Gyrotron development
Electron cyclotron resonance heating (ECRH) is a key technique for heating and controlling magnetically confined plasmas in fusion research. Gyrotrons, which can deliver continuous-wave power in the megawatt range, serve as the microwave sources for this purpose. Comprehensive experimental testing capabilities are essential for the development and scientific investigation of such gyrotrons. The IHM operates the world’s most modern, flexible, and high‑performance test infrastructure for this purpose. It consists of two independent facilities: the first test stand has been successfully in operation for many years, while the second facility (FULGOR) was commissioned in 2022.
The interaction analysis and components group of the IHM mainly develops simulation tools to realistically describe the behaviour of a gyrotron. The propagation of an accelerated electron beam in a magnetic field, its interaction with a microwave field and finally the impact of the electrons on the collector are taken into account. Further simulation programs deal with the design of quasi-optical components for the optimal coupling of the microwave out of the gyrotron.