Soft X-ray imaging design and analysis methods on DIII-D

Morgan W. Shafer; Devon J. Battaglia; Ezekial A. Unterberg; John M. Canik; Todd E. Evans; Jeffrey H. Harris; Steven J. Meitner

doi:10.1585/pfr.6.2402041

Soft X-ray imaging design and analysis methods on DIII-D

Morgan W. Shafer, Devon J. Battaglia, Ezekial A. Unterberg, John M. Canik, Todd E. Evans, Jeffrey H. Harris, Steven J. Meitner

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A new tangential 2D Soft X-Ray Imaging System (SXRIS) is being designed to examine the edge magnetic island structure in the lower X-point region of DIII-D. A synthetic diagnostic calculation coupled to 3D emissivity estimates is used to generate phantom images. Phillips-Tikhonov regularization is used to invert the phantom images for comparison to the original emissivity model. Noise level, island size, and equilibrium accuracy are scanned to assess the feasibility of detecting edge island structures. Models of typical DIII-D discharges indicate integration times > 1ms with accurate equilibrium reconstruction are needed for small island (<3 cm) detection.

Original language	English
Article number	2402041
Journal	Plasma and Fusion Research
Volume	6
Issue number	1 SPECIAL ISSUE
DOIs	https://doi.org/10.1585/pfr.6.2402041
State	Published - 2011

Keywords

Diagnostics, Resonant magnetic perturbation
ELMS
Imaging
Inversion
Soft X-ray

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1585/pfr.6.2402041

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title = "Soft X-ray imaging design and analysis methods on DIII-D",

abstract = "A new tangential 2D Soft X-Ray Imaging System (SXRIS) is being designed to examine the edge magnetic island structure in the lower X-point region of DIII-D. A synthetic diagnostic calculation coupled to 3D emissivity estimates is used to generate phantom images. Phillips-Tikhonov regularization is used to invert the phantom images for comparison to the original emissivity model. Noise level, island size, and equilibrium accuracy are scanned to assess the feasibility of detecting edge island structures. Models of typical DIII-D discharges indicate integration times > 1ms with accurate equilibrium reconstruction are needed for small island (<3 cm) detection.",

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AU - Shafer, Morgan W.

AU - Battaglia, Devon J.

AU - Unterberg, Ezekial A.

AU - Canik, John M.

AU - Evans, Todd E.

AU - Harris, Jeffrey H.

AU - Meitner, Steven J.

PY - 2011

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AB - A new tangential 2D Soft X-Ray Imaging System (SXRIS) is being designed to examine the edge magnetic island structure in the lower X-point region of DIII-D. A synthetic diagnostic calculation coupled to 3D emissivity estimates is used to generate phantom images. Phillips-Tikhonov regularization is used to invert the phantom images for comparison to the original emissivity model. Noise level, island size, and equilibrium accuracy are scanned to assess the feasibility of detecting edge island structures. Models of typical DIII-D discharges indicate integration times > 1ms with accurate equilibrium reconstruction are needed for small island (<3 cm) detection.

KW - Diagnostics, Resonant magnetic perturbation

KW - ELMS

KW - Imaging

KW - Inversion

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JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

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ER -

Soft X-ray imaging design and analysis methods on DIII-D

Abstract

Keywords

UN SDGs

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