ELEMENTARY DYNAMICS OF THE NON-ADIABATIC TRANSVERSE PINCH,
TRW SPACE TECHNOLOGY LABS LOS ANGELES CALIF
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A transverse pinch is one in which the current flows in planes perpendicular to the symmetry axis, producing a magnetic field parallel to that axis. In the more common longitudinal pinch the current flow is parallel to the symmetry axis and the resulting magnetic field lies entirely in the plane normal to the axis. If the pinching velocity is small compared to the initial thermal velocities in the plasma, the pinch may be described as adiabatic, the heating being governed by the amount of compression. In the opposite limit, where the thermal velocities are negligible compared to the velocity of the pinch, the heating is of a shock or non-adiabatic character and depends much more sensitively on the speed of the pinch than on the amount of compression.