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The magnetohydrodynamics interaction around a conical test body in a hypersonic argon flow is experimentally investigated. The hypersonic flow is realized in the high-enthalpy arc-heated wind tunnel of AIta Società per Azioni (S.p.A.) (Pisa, Italy) at Mach 6. The aim of experimental activity is to produce an experimental data base to be used for the validation of numerical codes for the analysis of the magnetohydrodynamics interaction. The magnetohydrodynamics interaction is obtained in the shock layer of the conical test body at the exit of the hypersonic nozzle. The electrical configuration realized allows one to enhance the effect of the magnetohydrodynamics interaction on the plasma parameters. This is done using the Hall field to generate the magnetohydrodynamics interaction and by short-circuiting the Faraday current inside the plasma of the shock layer. The magnetic flux density is produced by an array of three magnets located in the test body. Tests are performed at three different stagnation pressures. Fluid-dynamic, electrical, and optical observations have been done. The experiment showed a considerable effect of the magnetohydrodynamics interaction on the values of the quantities measured. [ABSTRACT FROM AUTHOR]