W
W.H. Urbanus
Researcher at European Atomic Energy Community
Publications - 26
Citations - 211
W.H. Urbanus is an academic researcher from European Atomic Energy Community. The author has contributed to research in topics: Undulator & Beam (structure). The author has an hindex of 8, co-authored 26 publications receiving 197 citations. Previous affiliations of W.H. Urbanus include Fundamental Research on Matter Institute for Atomic and Molecular Physics.
Papers
More filters
Journal ArticleDOI
High-power electrostatic free-electron maser as a future source for fusion plasma heating: experiments in the short-pulse regime.
W.H. Urbanus,W.A. Bongers,C.A.J. van der Geer,P. Manintveld,Jeroen Plomp,J. Pluygers,A.J. Poelman,P.H.M. Smeets,A.G.A. Verhoeven,V. L. Bratman,G. G. Denisov,Andrey V. Savilov,M Y Shmelyov,M. Caplan,A.A. Varfolomeev,S V Tolmachev,S.N. Ivanchenkov +16 more
TL;DR: A high-power, frequency-tunable electrostatic free-electron maser, being developed at the FOM Institute for Plasma Physics "Rijnhuizen," shows lasing at various frequencies and the main issues, such as the possibility of high- power, single-mode operation and frequency tuning, have been confirmed.
Journal ArticleDOI
First mm-wave generation in the FOM free electron maser
A.G.A. Verhoeven,W.A. Bongers,V. L. Bratman,M. Caplan,G. G. Denisov,C.A.J. van der Geer,G.P. Manintveld,A.J. Poelman,Jeroen Plomp,Andrey V. Savilov,P.H.M. Smeets,A.B. Sterk,W.H. Urbanus +12 more
TL;DR: The Dutch Free Electron Maser (FEM) as discussed by the authors was built as a pilot experiment for a mm-wave source for applications on future fusion research devices such as ITER, the International Tokamak Experimental Reactor.
Journal ArticleDOI
First microwave generation in the FOM free-electron maser
A.G.A. Verhoeven,W.A. Bongers,V. L. Bratman,M. Caplan,G. G. Denisov,C.A.J. van der Geer,P. Manintveld,A.J. Poelman,J. Pluygers,M.Yu. Shmelyov,P.H.M. Smeets,A.B. Sterk,W.H. Urbanus +12 more
TL;DR: In this paper, a free-electron maser (FEM) was built as a pilot experiment for a millimetre-wave source for applications on future fusion research devices such as ITER, the International Tokamak Experimental Reactor.
Journal ArticleDOI
A 130-260 GHz, 1 MW free electron maser for fusion
W.H. Urbanus,W.A. Bongers,G. van Dijk,C.A.J. van der Geer,J.P. van Ieperen,A. van der Linden,P. Manintveld,A.B. Sterk,A.V. Tulupov,A.G.A. Verhoeven,M.J. van der Wiel,V. L. Bratman,G. G. Denisov,A.A. Varfolomeev,S.N. Ivanchenkov,A.S. Khlebnikov,M. Catellino,A. Salop,M. Caplan +18 more
TL;DR: In this paper, the authors report on design work and testing of several main components of the FOM-Fusion-FEM project, showing a uniform beam current profile and a low halo current.
Journal ArticleDOI
Simulations of the build-up of transverse and longitudinal structures of the microwave field in the Fusion FEM
TL;DR: In this paper, the interaction of longitudinal and transverse modes in the Dutch fusion FEM is studied, taking the characteristics of the feedback system, provided by quasi-optical stepped reflectors, into account.