Open Access

Hermine Reichau, Oliver Meusel, Ulrich Ratzinger, Christopher Wagner

• A non-in­ter­cep­tive op­ti­cal di­ag­nos­tic sys­tem on the basis of beam to­mog­ra­phy, was de­vel­oped for the planned Frank­furt Neu­tron Source (FRANZ). The pro­ton dri­ver linac of FRANZ will pro­vide en­er­gies up to 2.0 MeV. The mea­sure­ment de­vice will non-in­ter­cep­tively de­rive re­quired beam pa­ra­me­ters at the end of the LEBT at beam en­er­gies of 120 keV and a cur­rent of 200 mA. On a nar­row space of 351.2 mm length a ro­tat­able to­mog­ra­phy tank will per­form a multi-turn to­mog­ra­phy with a high and sta­ble vac­uum pres­sure. The tank al­lows to plug dif­fer­ent mea­sure­ment equip­ment ad­di­tion­ally to the CCD Cam­era in­stalled, to per­form op­ti­cal beam to­mog­ra­phy. A col­lec­tion of de­vel­oped al­go­rithms pro­vides in­for­ma­tion about the den­sity dis­tri­b­u­tion, shape, size, lo­ca­tion and emit­tance on the basis of CCD im­ages. Sim­u­lated, as well as mea­sured data have been ap­plied to the eval­u­a­tion al­go­rithms to test the re­li­a­bil­ity of the beam. The ac­tual con­tri­bu­tion gives an overview on the cur­rent di­ag­nos­tic pos­si­bil­i­ties of this di­ag­nos­tic sys­tem.