|Title||A follow-up of the FOM fusion FEM for 1 MW, 1 s|
|Publication Type||Journal Article|
|Year of Publication||2001|
|Authors||A.GA Verhoeven, W.A Bongers, V.L Bratman, S. Brons, G.G Denisov, C.AJ van der Geer, S.B van der Geer, O.G Kruijt, M.J de Loos, P. Manintveld, A.J Poelman, J. Plomp, A.V Savilov, P.HM Smeets, W.H Urbanus|
|Journal||Fusion Engineering and Design|
Experiments have been performed with the free-electron maser (FEM) at Rijnhuizen, a high-power mm-wave source. A unique feature of the FEM is the possibility to tune the frequency over the entire range from 130 to 260 GHz at an output power exceeding 1 MW. In the so-called inverse set-up, where the electron gun is mounted inside the high-voltage terminal, a peak power of 730 kW was measured at 200 GHz and of 350 kW at 167 GHz [1,2]. Furthermore, we made the design work to extend the pulse-length to 1 s. Detailed thermal behavior of the critical components is studied. Both the cavity mirrors and the depressed-collector electrodes seem to have adequate cooling. (C) 2001 Elsevier Science B.V. All rights reserved.
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