Towards a new image processing system at Wendelstein 7-X: From spatial calibration to characterization of thermal events

W7-X Team

doi:10.1063/1.5045560

Towards a new image processing system at Wendelstein 7-X: From spatial calibration to characterization of thermal events

W7-X Team

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15 Scopus citations

Abstract

Wendelstein 7-X (W7-X) is the most advanced fusion experiment in the stellarator line and is aimed at proving that the stellarator concept is suitable for a fusion reactor. One of the most important issues for fusion reactors is the monitoring of plasma facing components when exposed to very high heat loads, through the use of visible and infrared (IR) cameras. In this paper, a new image processing system for the analysis of the strike lines on the inboard limiters from the first W7-X experimental campaign is presented. This system builds a model of the IR cameras through the use of spatial calibration techniques, helping to characterize the strike lines by using the information given by real spatial coordinates of each pixel. The characterization of the strike lines is made in terms of position, size, and shape, after projecting the camera image in a 2D grid which tries to preserve the curvilinear surface distances between points. The description of the strike-line shape is made by means of the Fourier Descriptors.

Original language	English (US)
Article number	123503
Journal	Review of Scientific Instruments
Volume	89
Issue number	12
DOIs	https://doi.org/10.1063/1.5045560
State	Published - Dec 1 2018

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.5045560

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@article{b3b8f9d5ac6a430f925096ce768a1e0b,

title = "Towards a new image processing system at Wendelstein 7-X: From spatial calibration to characterization of thermal events",

abstract = "Wendelstein 7-X (W7-X) is the most advanced fusion experiment in the stellarator line and is aimed at proving that the stellarator concept is suitable for a fusion reactor. One of the most important issues for fusion reactors is the monitoring of plasma facing components when exposed to very high heat loads, through the use of visible and infrared (IR) cameras. In this paper, a new image processing system for the analysis of the strike lines on the inboard limiters from the first W7-X experimental campaign is presented. This system builds a model of the IR cameras through the use of spatial calibration techniques, helping to characterize the strike lines by using the information given by real spatial coordinates of each pixel. The characterization of the strike lines is made in terms of position, size, and shape, after projecting the camera image in a 2D grid which tries to preserve the curvilinear surface distances between points. The description of the strike-line shape is made by means of the Fourier Descriptors.",

author = "\{W7-X Team\} and F. Pisano and B. Cannas and Jakubowski, \{M. W.\} and H. Niemann and \{Puig Sitjes\}, A. and Wurden, \{G. A.\} and Wolf, \{R. C.\} and A. Ali and A. Alonso and J. Baldzuhn and C. Beidler and M. Beurskens and C. Biedermann and Bosch, \{H. S.\} and S. Bozhenkov and R. Brakel and A. Dinklage and Y. Feng and G. Fuchert and J. Geiger and O. Grulke and P. Helander and M. Hirsch and U. H{\"o}fel and J. Knauer and G. Kocsis and R. K{\"o}nig and P. Kornejew and A. Kr{\"a}mer-Flecken and M. Krychowiak and M. Landreman and A. Langenberg and Laqua, \{H. P.\} and S. Lazerson and H. Maa{\ss}berg and S. Marsen and M. Marushchenko and D. Moseev and N. Pablant and E. Pasch and K. Rahbarnia and G. Schlisio and T. Stange and \{Sunn Pedersen\}, T. and F. Effenberg and D. Gates and D. Loesser and A. Reiman and P. Titus and H. Zhang",

note = "Publisher Copyright: {\textcopyright} 2018 EURATOM.",

year = "2018",

month = dec,

day = "1",

doi = "10.1063/1.5045560",

language = "English (US)",

volume = "89",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics",

number = "12",

}

TY - JOUR

T1 - Towards a new image processing system at Wendelstein 7-X

T2 - From spatial calibration to characterization of thermal events

AU - W7-X Team

AU - Pisano, F.

AU - Cannas, B.

AU - Jakubowski, M. W.

AU - Niemann, H.

AU - Puig Sitjes, A.

AU - Wurden, G. A.

AU - Wolf, R. C.

AU - Ali, A.

AU - Alonso, A.

AU - Baldzuhn, J.

AU - Beidler, C.

AU - Beurskens, M.

AU - Biedermann, C.

AU - Bosch, H. S.

AU - Bozhenkov, S.

AU - Brakel, R.

AU - Dinklage, A.

AU - Feng, Y.

AU - Fuchert, G.

AU - Geiger, J.

AU - Grulke, O.

AU - Helander, P.

AU - Hirsch, M.

AU - Höfel, U.

AU - Knauer, J.

AU - Kocsis, G.

AU - König, R.

AU - Kornejew, P.

AU - Krämer-Flecken, A.

AU - Krychowiak, M.

AU - Landreman, M.

AU - Langenberg, A.

AU - Laqua, H. P.

AU - Lazerson, S.

AU - Maaßberg, H.

AU - Marsen, S.

AU - Marushchenko, M.

AU - Moseev, D.

AU - Pablant, N.

AU - Pasch, E.

AU - Rahbarnia, K.

AU - Schlisio, G.

AU - Stange, T.

AU - Sunn Pedersen, T.

AU - Effenberg, F.

AU - Gates, D.

AU - Loesser, D.

AU - Reiman, A.

AU - Titus, P.

AU - Zhang, H.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Wendelstein 7-X (W7-X) is the most advanced fusion experiment in the stellarator line and is aimed at proving that the stellarator concept is suitable for a fusion reactor. One of the most important issues for fusion reactors is the monitoring of plasma facing components when exposed to very high heat loads, through the use of visible and infrared (IR) cameras. In this paper, a new image processing system for the analysis of the strike lines on the inboard limiters from the first W7-X experimental campaign is presented. This system builds a model of the IR cameras through the use of spatial calibration techniques, helping to characterize the strike lines by using the information given by real spatial coordinates of each pixel. The characterization of the strike lines is made in terms of position, size, and shape, after projecting the camera image in a 2D grid which tries to preserve the curvilinear surface distances between points. The description of the strike-line shape is made by means of the Fourier Descriptors.

AB - Wendelstein 7-X (W7-X) is the most advanced fusion experiment in the stellarator line and is aimed at proving that the stellarator concept is suitable for a fusion reactor. One of the most important issues for fusion reactors is the monitoring of plasma facing components when exposed to very high heat loads, through the use of visible and infrared (IR) cameras. In this paper, a new image processing system for the analysis of the strike lines on the inboard limiters from the first W7-X experimental campaign is presented. This system builds a model of the IR cameras through the use of spatial calibration techniques, helping to characterize the strike lines by using the information given by real spatial coordinates of each pixel. The characterization of the strike lines is made in terms of position, size, and shape, after projecting the camera image in a 2D grid which tries to preserve the curvilinear surface distances between points. The description of the strike-line shape is made by means of the Fourier Descriptors.

UR - https://www.scopus.com/pages/publications/85058549699

UR - https://www.scopus.com/pages/publications/85058549699#tab=citedBy

U2 - 10.1063/1.5045560

DO - 10.1063/1.5045560

M3 - Article

C2 - 30599560

AN - SCOPUS:85058549699

SN - 0034-6748

VL - 89

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 12

M1 - 123503

ER -

Towards a new image processing system at Wendelstein 7-X: From spatial calibration to characterization of thermal events

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