Magnetically Insulated Shock Tube

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Abstract
Experiments were carried out in a small (1 in. diameter) electrically driven shock tube with a homogeneous longitudinal magnetic field of up to 20 000 gauss in both the discharge and expansion chambers. A 1600‐joule capacitor bank was used with deuterium pressures of 150 μ Hg or more, giving shock velocities of up to 8 cm/μsec. At magnetic field strengths of 7500 gauss and higher, several effects were found. The shock velocity was substantially increased. An interface, such as seen in diaphragm‐type shock tubes was clearly defined in the wave‐speed photographs. The reflected shock velocities were abnormally high, indicating a γ of more than 5/3. The shock fronts were observed to be convex.

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