Explosively pumped flux compression generator

Krzysztof Szałkowski

EMP generators:

Vircator - Virtual Cathode Oscillator FCG - Explosively pumped Flux Compression

Generator), three generations:

1. MK-1,1951 Hollow tube generators

2. MK-2,1952 Helical generators

3. DEMG, Disc generators

2/12

Flux compression:

3/12

An external magnetic field (blue lines) threads a closed ring made of a perfect conductor (with zero resistance).

The variation of the magnetic flux induces a current in the ring (red arrows), which in turn creates a new magnetic field, so that the total flux in the interior of the ring is maintained (four green field lines added to the five blue lines give the original nine field lines).

By adding together the external magnetic field and the induced field, the final configuration after compression can be obtained

Marx generator

4/12

Best way to achieve high voltages in FCG is using Marx generators.

A number of capacitors are charged in parallel to a given voltage, V, and then connected in series by spark gap switches, ideally producing a voltage of V multiplied by the number, n, of capacitors

Hollow tube generator

5/12

Helical generator

6/12

Fazy generowania

HEMP

Disc generator DEMG :

7/12

Use of FCG:

8/12

Probable scheme of bomb used during attack on Irak. Cryptonime Mk.84

New ideas

9/12

MAGO scheme with gas ponderomotore unit1 – Fast helical EMG;2 – Liner for plasma compression;3 – Current pulse forming block;4 – Gas ponderomotore unit;5 – Preliminary preheated magnetized plasma;6 - High power disc EMG

MAGO project

Helical EMG for MAGO-chamber feeding:1 – EMG2 – FOS3 – Plasma chamber

Thank you

10/12