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Title: Visualization of the operational space of edge-localized modes through low-dimensional embedding of probability distributions

Information visualization aimed at facilitating human perception is an important tool for the interpretation of experiments on the basis of complex multidimensional data characterizing the operational space of fusion devices. This work describes a method for visualizing the operational space on a two-dimensional map and applies it to the discrimination of type I and type III edge-localized modes (ELMs) from a series of carbon-wall ELMy discharges at JET. The approach accounts for stochastic uncertainties that play an important role in fusion data sets, by modeling measurements with probability distributions in a metric space. The method is aimed at contributing to physical understanding of ELMs as well as their control. Furthermore, it is a general method that can be applied to the modeling of various other plasma phenomena as well.
Authors:
;  [1] ;  [2] ;  [1] ;  [3] ;  [4] ;
  1. Department of Applied Physics, Ghent University, B-9000 Ghent (Belgium)
  2. (Germany)
  3. (LPP-ERM/KMS), Ecole Royale Militaire, Koninklijke Militaire School, B-1000 Brussels (Belgium)
  4. Max-Planck-Institut für Plasmaphysik, Garching D-85748 (Germany)
Publication Date:
OSTI Identifier:
22303722
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 Euratom; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CARBON; CONTROL; EDGE LOCALIZED MODES; JET TOKAMAK; PLASMA; PROBABILITY; SIMULATION; STOCHASTIC PROCESSES; THERMONUCLEAR DEVICES; TWO-DIMENSIONAL CALCULATIONS