The effect of coil (stator) winding gap (the space between the coil turn) and armature material on magnetic flux compression devices has been analyzed using the ALE3D magnetohydrodynamic code. Three winding gaps are considered: 12.70, 6.35, and 3.18 mm. For an aluminum armature (a hollow seamless metal tube filled with high explosive), the 6.35-mm winding gap performed better than 12.70- and 3.18-mm gaps. For copper armature, the 6.35- and 12.7-mm winding gaps produced the same compressed current output that was higher than the 3.18-mm gap.
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