A new FILDSIM model for improved velocity-space sensitivity modelling and reconstructions

Bo S. Schmidt*, Jesús Poley-Sanjuán, José Rueda-Rueda, Joaquín Galdon-Quíroga, Marcelo Baquero-Ruiz, Henrik Järleblad, Bernard C.G. Reman, Mads Rud, Andrea Valentini, Manuel García-Muñoz, Mirko Salewski

*Corresponding author for this work

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Abstract

We present a new version of the FILDSIM code (Galdon-Quíroga et al 2018 Plasma Phys. Control. Fusion 60 105005), which significantly refines the modelling of the fast-ion loss detector (FILD) signal. We demonstrate that the FILD weight functions computed using this new version of FILDSIM are more accurate relative to synthetic benchmarks than those computed using the previous version. Thus, the new version enables higher-quality velocity-space sensitivity modelling and reconstructions. We validate the improvements on experimental data from discharge #75620 at TCV. Additionally, we present a novel approach for characterizing FILDs through a gross FILD measurement and a gross weight function based on the calculations from the new version of FILDSIM. We use them to characterize the TCV FILD.

Original languageEnglish
Article number045004
JournalPlasma Physics and Controlled Fusion
Volume66
Issue number4
Number of pages13
ISSN0741-3335
DOIs
Publication statusPublished - 2024

Keywords

  • Fast ion
  • Fast-ion loss detector
  • FILDSIM
  • Inverse problem
  • Reconstruction
  • Velocity space

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