Current status of the large-signal code TESLA: Recent development and new applications

TESLA is a 2.5D large-signal code, which is suitable for the modeling of single-beam and multiple-beam amplifiers based on linear propagating beams. Initially developed for the modeling of conventional, single-beam klystrons mainly, later on the code was extended and successfully validated to allow modeling of multiple-beam klystrons (MBKs), extended interaction klystrons (EIKs) and Inductive Output Tubes (IOTs). This work reports the current status of the code TESLA, including the latest advances in its development, validation and successful extension of its applicability.