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Abstract HTML Views: 55 PDF Downloads: 24 Total Views/Downloads: 79
The interaction between a probe body and argon plasma flow is investigated to examine to what extent the
probe head temperature and the bow shock distance can be influenced by applying a strong magnetic field. The
experiments are performed using a strong permanent magnet installed inside a probe body with a spherical, coated probe
head. Former investigations showed strong influence on the bow shock geometry but also on the inflow plasma jet.
Several boundary conditions have been varied to evaluate their influence on the experiment. For an uncoated probe head
the measured MHD impact was found to be of the same order of magnitude as for the coated case. Electrical isolation of
the probe toward the vacuum chamber yielded only slight influence. The variation of the field strength was achieved by
changing the amount of magnet segments installed. Pictures were analyzed to document the MHD interaction for each test
case. It was found that the bow shock distance increased and the temperature of the probe head decreased while increasing
the magnetic field density. This analysis precedes a thorough characterization of the plasma condition.