Assessment of the measurement performance of the in-vessel system of gap 6 of the ITER Plasma Position Reflectometer using a Finite-Difference Time-Domain Maxwell full-wave code - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Review of Scientific Instruments Année : 2016

Assessment of the measurement performance of the in-vessel system of gap 6 of the ITER Plasma Position Reflectometer using a Finite-Difference Time-Domain Maxwell full-wave code

Résumé

We conducted a first assessment of the measurement performance of the in-vessel components at Gap 6 of the ITER Plasma Position Reflectometry (PPR) with the aid of a synthetic Ordinary Mode (O-mode) broadband Frequency-Modulated Continuous-Wave (FMCW) reflectometer implemented with REFMUL, a 2D Finite-Difference Time-Domain full-wave Maxwell code. These simulations take into account the system location within the vacuum vessel as well as its access to the plasma. The plasma case considered is a baseline scenario from Fusion for Energy. We concluded that for the analyzed scenario: (i) the plasma curvature and non-equatorial position of the antenna have neglectable impact on the measurements; (ii) the cavity-like space surrounding the antenna can cause deflection and splitting of the probing beam and (iii) multi-reflections on the blanket wall cause a substantial error preventing the system from operating within the required error margin
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Dates et versions

hal-01577758 , version 1 (28-08-2017)

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F. Da Silva, Stéphane Heuraux, E. Ricardo, P. Quental, Jorge Ferreira. Assessment of the measurement performance of the in-vessel system of gap 6 of the ITER Plasma Position Reflectometer using a Finite-Difference Time-Domain Maxwell full-wave code. Review of Scientific Instruments, 2016, 87 (11), pp.11E727 ⟨10.1063/1.4962356⟩. ⟨hal-01577758⟩
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