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Title: Integrated modeling of temperature profiles in L-mode tokamak discharges

Simulations of doublet III-D, the joint European tokamak, and the tokamak fusion test reactor L-mode tokamak plasmas are carried out using the PTRANSP predictive integrated modeling code. The simulation and experimental temperature profiles are compared. The time evolved temperature profiles are computed utilizing the Multi-Mode anomalous transport model version 7.1 (MMM7.1) which includes transport associated with drift-resistive-inertial ballooning modes (the DRIBM model [T. Rafiq et al., Phys. Plasmas 17, 082511 (2010)]). The tokamak discharges considered involved a broad range of conditions including scans over gyroradius, ITER like current ramp-up, with and without neon impurity injection, collisionality, and low and high plasma current. The comparison of simulation and experimental temperature profiles for the discharges considered is shown for the radial range from the magnetic axis to the last closed flux surface. The regions where various modes in the Multi-Mode model contribute to transport are illustrated. In the simulations carried out using the MMM7.1 model it is found that: The drift-resistive-inertial ballooning modes contribute to the anomalous transport primarily near the edge of the plasma; transport associated with the ion temperature gradient and trapped electron modes contribute in the core region but decrease in the region of the plasma boundary; and neoclassicalmore » ion thermal transport contributes mainly near the center of the discharge.« less
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015 (United States)
  2. Tech-X Corporation, Boulder, Colorado 80303 (United States)
  3. CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB (United Kingdom)
  4. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
Publication Date:
OSTI Identifier:
22403350
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 12; Other Information: (c) 2014 EURATOM; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BALLOONING INSTABILITY; COMPARATIVE EVALUATIONS; ITER TOKAMAK; L-MODE PLASMA CONFINEMENT; NEOCLASSICAL TRANSPORT THEORY; PLASMA; SIMULATION; TFTR TOKAMAK; TRAPPED ELECTRONS