The Contact Surface in an Electromagnetic Shock Tube

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Abstract
An investigation of the luminosity structure, electron density, temperature, and arrival time of electrode material in the shock heated region of the plasma produced in a T-tube has disclosed that for the conditions studied the luminosity from this region originates primarily from gases that have passed through the contact surface. A plausible explanation for this mixing of discharge gases with shock heated gas is discussed. The proposed inertial instability of the contact front is an alternative explanation rather than radiation absorption in the gas ahead of the luminous plasma for the high values of temperature and anomalous values of electron density that have been measured in electromagnetic shock tubes by numerous workers.

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