Investigations of After Cavity Interaction in Gyrotrons Including the Effect of Non uniform Magnetic Field formatIsbn:Softcover 9783731501299 "The Large Scale Structure of Pathologisches Institut der Universität "The Large Scale Structure of the Universe" Werk und Sachregister The self consistent KIT IHM multi mode code SELFT has been modified to extend the simulation domain into the radius up taper section of the gyrotron cavity where the probability of ACI exists Dynamic after cavity interaction (ACI) in megawatt class gyrotrons is investigated that could lead to lower output mode purity and increased level of internal stray radiation