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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/077/06/1135-1149

    • Keywords

       

      Tokamaks; Rogowskii coil; negative current; current profile.

    • Abstract

       

      A tokamak plasma discharge having an increase in duration accompanied with enhanced runaway electron flux has been experimentally studied in this paper. The discharges have been obtained by controlling the applied vertical magnetic field ($B^{\text{appl}}_v$) to below a critical value. Such discharges have been observed to have ‘negative edge plasma currents’, detected using an internal Rogowskii coil (IRC). We have tried to correlate the runaway behaviour with the negative edge plasma currents and have explained that these observations are a result of beam plasma instabilities.

    • Author Affiliations

       

      Ramesh Narayanan1 2 A N Sekar Iyengar1

      1. Plasma Physics Division, Saha Institute of Nuclear Physics, I/AF Bidhannagar, Kolkata 700 064, India
      2. Centre for Energy Studies, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110 016, India

    • Dates

       
      Published
      December 2011
      Manuscript received
      11 October 2010
      Accepted
      19 May 2011

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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