Computation of lower hybrid, neutral beam and bootstrap currents in consistent MHD equilibria

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A possible scenario for steady state current drive in large, high- temperature tokamaks includes current driven by lower hybrid (LH) waves in the outer region with high-energy neutral beams (NB) used for current drive in the core. In addition, provided the poloidal beta is sufficiently high, there can be substantial bootstrap (BS) current, as observed in the TFTR and JET experiments. In work reported previously, a computer code, ACCOME, was written to obtain a solution to the MHD equations which is consistent with current driven by neutral beams, electric fields, and neoclassical (bootstrap) effects. For the computation of the solution ... continued below

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Pages: 6

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Devoto, R.S.; Blackfield, D.T.; Fenstermacher, M.E.; Bonoli, P.T. & Porkolab, M. February 1, 1989.

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A possible scenario for steady state current drive in large, high- temperature tokamaks includes current driven by lower hybrid (LH) waves in the outer region with high-energy neutral beams (NB) used for current drive in the core. In addition, provided the poloidal beta is sufficiently high, there can be substantial bootstrap (BS) current, as observed in the TFTR and JET experiments. In work reported previously, a computer code, ACCOME, was written to obtain a solution to the MHD equations which is consistent with current driven by neutral beams, electric fields, and neoclassical (bootstrap) effects. For the computation of the solution to the Grad-Shafranov equation, the SELENE code is used. Iteration is necessary between SELENE and the current-drive computations to obtain a consistent solution. In this paper we describe modifications to ACCOME to enable the computation of LH current in addition to the NB, BS, and OH currents. The next section describes the models used and then the final section presents an application to ITER. 4 refs., 4 figs.

Physical Description

Pages: 6

Notes

NTIS, PC A02/MF A01 - OSTI; 1.

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  • 16. European conference on controlled fusion and plasma physics, Venice, Italy, 13 Mar 1989

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  • Other: DE89008892
  • Report No.: UCRL-99981
  • Report No.: CONF-890302-19
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 6439827
  • Archival Resource Key: ark:/67531/metadc1209212

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Office of Scientific & Technical Information Technical Reports

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  • February 1, 1989

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  • July 5, 2018, 11:11 p.m.

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  • Oct. 19, 2018, 9:29 p.m.

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Devoto, R.S.; Blackfield, D.T.; Fenstermacher, M.E.; Bonoli, P.T. & Porkolab, M. Computation of lower hybrid, neutral beam and bootstrap currents in consistent MHD equilibria, article, February 1, 1989; United States. (digital.library.unt.edu/ark:/67531/metadc1209212/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.