An example system may include an electromagnet, a drive circuit electrically coupled to the electromagnet, and a controller configured to control the drive circuit to provide current to the electromagnet to generate a pulsing magnetic field. The electromagnet may include a first conductive winding, a second conductive winding, and a magnetic core. The first conductive winding may be crescent shaped. The first conductive winding may define an inner surface and an outer surface. The outer surface of the first conductive winding may include a convex portion and a concave portion. The second conductive winding may reside proximate to the concave portion of the outer surface of the first conductive winding. The outer concave segment of the first conductive winding may define a concavity, and at least a portion of the second conductive winding may reside within the concavity of the first conductive winding.