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Calculation of the Areas Most Likely to Appear Suitable for Communication Meteor Trails

Kharchenko H. V.

International Journal of Electronics and Telecommunications

2012

Vol. 58, No. 2

105-110

The method of calculation of the areas most likely to appear meteor trails with the electromagnetic waves specular reflection point for the radio links of different lengths is proposed. The linear electron density of the meteor trail, depending on the velocity and mass of the meteoroid, as well as zenith angles, defined by radiants of sporadic meteors and meteor showers are taken into account during calculating.

Plasma jet generation by flyer disk collision with massive target

Kasperczuk A., Pisarczyk T., Borodziuk S., Gus'kov S. Y., Ullschmied J., Krousky E., Masek K., Pfeifer M., Rohlena K., Skala J., Kalal M., Limpouch J., Pisarczyk P.

Optica Applicata

2007

Vol. 37, nr 1-2

73-82

In this paper, results from experiments with Al flyer targets (disks with a diameter of 300 mm and a thickness of 6 mm) accelerated at first to high velocities by PALS iodine laser pulses (with an energy of 130 J, pulse duration of 400 ps, a wavelength of 1.315 mm, and laser spot diameter of 250 mm), subsequently creating craters after their collisions with massive Al targets (placed at a distance of the order of 200 mm) are presented. To measure the plasma density evolution a three frame interferometric system was employed. The experimental results demonstrate that the flyer disk-massive target collision generates an axial plasma jet corresponding to a flat shock wave propagating in a massive target. This form of the shock wave was deduced from a crater trapezoidal shape which was reconstructed by means of crater replica technique.