EXPERIMENTAL STUDY OF EM RADIATION FROM THE FASTER- THAN-LIGHT VACUUM MACROSCOPIC SOURCE A. V. Bessarab, S.P. Martynenko, N.A. Prudkoi, A.V. Soldatov*,

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EXPERIMENTAL STUDY OF EM RADIATION FROM THE FASTER- THAN-LIGHT VACUUM MACROSCOPIC SOURCE A. V. Bessarab, S.P. Martynenko, N.A. Prudkoi, A.V. Soldatov*, V.A. Terekhin

Schemes of EMP generation

Experimental setup for EMP research on “Iskra-5” laser facility

Experimental set-up

X-rays parameters

Radiating unit design (plane diode)

Faraday cup

Anode electron current vs emission current Faradey cup Laser Plasma X-ray Sourse X-ray Plastic’s Shield (Protect part of capacitor’s area from X-ray irradiation) 1E cathode (emission) current Is, arb.un. current density, A/cm E capac =40 kV/cm I CL =13.2 A/cm 2 E capac =53 kV/cm I CL =23.5 A/cm 2 Nonlinear mode opened cathod protected cathod Linear mode

Anode electron current vs emission current (cont.)

Anode current Comparison of Experimental & Theoretical Results

The spectrum of electrons, accelerated in a gap of the capacitor. Measurement was executed with the help of electron spectrometer that operates according to a principle of 180  deviation of electrons in a constant magnetic field

EM sensors

Radiation zones diagram 1-chamber walls, 2- X-ray source, 3 - X-ray source mirror image, 4 – diode, 5 – edge rays, 6 – wave zone boundary, 7 – laser axis

Time shape of magnetic field for different direction

Time shape of magnetic field for different target location

The time dependence of the magnetic field H Y (MS 3 direction) for the different diode voltage U The dependence of the magnetic field amplitude H Y (MS 3 direction) for the different diode voltage U

Comparison of Experimental & Theoretical Results

Conclusions EMP from faster-than-light source was studied experimentally Direct-like EM radiation pattern was found EM pulse with ~ 100 kV/m amplitude and ~ 250 ps rise- time at distance of 3 m from source was detected (diode voltage is 80 kV) EMP amplitude dependence on diode voltage is stronger than linear Diode current decreasing due to diode electromagnetic insulation was proved experimentally