Multi-megawatt gyrotrons for iter

K. E. Kreischer

doi:10.1117/12.2298215

14 December 1992 Multi-megawatt gyrotrons for iter

K. E. Kreischer

Proceedings Volume 1929, 17th International Conference on Infrared and Millimeter Waves; 19292Q (1992) https://doi.org/10.1117/12.2298215
Event: 17th International Conference on Infrared and Millimeter Waves, 1992, Pasadena, CA, United States

Abstract

Future fusion experiments such as ITER will require multi-megawatt gyrotrons in order to reduce the cost and complexity of an ECR heating system. Preliminary designs of 1-5 MW gyrotron oscillators operating at frequencies relevant to ITER (120-170 GHz) will be presented. Nonlinear theory indicates that high efficiency can be achieved at these power levels, but that highly overmoded cavities will be required. The main obstacles to reaching such powers, such as mode competition, power deposition in the tube, voltage depression, and the need to achieve efficient, single mode emission will be discussed. Recent experimental results at 140 GHz using a two-section cavity will also be presented. The high powers (1.3 MW) and efficiencies (40%) obtained with this cavity indicate that it is a good candidate for multi-megawatt operation.

Citation Download Citation

K. E. Kreischer "Multi-megawatt gyrotrons for iter", Proc. SPIE 1929, 17th International Conference on Infrared and Millimeter Waves, 19292Q (14 December 1992); https://doi.org/10.1117/12.2298215

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