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MCNP calculations of neutron emission anisotropy caused by the GIT-12 hardware

100%

Šíla O., Klír D., Řezáč K., Cikhardtova B., Cikhardt J.

Nukleonika

2015

vol. 60

issue 2

323-326

The MCNP6 and MCNPX calculations for the GIT-12 device in Tomsk were performed to determine the influence of the gas-puff hardware on the neutron emission anisotropy and the neutron scattering rate. A monoenergetic 2.45 MeV neutron source and F1 and F6 tallies were declared in the simulation input. A comparison between MCNP results and the measured data was made. Differences between MCNPX and MCNP6 output data were investigated. In the experiment, two nTOF scintillation detectors with the Bicron BC-408 scintillator were used to measure the neutron waveform. Four bubble BD-PND detectors were used to estimate the amount of neutrons in different places around the neutron source.

Temporal distribution of linear densities of the plasma column in a plasma focus discharge

73%

Cikhardtova B., Kubeš P., Cikhardt J., Paduch M., Zielinska E., Kravárik J., Řezáč K., Kortanek J., Šíla O.

Nukleonika

2015

vol. 60

issue 2

315-318

Experiments were carried out on the PF-1000 plasma focus device, with a deuterium filling and with deuterium puffing from a gas-puff nozzle placed on the axis of the anode face. The current was reaching 2 MA. 15 interferometric frames from one shot were recorded with a Nd:YLF laser and a Mach–Zehnder interferometer, with 10–20 ns delay between the frames. As a result, the temporal and spatial distribution of the linear densities and the radial and axial velocities of the moving of plasma in the dense plasma column could be estimated.

Electromagnetic pulses produced by expanding laser-produced Au plasma

59%

De Marco M., Cikhardt J., Krása J., Velyhan A., Pfeifer M., Krouský E., Klír D., Řezáč K., Limpouch J., Margarone D., Ullschmied J.

Nukleonika

2015

vol. 60

issue 2

239-243

The interaction of an intense laser pulse with a solid target produces large number of fast free electrons. This emission gives rise to two distinct sources of the electromagnetic pulse (EMP): the pulsed return current through the holder of the target and the outflow of electrons into the vacuum. A relation between the characteristics of laser-produced plasma, the target return current and the EMP emission are presented in the case of a massive Au target irradiated with the intensity of up to 3 × 1016 W/cm2. The emission of the EMP was recorded using a 12 cm diameter Moebius loop antennas, and the target return current was measured using a new type of inductive target probe (T-probe). The simultaneous use of the inductive target probe and the Moebius loop antenna represents a new useful way of diagnosing the laser–matter interaction, which was employed to distinguish between laser-generated ion sources driven by low and high contrast laser pulses.

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3 Nukleonika

3 2015

3 Cikhardt J.

3 Řezáč K.

2 Cikhardtova B.

2 Klír D.

2 Šíla O.

1 De Marco M.

1 Kortanek J.

1 Kravárik J.

1 Krouský E.

1 Krása J.

1 Kubeš P.

1 Limpouch J.

1 Margarone D.

1 Paduch M.

1 Pfeifer M.

1 Ullschmied J.

1 Velyhan A.

1 Zielinska E.

Search results

MCNP calculations of neutron emission anisotropy caused by the GIT-12 hardware

Temporal distribution of linear densities of the plasma column in a plasma focus discharge

Electromagnetic pulses produced by expanding laser-produced Au plasma