TY - JOUR
T1 - Control-oriented modeling of the plasma particle density in tokamaks and application to real-time density profile reconstruction
AU - Blanken, T.C.
AU - Felici, F.
AU - Rapson, C.J.
AU - de Baar, M.R.
AU - Heemels, W.P.M.H.
AU - TCV team
AU - ASDEX-Upgrade team
PY - 2018/1/1
Y1 - 2018/1/1
N2 - A model-based approach to real-time reconstruction of the particle density profile in tokamak plasmas is presented, based on a dynamic state estimator. Traditionally, the density profile is reconstructed in real-time by solving an ill-conditioned inversion problem using a measurement at a single point in time. This approach is sensitive to diagnostics errors and failure. The inclusion of a dynamic model in a real-time estimation algorithm allows for reliable reconstruction despite diagnostic errors. Predictive simulations show that the model can reproduce the density evolution of discharges on TCV and ASDEX-Upgrade after tuning of a few parameters. Offline reconstructions using experimental data from TCV show accurate estimation of the density profile and show examples of fault detection of interferometry signals.
AB - A model-based approach to real-time reconstruction of the particle density profile in tokamak plasmas is presented, based on a dynamic state estimator. Traditionally, the density profile is reconstructed in real-time by solving an ill-conditioned inversion problem using a measurement at a single point in time. This approach is sensitive to diagnostics errors and failure. The inclusion of a dynamic model in a real-time estimation algorithm allows for reliable reconstruction despite diagnostic errors. Predictive simulations show that the model can reproduce the density evolution of discharges on TCV and ASDEX-Upgrade after tuning of a few parameters. Offline reconstructions using experimental data from TCV show accurate estimation of the density profile and show examples of fault detection of interferometry signals.
KW - Control-oriented modeling
KW - Density profile estimation
KW - Density profile evolution modeling
KW - Dynamic state observer
KW - Real-time profile estimation
UR - http://www.scopus.com/inward/record.url?scp=85036465234&partnerID=8YFLogxK
U2 - 10.1016/j.fusengdes.2017.11.006
DO - 10.1016/j.fusengdes.2017.11.006
M3 - Article
AN - SCOPUS:85036465234
SN - 0920-3796
VL - 126
SP - 87
EP - 103
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
ER -