Finite-Bandwidth Resonances of High-Order Axial Modes (HOAM) in a   Gyrotron Cavity
  Finite-bandwidth resonances of high-order axial modes (HOAM) in an open gyrotron cavity are studied numerically using the GYROSIM problem-oriented software package for modelling, simulation and computer-aided design (CAD) of gyrotron tubes. 
Svilen Sabchevski and Toshitaka Idehara
physics.comp-ph