Improving plasma shaping accuracy through consolidation of control model maintenance, diagnostic calibration, and hardware change control

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With the advent of more sophisticated techniques for control of tokamak plasmas comes the requirement for increasingly more accurate models of plasma processes and tokamak systems. Development of accurate models for DIII-D power systems, vessel, and poloidal coils is already complete, while work continues in development of general plasma response modeling techniques. Increased accuracy in estimates of parameters to be controlled is also required. It is important to ensure that errors in supporting systems such as diagnostic and command circuits do not limit the accuracy of plasma parameter estimates or inhibit the ability to derive accurate plasma/tokamak system models. To ... continued below

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7 p.

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Baggest, D.S.; Rothweil, D.A. & Pang, S. December 1, 1995.

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Description

With the advent of more sophisticated techniques for control of tokamak plasmas comes the requirement for increasingly more accurate models of plasma processes and tokamak systems. Development of accurate models for DIII-D power systems, vessel, and poloidal coils is already complete, while work continues in development of general plasma response modeling techniques. Increased accuracy in estimates of parameters to be controlled is also required. It is important to ensure that errors in supporting systems such as diagnostic and command circuits do not limit the accuracy of plasma parameter estimates or inhibit the ability to derive accurate plasma/tokamak system models. To address this issue, we have developed more formal power systems change control and power system/magnetic diagnostics calibration procedures. This paper discusses our approach to consolidating the tasks in these closely related areas. This includes, for example, defining criteria for when diagnostics should be re-calibrated along with required calibration tolerances, and implementing methods for tracking power systems hardware modifications and the resultant changes to control models.

Physical Description

7 p.

Notes

INIS; OSTI as DE97004541

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  • 16. IEEE/NPSS symposium on fusion engineering, Champaign, IL (United States), 1-5 Oct 1995

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  • Other: DE97004541
  • Report No.: GA--A22199
  • Report No.: CONF-950905--50
  • Grant Number: AC03-89ER51114
  • Office of Scientific & Technical Information Report Number: 464163
  • Archival Resource Key: ark:/67531/metadc679603

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 1, 1995

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  • July 25, 2015, 2:21 a.m.

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  • Nov. 6, 2015, 3:08 p.m.

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Baggest, D.S.; Rothweil, D.A. & Pang, S. Improving plasma shaping accuracy through consolidation of control model maintenance, diagnostic calibration, and hardware change control, article, December 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc679603/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.