Experimental study of conical liner magnetic implosion [pulsed power technology] Carlotti, X.; Desanlis, T.; Endignoux, L. ...
PPPS-2001 Pulsed Power Plasma Science 2001. 28th IEEE International Conference on Plasma Science and 13th IEEE International Pulsed Power Conference. Digest of Papers (Cat. No.01CH37251),
2001, Volume:
1
Conference Proceeding
Conical aluminium liner magnetic implosion, focalization on axis and subsequent high velocity matter emission were analysed through a VNIIEF/CEA joint experiment realized in Sarov. The experiment ...results are described in the present paper. Liner focalization and jet formation were to be analyzed through radiographic transverse observation. X-ray flashes were realized at expected two times values, which were only distant by 400 ns. The pictures quality is excellent. This experiment was a challenge both for generator performance (achieve high value of current in EMG and ability to transfer it to chamber) and for hydrodynamical purpose (first flight of conical liner and focalization to axis). For such a new and complex topic, experimental results exhibit very nice agreement with prediction calculations.
Experimental study of Rayleigh Taylor instability by means of magnetic implosion Azra, A.; Baclet, P.; Buchet, J. ...
PPPS-2001 Pulsed Power Plasma Science 2001. 28th IEEE International Conference on Plasma Science and 13th IEEE International Pulsed Power Conference. Digest of Papers (Cat. No.01CH37251),
2001, Volume:
1
Conference Proceeding
Rayleigh-Taylor instability (RTI) in imploding devices is to be studied if to define ICF targets. Direct use of explosive as a propellant was tested by the past to analyse RTI effects. Drawbacks of ...corresponding devices are well known: side effects, high areal masses inducing accuracy limitation in transverse radiographic observation, no simple way for pressure level modulation. They can be avoided by the use of magnetic driver and relevant device design, hereafter described. This paper presents results of a joint CEA/VNIIEF experiment dedicated to this topic. Potok type EMG with FOS was used to provide 7-8 MA current law within a few microseconds. Electrical power supply was provided by VNIIEF, target with diagnostics by CEA.
High resolution K-shell spectra of a plasma created by laser irradiation of micron-sized Ar clusters have been measured with an intensity above 10 19 W/cm 2 and a pulse duration of 30 fs
High resolution K-shell spectra of a plasma created by laser irradiation of micron-sized Ar clusters have been measured with an intensity above 10 19 W/cm 2 and a pulse duration of 30 fs
Works on the investigation of a magnetized plasma commenced and developed in the framework of MAGO (magnetic compressuring) programme, that got its official status at VNIIEF in 1979. It was directed ...to the attainment of a thermonuclear ignition in dense targets (without the use of fissionable materials) by means of their compression by liners accelerated to high velocities by a magnetic field. The investigations of the magnetized plasma were focused on the production of a hot ionized low-density plasma pre-heated up to 0.2-1.5 kV and suitable for the subsequent adiabatic pressing by the liner up to thermonuclear temperatures. The development of a new type of plasma chamber has formed the basis for a new area of the works, the calculated and theoretical justification of which has been performed by the theoretical department; the experiments have been arranged and conducted at VNIIEF Electrophysical Department. This chamber has the title 'gaseous ponderomotive unit' (GPU) or gaseous PU, and the system designed for the study of dense targets has come to be known as a liner ponderomotive unit (LPU).
MHD-nozzle device as a thermonuclear target in MAGO/MTF concept Demin, A.N.; Chernyshev, V.K.; Korchagin, V.P. ...
12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103),
1998, Volume:
2
Conference Proceeding
Describes the MAGO-MTF (magnetised target fusion) approach to fusion energy using a MHD-nozzle device as the thermonuclear target. In MAGO-MTF, thermonuclear reaction ignition has two stages: 1) ...heated magnetized plasma formation; and 2) adiabatic compression of the obtained plasma and the achievement of thermonuclear reaction burning conditions. The formation of plasma with definite temperature and lifetime is carried out by means of plasma acceleration up to ultrahigh velocities in the MHD Laval nozzle under the influence of quick-increasing magnetic field pressure and by means of the further plasma thermalisation. Some results of the MHD-nozzle device calculations are presented, in which one can see the character of plasma motion and the dynamics of its heating.
