Wyniki wyszukiwania - BazTech

1

Magnetic field measurements on PF - 1000 and PF - 3 facilities: current sheath structure and neutron scaling

Krauz V. I., Mitrofanov K. N., Scholz M., Myalton V. V., Paduch M., Grabovskii E. V., Karpinski L., Koidan V. S., Vinogradov V. P., Vinogradova Y. V., Zielinska E.

Nukleonika

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2012

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Vol. 57, No. 2

201-204

EN

The comparative analysis of the magnetic field distribution, the dynamics and structure of the plasma current sheath, and the neutron yield scaling in two largest plasma focus facilities, PF-3 and PF-1000 is done. The power-low dependence of the neutron yield on the current in the imploding plasma sheath has been demonstrated experimentally. For the first time the presence of the Bz magnetic field components is experimentally shown.

2

Studies of interaction of plasma jets generated in a plasma focus facility with an ambient plasma in external magnetic field

Filippov N., Filippova T., Filippov A., Friart D., Karakin M., Khautiev E., Krauz V., Mokeev A., Myalton V., Nikulin S., Simonet F., Tykshaev V. P., Vierne J., Vinogradov V. P.

Nukleonika

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2001

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Vol. 46, nr 1

31-34

EN

The aim of the present experiments was to reproduce and to study in laboratory quasi-perpendicular supercritical collisionless shocks similar to the Earth-Solar Wind shock, by using a plasma focus facility as the plasma source. The experiments were performed on the PF-3 facility (Filippov-type plasma focus) at a level of energy supply of about 1 MJ. Directed plasma jets are produced with axial velocities ~107 cm/s after compression of a plasma-current sheath in the initial stage of plasma focus formation. These jets then travel through an ambient plasma resulting in early gas ionization by X-ray radiation from the plasma focus, and at an angle of 90° to the 2500 G external magnetic field applied by a system based on rear-earth magnets. Our experimental conditions allowed us to reach a range MA ~ 5÷10.

3

Multichannel calorimeters for measurement of flows of X-ray radiation in the range from 10 up to 200 keV

Vinogradov V. P.

Nukleonika

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2001

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Vol. 46, suppl. 1

99--101

EN

An 8-channel calorimeter was developed and applied to the Plasma focus facility (PF) with flat geometry of electrodes (Filippov type) for the measurements of a hard X-ray (HXR) radiation yield and its spectral distribution. The calorimeter measures the time-integrated HXR flux for one shot of the PF facility without any additional calibrations. The sensitivity ~10–4 J/cm2 was achieved.

4

Dena, a new PF device

Tafreshi M. A., Farrahi M., Lamehi M., Goudarzi S., Habibi H., Memarzadeh M., Siahpoush V., Saeedzadeh E., Vinogradov V. P., Krauz V. I., Krivtsov V. A., Karakin M. A., Myalton V. V., Tykshaev V. P.

Nukleonika

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2001

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Vol. 46, suppl. 1

85--87

EN

In this paper we are going to introduce “Dena”, a new Filippov type plasma focus facility, with a condenser bank of 0.288 mF, and a maximum supplying energy of 90 kJ (at Vmax= 25 kV). The facility was installed and started to work in the first quarter of the year 2000. Major points of the paper are: – Dena’s construction, functionality, and diagnostic system. – Preliminary results: Different modes of neutron, X-ray, and “hot spot” production, as well as the possibility of controlling operational mode, by changing anode configuration and initial discharge condition.