Milestone report: Status report on time-dependent modeling for current profile feedback control

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During the past year, LLNL efforts in the DIII-D experimental program have expanded to include time-dependent modeling of advanced tokamak (AT) operating modes. Consistent with our involvement in experimental operations, we have directed our initial efforts at modeling the negative central shear (NCS) configuration, an important and attractive mode of operation for reducing the size and cost of future tokamak experiments without sacrificing performance. In this endeavor, we have brought into use the Corsica modeling code as a tool for investigating the time-dependent evolution and control of various operating modes. In our current efforts, we are contributing to the analysis ... continued below

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18 p.

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Casper, T.A.; Crotinger, J. & Haney, S. September 29, 1995.

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Description

During the past year, LLNL efforts in the DIII-D experimental program have expanded to include time-dependent modeling of advanced tokamak (AT) operating modes. Consistent with our involvement in experimental operations, we have directed our initial efforts at modeling the negative central shear (NCS) configuration, an important and attractive mode of operation for reducing the size and cost of future tokamak experiments without sacrificing performance. In this endeavor, we have brought into use the Corsica modeling code as a tool for investigating the time-dependent evolution and control of various operating modes. In our current efforts, we are contributing to the analysis of the NCS experimental data using analysis tools such as the EFIT equilibrium code and the ONETWO and TRANSP transport codes. Results of these analyses are being used for comparisons with the Corsica modeling. Future directions include the modeling of startup and sustaining of NCS (and other AT) configurations, the understanding of current drive effects, the development of current drive scenarios and control algorithms, and the design of experiments and prediction of experimental results. We are currently in the early stages of applying this powerful modeling tool to the DIII-D experimental program.

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18 p.

Notes

OSTI as DE96002815

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  • Other Information: PBD: 29 Sep 1995

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  • Other: DE96002815
  • Report No.: UCRL-ID--122226
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/135159 | External Link
  • Office of Scientific & Technical Information Report Number: 135159
  • Archival Resource Key: ark:/67531/metadc626480

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Office of Scientific & Technical Information Technical Reports

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  • September 29, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 17, 2016, 2:27 p.m.

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Casper, T.A.; Crotinger, J. & Haney, S. Milestone report: Status report on time-dependent modeling for current profile feedback control, report, September 29, 1995; California. (digital.library.unt.edu/ark:/67531/metadc626480/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.