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To elucidate the role of the Hall effect in magnetohydrodynamic (MHD)aerobraking in rarefied flows,we measured the radial distributions of electrontemperature and density in front of a magnetized model in a rarefied argonarcjet wind tunnel using the laser Thomson scattering method. We also developeda water-cooled magnetized model to prevent thermal demagnetization during themeasurement. The measured electron density distributions are in excellentagreement with computational fluid dynamics (CFD) predictions. It was alsofound that the magnetic field had little effect on the electron densitydistribution around the model. In the case without the magnetic field, themeasured electron temperature almost agreed with the CFD prediction. However,the measured electron temperature increase caused by applying the magneticfield is about 1,000 K less than that of the CFD prediction. This discrepancyindicates that the location of an insulating boundary in the plasma is far fromthe model.

Laser Thomson Scattering Measurements around Magnetized Model in Rarefied Argon Arcjet Plume