| 摘要 |
The invention provides an insertion device for use with synchrotron radiation, including a horizontal undulator including a plurality of magnets linearly arranged along an axis of electron beams so that alternately positioned magnets have common polarity, and a vertical undulator including a plurality of magnets linearly arranged along an axis of electron beams so that alternately positioned magnets have common polarity. The horizontal and vertical undulators are perpendicularly centered about axes thereof, and arranged to be axially offset so that magnetic fields produced by the horizontal and vertical undulators are perpendicular to each other and a magnetic field produced by one of the horizontal and vertical undulators is inverted for each period of a magnetic field produced by the other. The insertion device is positioned in a straight section between bending magnets of a circular accelerator. In operation, the insertion device causes electrons beams to rotate alternately in opposite directions in a figure 8 fashion about an axis of the electron beams. <IMAGE> |
