Real-time implementation of the high-fidelity NBI code RABBIT into the 
discharge control system of ASDEX Upgrade

Weiland, M.; Bilato, R.; Sieglin, B.; Felici, F.; Giannone, L.; Kudlacek, O.; Rampp, M.; Scheffer, M.; Treutterer, W.; Zehetbauer, T.; the ASDEX Upgrade Team,; the EUROfusion MST Team,

doi:10.1088/1741-4326/acc31c

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Real-time implementation of the high-fidelity NBI code RABBIT into the discharge control system of ASDEX Upgrade

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Rampp, M.
Max Planck Computing and Data Facility, Max Planck Society;

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Citation

Weiland, M., Bilato, R., Sieglin, B., Felici, F., Giannone, L., Kudlacek, O., et al. (2023). Real-time implementation of the high-fidelity NBI code RABBIT into the discharge control system of ASDEX Upgrade. Nuclear Fusion, 63 (6): 066013. doi:10.1088/1741-4326/acc31c.

Cite as: https://hdl.handle.net/21.11116/0000-000D-0323-8

Abstract

For the first time, a real-time capable NBI code, which has a comparable fidelity to the much more computationally expensive Monte Carlo codes such as NUBEAM, has been coupled to the discharge control system of a tokamak. This implementation has been done at ASDEX Upgrade and is presented in this paper. Modifications to the numerical scheme of RABBIT for the time-dependent solution of the Fokker–Planck equation have been carried out to make it compatible with the non-equidistant time-steps, as they occur in real-time simulations. We demonstrate that this allows RABBIT to run in real-time both in a steady-state and time-dependent fashion and show and discuss an actual real-time simulation. Its accuracy is identified by comparing to offline RABBIT and TRANSP-NUBEAM runs (where more diagnostics are available for preciser inputs).