| Title | Predicted Performance of a Dc Beam Driven Fem Oscillator Designed for Fusion Applications at 200-250 Ghz |
| Publication Type | Journal Article |
| Year of Publication | 1993 |
| Authors | M. Caplan, R.WB Best, A.GA Verhoeven, M.J van der Wiel, W.H Urbanus, V.L Bratman, G.G Denisov |
| Journal | Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment |
| Volume | 331 |
| Number | 1-3 |
| Pagination | 243-249 |
| Date Published | Jul 1 |
| ISBN Number | 0168-9002 |
| Abstract | At the FOM Institute (The Netherlands) a free electron laser using a dc beam with depressed collector is being developed for plasma heating, which will be capable of producing 1 MW cw output over an adjustable tuning range of 200-250 GHz. The basic design parameters for the electron beam, undulator and waveguide circuit are determined using a 3D non-wiggle averaged waveguide mode particle interaction code including ac space charge effects. Novel features of the design include using a step-tapered two-section wiggler to achieve both the high gain (10) and the required efficiency ( approximately 5%) as well as a rectangular corrugated HE11 waveguide circuit to handle the high average power requirements. Results are presented on the FEM performance including dependence on beam emittance, percentage feedback, and operating frequency. |
| DOI | 10.1016/0168-9002(93)90051-i |
| PID | 2db597a15418099d2a22fecb0c0d150c |
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