A follow-up of the FOM fusion FEM for 1 MW, 1 s

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...

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Bibliographic Details
Published in:Fusion engineering and design 2001, Vol.53 (1), p.577-586
Main Authors: Verhoeven, A.G.A, Bongers, W.A, Bratman, V.L, Brons, S, Denisov, G.G, van der Geer, C.A.J, van der Geer, S.B, Kruijt, O.G, de Loos, M.J, Manintveld, P, Poelman, A.J, Plomp, J, Savilov, A.V, Smeets, P.H.M, Urbanus, W.H
Format: Article
Language:English
Subjects:
Cooling
Depressed collector
Electric potential
Electrodes
Electron guns
Experimental reactors
FEM
Free-electron maser
Fusion reactors
High-power-mm waves
Millimeter waves
Mirrors
Mm-wave source
Thermal behavior of critical components
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Summary: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.
ISSN:0920-3796
1873-7196
DOI:10.1016/S0920-3796(00)00536-6