NDLI: Control of plasma poloidal shape and position in the DIII-D tokamak

Content Provider	IEEE Xplore Digital Library
Author	Walker, M.L. Humphreys, D.A. Ferron, J.R.
Copyright Year	1997
Description	Author affiliation: Gen. Atomics, San Diego, CA, USA (Walker, M.L.)
Abstract	Discusses the techniques used now and in the past to control plasma shape and position of the DIII-D tokamak plasmas. Emphasis is placed on the ongoing transition to more sophisticated control methods which require models of the system to be controlled in order to develop controllers. Much has been learned about the adequacy of plasma models for predicting plasma evolution, but the issue of how sophisticated a model is really necessary for effective multivariable controller design is not yet resolved. We believe that some information about the effect of the plasma is needed. Our conjecture is that a model only slightly more sophisticated than the rigid radial response plasma we use here is necessary, except perhaps for detailed control of field lines around the X-point. We note that, around the X-point, a change in model assumption (flux conserving or flux dissipating) can dramatically alter the assumed motion of the field lines in response to plasma motion and thus to external conductor current changes.
Starting Page	3703
Ending Page	3708
File Size	708112
Page Count	6
File Format	PDF
ISBN	0780341872
ISSN	01912216
DOI	10.1109/CDC.1997.652432
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-12-12
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Shape control Tokamaks Plasma measurements Plasma diagnostics Magnetic field measurement Control systems Toroidal magnetic fields Position control Coils Open loop systems
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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