Parameter estimation in a tokamak transport model and application to l- and ff-mode simulations

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Abstract

A systematic parameter estimation method has been established and applied to estimating a priori uncertain multipliers of flux formulas in a gyro-Bohm tokaniak transport model. Results from simulating two tokamak discharge profiles with the model calibrated here arc shown. The method used here can deal with limited and relatively uncertain experimental data by using estimates of prior knowledge concerning the accuracy of the data. Confidence regions are given to assess the accuracy of estimators. The estimated multipliers are much larger than in a similar study using a nongyro-Bohm transport model [12] suggesting that mechanisms, in addition to early estimates of Ex B driven fluxes from resistive ballooning and quasi-linear drift/r/; turbulence, are needed for a complete theoretical model of flux surface-averaged transport in tokamaks.

Original languageEnglish (US)
Pages (from-to)1202-1207
Number of pages6
JournalIEEE Transactions on Plasma Science
Volume24
Issue number4
DOIs
StatePublished - 1996

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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