Thin Lenses

All multipole-like elements (RBEND, SBEND, QUADUPOLE, SEXTUPOLE, OCTUPOLE, MULTIPOLE) can have a finite or a zero length. For finite length the multipole coefficients are the coefficients per unit length; for zero length they are interpreted as the integrated strength. The SAVE command converts thin elements to thin multipoles in MAD-8 format, if OPTION,MAD8 is active.