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The Dutch free-electron maser: 730 kW, 200 GHz

By: Manintveld, P.; Plomp, J.; Denisov, G.G.; van der Geer, C.A.J.; Caplan, M.; Bratman, V.L.; Bongers, W.A.; Urbanus, W.H.; Verhoeven, A.G.A.; Varfolomeev, A.A.; Schuller, F.C.; Smeets, P.H.M.; Savilov, A.V.; Poelman, A.J.; Pluygers, J.;

1998 / IEEE / 0-7803-4287-9

Description

This item was taken from the IEEE Conference ' The Dutch free-electron maser: 730 kW, 200 GHz ' At the FOM Institute for Plasma Physics ""Rijnhuizen"", The Netherlands, an electrostatic high power free-electron maser is operated at various frequencies. An output power of 730 kW at 206 GHz is generated by a 7.2 A, 1.77 MeV electron beam, and 360 kW at 167 GHz is generated by a 7.0 A, 1.61 MeV electron beam. The lower output power at the latter frequency is due to relatively high losses in the present mm-wave cavity. It is shown experimentally and by simulations that, depending on the electron beam energy, the FEM can operate in single-frequency regime. So far, the pulse length was limited to some 12 /spl mu/S. Nevertheless, many aspects of generation of mm-wave power have been explored, such as the dependency on electron beam current and energy and settings of the mm-wave cavity.