Showing papers by "G. G. Denisov published in 1993"

Design of the 1 MW, 200 GHz, FOM fusion FEM

Abstract: The FOM Institute for Plasma Physics has obtained funding for the development of a 1 MW, long pulse, 140–250 GHz free-electron maser. The engineering design is presently being performed in an international collaboration. In this paper the main components of the free-electron maser, the electron beam line, the undulator and the millimetre-wave system, are described. The basic design parameters of these components, which are optimized with the help of a fully 3-D, particle-pusher, FEM simulation code, are reported.

Predicted performance of a dc beam driven FEM oscillator designed for fusion applications at 200–250 GHz

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 electrob 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 (∼5%) as well as a rectangular corrugated HE 11 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.

Status of the design of the 200 GHz FOM-fusion-FEM

Abstract: A Free Electron Maser is being designed for ECRH applications on future fusion devices. TheFEM will have an output power of 1 MW, a central frequency of 200 GHz and will be adjustableover the complete frequency range of 125 GHz to 250 GHz.