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Information × Registration Number 0203U008363, 0100U006542 , R & D reports Title Melt layer errosion and ЕхВ drift, effects under hot plasma interaction with targets surface popup.stage_title Head Tereshin Vladimir Ivanovich, Registration Date 11-11-2003 Organization National Science Center "Kharkov Institute of Physics and Technology" popup.description2 the processes, taking place under the influence of powerful magnetized plasma streams with different targets, were investigated in the QSPA Kh-50 device. Graphite targets were used for analysis of electromagnetic fields generated close to the targets irradiated with plasma streams, metal targets were utilized for analysis of processes at the melt layer of irradiated samples. The value of the guided magnetic field was 5.4 kOe. The density of incident plasma was (1-2).10*16 сm*-3, ion energy ~ 200 eV, time of plasma generation (150-170) mks, magnetizing factor b = 0,2-0,3. The radial profiles of magnetic fields in the intermediate plasma layer close to the target were obtained. There was shown the presence of inductive effects under the stopping of incident plasma stream. In the case of conductive target (magnetic force lines are frosen into target) the curvature of magnetic force lines was observed under the displacing the magnetic field from the intermediate layer accompanied with appearance of radial component of magnetic field and decreasing the value of longitudinal field. In the case of non-condacive target, for instance quartz, similar effects were absent. The measurements of electrical potential and azimutal component of magnetic field in the intemediate plasma layer show the posssibility of longitudinal electric current presence. This current can equalize the potential along the magnetic force lines. Inductive drift effects can essentially change the proccess of plasma influence to the target and, therefore, redistribute the plasma energy loading along the target surface. The analysis of experimental results devoted to the melt layer erosion of metalls under theconditions of similat to ones taking place in reactor-tokamak under current disruption, VDE, etc was done. Experiments were carried out with using the samples of SS, copper, aluminum, titanium in two plasma accelerators with different plasma loading. It was shown that under the surface irradiation with plasma streams the inhomogeniouse melt plasma layers are criated. Their structure is rather complivative and includes microcraters and waves. the mass losses were measured for each material in dependence on the dose of irradiation. Ther was shown that errosion due to vaporisation can't explain the essential roughness of irradiated sample surfaces. Product Description popup.authors popup.nrat_date 2020-04-02 Close