Drift-free magnetic equilibrium reconstruction using the response to plasma position modulation

Moreau, Ph.; Saint‐Laurent, F.; Lister, J.B.

doi:10.1016/j.fusengdes.2009.02.023

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…3, other techniques are also being considered for application to the ITER long-pulse operation. As two specific examples, R&D studies are being performed on exvessel 2-D Hall probes and neural networks [6]. Inductive sensors made with wound wire or a sintered stack of ceramic layers with printed metallic lines [Low Temperature Cofired Ceramic (LTCC)] are also being investigated for invessel installation [7].…”

Section: A Measure Magnetic Flux and Field Around The Plasma To Recomentioning

confidence: 99%

The magnetic diagnostic set for ITER

Testa

Chavan

Guterl

et al. 2009

2009 23rd IEEE/NPSS Symposium on Fusion Engineering

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Section: A Measure Magnetic Flux and Field Around The Plasma To Recomentioning

confidence: 99%

The magnetic diagnostic set for ITER

Testa

Chavan

Guterl

et al. 2009

2009 23rd IEEE/NPSS Symposium on Fusion Engineering

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Optical boundary reconstruction of tokamak plasmas for feedback control of plasma position and shape

Hommen

Baar

Nuij

et al. 2010

Review of Scientific Instruments

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Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers)Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. A new diagnostic is developed to reconstruct the plasma boundary using visible wavelength images. Exploiting the plasma's edge localized and toroidally symmetric emission profile, a new coordinate transform is presented to reconstruct the plasma boundary from a poloidal view image. The plasma boundary reconstruction is implemented in MATLAB and applied to camera images of Mega-Ampere Spherical Tokamak discharges. The optically reconstructed plasma boundaries are compared to magnetic reconstructions from the offline reconstruction code EFIT, showing very good qualitative and quantitative agreement. Average errors are within 2 cm and correlation is high. In the current software implementation, plasma boundary reconstruction from a single image takes 3 ms. The applicability and system requirements of the new optical boundary reconstruction, called OFIT, for use in both feedback control of plasma position and shape and in offline reconstruction tools are discussed.

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