forming line as well as the results of calculations of the two-stage facility given in this paper demonstrate the feasibility of the device based on MCGs for nanosecond charging of SFL up to about 3 MV.

Magnetic cummulation generators applied for rapid charging of forming lines

We describe an off-line nanosecond charging device for a short forming line; the device has been created on the basis of an inductive energy storage unit. Energy storage is carried out by the current of an explosive magnetic cumulation generator, and the energy output to the load, by means of an electroexplosive current interrupter. The use of a two-stage, instead of a one-stage, magnetic cumulation generator, consisting of a preamplifier and a dynamic transformer, and two smaller-size generators with sequential connection of secondary windings of dynamic transformers, one of which is connected to the inductive storage unit, and the other, to the current interrupter—has made it possible to substantially increase the line charge voltage. As a result, within a time on the order of 100 ns, it was possible to charge a forming line with an electric length of 5 ns to a voltage of ≥1 MV.

A multi-pulse mode of operation of a magnetocumulative generator

Experimental results of generating a nanosecond high-current pulse burst by a multiwinding dynamic transformer, which is based on the principle of recuperation of the energy stored in the single primary winding, and the method of the sequential magnetic-flux trapping by several secondary windings are described. The inductive energy storage with an opening switch is used to sharpen current pulses of the generator. Six small electric capacitors are in turn charged up to ∼300 kV for ∼100 ns with a time interval of 10 μs.

Pulsed high-voltage source based on helical MCG for power supply of high-current REB accelerators

At present, the creation of compact sources for power supply of high-current accelerators is connected with MCG usage. In spite of considerable progress in creation of capacitors with high specific characteristics, the capacitive storages are not competitive with MCG when energies of generated pulse are higher than several kJ. On the basis of the experience collected in HEDRC for a long time of design and experimental investigations of high-current REB accelerators supplied by MCG and literature analysis as well, the design of self-contained high voltage source (SCHVS) have been accomplished.