Semicircular superconducting deflection magnets for deflecting electron beams along a semiconductor orbit. The magnet 1 comprises a pair of race-track shaped main coils 2 and 3 disposed symmetrically with respect to the plane of the orbit S. Each one of the main coils 2 and 3 is divided into two parts...http://www.google.com/patents/US5111173?utm_source=gb-gplus-sharePatent US5111173 - Deflection electromagnet for a charged particle device
