Abstract
A number of electron cyclotron codes have been developed in di erent Eu- ropean laboratories, to describe the behavior of EC waves in realistic tokamak plasma scenarios, and to optimize EC heating and current drive e ciency in present, and future devices like ITER. Moreover, integrated modelling is gaining popularity, since it seems to be the optimum approach for modelling tasks as complex as the assessment of future large devices performances. The outcome is presented here of a benchmark exercise for a set of EC codes, performed within the framework of the European Integrated Tokamak Mod- elling Task Force, and based on a standard ITER scenario, considering multiple launching conditions of the EC waves. The advantages o ered by integrated modelling are explored and exploited, and the sources of the small-but-still-present di erences among the various codes results are investigated.
Highlights
Electron cyclotron (EC) resonance heating and current drive (H&CD) will be one of the auxiliary systems available in ITER [1], and it is important to have the EC system ready and optimized since the first phases of operation, in order to support scenarios development
A number of EC codes, have been recently integrated into the framework developed by the European Integrated Tokamak Modelling Task Force (EFDA ITM-TF)
The EC codes calculate the propagation of EC waves from the launching point towards and within the plasma, the absorption of these waves by resonant electrons and the current driven in the plasma by this interaction
Summary
Electron cyclotron (EC) resonance heating and current drive (H&CD) will be one of the auxiliary systems available in ITER [1], and it is important to have the EC system ready and optimized since the first phases of operation, in order to support scenarios development To this goal, fast and accurate modelling tools are needed, and as an answer to this need, many laboratories developed EC codes, able to describe EC waves behavior in realistic tokamak plasma scenarios. A number of EC codes, have been recently integrated into the framework developed by the European Integrated Tokamak Modelling Task Force (EFDA ITM-TF) Within this framework, data containing physical information is exchanged between codes in a standardized way through generic data structures able to handle both simulated and experimental data. Test case, and the launch of EC waves in different configurations, was considered both from the upper launcher (UL) and from the equatorial launcher (EL), according to the present design
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