Progress in High Power Gyrotron Development Projects at KIT

KIT is actively developing high power gyrotrons for application in fusion machines with magnetic confinement of the plasma. These projects are realized in tight cooperations with European partners and include conventional (hollow cavity) gyrotrons as well as coaxial-cavity gyrotrons with increased power capabilities. For future applications in fusion devices with multi-MW ECRH systems the efficiency of gyrotron operation becomes very important. KIT is following the multi-staged depressed collector concept to maximize the efficiency. Preparations are ongoing to commission the FULGOR gyrotron teststand and operate it with full performance.