Modelling of Neutron Markers for the COMPASS Upgrade Tokamak and Generation of Synthetic Neutron Spectra

0565692 - ÚFP 2023 RIV DE eng J - Článek v odborném periodiku
Jaulmes, Fabien - Ficker, Ondřej - Weinzettl, Vladimír - Komm, Michael - Grover, Ondřej - Seidl, Jakub - Zadvitskiy, Georgiy - Tomešová, Eva - Pánek, Radomír
Modelling of Neutron Markers for the COMPASS Upgrade Tokamak and Generation of Synthetic Neutron Spectra.
Journal of Fusion Energy. Roč. 41, č. 2 (2022), č. článku 16. ISSN 0164-0313. E-ISSN 1572-9591
Grant CEP: GA MŠMT(CZ) EF16_019/0000768
Institucionální podpora: RVO:61389021
Klíčová slova: COMPASS upgrade * nbi * Neutron detector * Neutrons
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 1.1, rok: 2022
Způsob publikování: Omezený přístup
https://link.springer.com/article/10.1007/s10894-022-00328-6

In the future COMPASS Upgrade (Vondracek et al. in Fusion Eng Des 169:112490, https://doi.org/10.1016/j.fusengdes.2021.112490, 2021) tokamak (R0=0.894m, Bt∼5T), three distinct types of edge transport barrier are anticipated: ELMy H-mode, EDA H-mode and I-mode. The main auxiliary heating system used to access H-mode will be Neutral Beam Injection (NBI) power. The NBI will have a nominal injection energy of 80keV at a maximum injection radius Rtan=0.6m. A significant neutron yield will occur from the interaction of the beam with the plasma background. Using our orbit-following code EBdyna (Jaulmes et al. in Nucl Fusion 61, 046012, https://doi.org/10.1088/1741-4326/abd41b, 2021), we calculate the trajectories of the NBI ions during the complete thermalization process, calculate the amount of NBI ions losses and evaluate the neutron rate in steady state from the beam–plasma and beam–beam interaction. Combining it with the thermal yield, we can derive detailed synthetic spectrogram of the energy distribution of the neutrons. The markers can be further used to provide synthetic neutron spectrometer diagnostics data. Due to the reduction of the simulated neutron count seen by the detectors when the peaking of the neutron source is lower, we anticipate the need for absolute-calibration in order to recover quantitative results.
Trvalý link: https://hdl.handle.net/11104/0337201