Deflection system for charged-particle beam

摘要: A system for achromatically deflecting a beam of charged particles without producing net divergence the comprises three successive magnetic deflection means (A, B, C) which deflect alternately in opposite directions. first (A) and second (B) by angles less than 50° third (C) an angle at least 90°; with different respective energies are transversely spaced as they enter (C), but emerge completely superimposed both position direction, may be brought to focus (F) each two mutually perpendicular planes short distance thereafter. Such particularly compact, especially direction leaves system. is suitable electrons from linear accelerator (5,6,7) so produce vertical (or X-ray target, X-rays) can rotated about horizontal patient radiation therapy.