• R.M. Bodenstein, Y. Roblin, M.G. Tiefenback
  JLAB, Newport News, Virginia

The Con­tin­u­ous Elec­tron Beam Ac­cel­er­a­tor Fa­cil­i­ty (CEBAF) at Jef­fer­son Lab can be de­scribed as a se­ries of con­cate­nat­ed beam­lines. Meth­ods used to mea­sure the Twiss pa­ram­e­ters in closed orbit ma­chines are not ap­pli­ca­ble in such open ended sys­tems. We are using prop­er­ly se­lect­ed sets of real or­bits in the ac­cel­er­a­tor, as one would for nu­mer­i­cal anal­y­sis. The evo­lu­tion of these tra­jec­to­ries along the beam­line mod­els the be­hav­ior of a syn­thet­ic beam which de­ter­min­is­ti­cal­ly sup­ple­ments beam pro­file-based Twiss pa­ram­e­ter mea­sure­ments and op­ti­mizes the ef­fi­cien­cy of beam­line tun­ing. Ex­am­ples will be pre­sent­ed along­side a de­scrip­tion of the pro­cess.