Spherical magnet having a gap with a periodically varying field for a wiggler radiation source

摘要

A spherical magnet structure having an axis about which an equatorial gap is disposed into the periphery thereof, is constructed to sustain a magnetic field across the gap with the field magnitude varying periodically over a circular pattern in a plane passing perpendicularly through the axis. Such construction includes magnet segments which are configured and aligned across the gap in wedge-shaped arrangements to sustain magnetic field contributions thereacross. A source of wiggler radiation is derived by combining the magnet structure with means for introducing charged particles into the gap thereof, wherein the field influences the particles to travel circularly in a continuous periodic path.