@article{5840,
  author = {A. G. A. Verhoeven and W. A. Bongers and V. L. Bratman and M. Caplan and G. G. Denisov and C. A. J. van der Geer and P. Manintveld and A. J. Poelman and J. Pluygers and M . Y. Shmelyov and P. H. M. Smeets and A. B. Sterk and W. H. Urbanus},
  title = {First microwave generation in the FOM free-electron maser},
  abstract = {A free-electron maser (FEM) has been 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. A unique feature of the Dutch fusion 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 first phase of the project, the so-called inverse set-up is used. The electron gun is mounted inside the high-voltage terminal. The entire beam line was tested successfully with extremely low loss current, lower than 0.05%. The first generation of millimetre waves was achieved in October 1997. The highest peak power measured so far is 700 kW at 200 GHz. This was achieved with a beam current of 8 A and an acceleration voltage of 1.77 MV. The output power, start-up time and frequency correspond well with the simulation results. The parameter scans for the longitudinal undulator gap. acceleration voltage and reflection coefficient have given a wide range of interesting data of which a few highlights are given.},
  year = {1998},
  journal = {Plasma Physics and Controlled Fusion},
  volume = {40},
  pages = {A139-A156},
  month = {Aug},
  isbn = {0741-3335},
  doi = {10.1088/0741-3335/40/8a/011},
  language = {eng},
}