Rieke diagrams for gyrotrons

Summary/conclusions Rieke diagrams provide a useful way of estimating the effect of reflections from the window on gyrotron performance. In some cases, a small change in the reflection coefficient can have a large effect on the output power and on the resonator wall losses. Rieke diagrams can also be useful in determining whether or not a mode will oscillate at all for a given set of parameters and reflection coefficieat.