| Title | First high power experiments with the Dutch free electron maser |
| Publication Type | Journal Article |
| Year of Publication | 1998 |
| Authors | A.GA Verhoeven, W.A Bongers, V.L Bratman, M. Caplan, G.G Denisov, G. van Dijk, C.AJ van der Geer, P. Manintveld, A.J Poelman, J. Pluygers, M.Y Shmelyov, P.HM Smeets, A.B Sterk, W.H Urbanus |
| Journal | Physics of Plasmas |
| Volume | 5 |
| Number | 5 |
| Pagination | 2029-2036 |
| Date Published | May |
| ISBN Number | 1070-664X |
| Abstract | A free electron maser (FEM) has been built as a mm-wave source for applications on future fusion research devices such as ITER, the international tokamak experimental reactor [M. A. Makowski, F. Elio, and D. Loeser, April 97, Proc. 10th Workshop on ECE and ECRH, EC10, 549-559. World Scientific (1998)]. 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, a so-called inverse setup 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%. This included the accelerating structure up to 2 MV level and the transport through the undulator. First generation of mm-waves was achieved in October 1997. With an electron beam current around 8 A and an accelerator voltage of 1.76 IMV the mm-wave pulse starts after 3 mu s and lasts for 3 mu s, reaching a maximum saturated peak power level of more than 500 kW at a frequency of 200 GHz. Output power, start-up time, and frequency correspond well with simulation results. (C) 1998 American Institute of Physics. |
| DOI | 10.1063/1.872874 |
| PID | 83decbd1f79c0a555d8043ea3293aef9 |
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