Investigations of After Cavity Interaction in Gyrotrons Including the Effect of Non uniform Magnetic Field formatIsbn:Softcover 9783731501299 Ishizuka Pathologisches Institut der Universität Ishizuka The authors present the subject systematically and practically 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 Studies on four different gyrotron configurations confirm that undesired interactions in the up taper region can result in additional parasitic oscillations with relative power in the 1% range