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EU is developing a 1 MW cylindrical cavity gyrotron. In the last year the design of the components of the new gyrotron has been finalized while the technological design of the new tube has been defined. In the present paper, the main characteristics of the new EU gyrotron for ITER are presented.
This paper reports on a diamond Brewster angle window which has been used as a vacuum barrier in a 140 GHz step-frequency tunable high power gyrotron. This configuration ensures operation of the gyrotron at different frequencies without reflection of the RF power and provides excellent material properties of CVD diamond in the mm wave range.
This paper presents a mode competition study for a 10kW/28GHz gyrotron. Three different codes were used for cavity simulations: a single mode self-consistent code, the multi-mode non-stationary code EURIDICE and a three-dimensional Particle-In-Cell (PIC) code based on a discontinuous Galerkin approach. Competition between first and second harmonic modes was studied.
The construction of the 140 GHz, 1 MW CW gyrotrons for the 10 MW ECRH system of the stellarator W7-X at IPP Greifswald is ongoing. While acceptance testing of the gyrotrons is progressing, reliable output parameters and stable production have been achieved. This report summarizes the actual status and some topical results. Focus is put on the final construction and latest parameters measured at factory-acceptance...
Seven gyrotrons are currently in operation in the ASDEX Upgrade Electron Cyclotron Resonance Heating (ECRH) system delivering a total of 3.9 MW to the plasma at 140 GHz. The 3 new gyrotrons are capable of 2-frequency operation and may heat the plasma alternatively with 2.1 MW at 105 GHz.
A 2 MW, CW, 170 GHz coaxial-cavity gyrotron for electron cyclotron heating and current drive in the International Thermonuclear Experimental Reactor (ITER) is under development within the European Gyrotron Consortium (EGYC). To support the development of the industrial CW prototype, studies on a short pulse tube, similar to the industrial gyrotron, are performed in parallel at KIT. Significant design...
Using the reverse water gas shift reaction (RWGS) one can produce carbon monoxide from carbon dioxide with the help of a catalyst. As the reaction is endothermic external energy in form of heat has to be applied. In the project CO2RRECT (CO2-Reaction using Regenerative Energies and Catalytic Technologies) [1], one task is to construct an applicator where the heating of the catalysts for the reaction...
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