The Wendelstein 7-X phase contrast imaging diagnostic

Z. Huang; E. Edlund; M. Porkolab; J. P. Bähner; L. G. Böttger; C. V. Sehren; A. von Stechow; O. Grulke

doi:10.1088/1748-0221/16/01/P01014

The Wendelstein 7-X phase contrast imaging diagnostic

Z. Huang^*, E. Edlund, M. Porkolab, J. P. Bähner, L. G. Böttger, C. V. Sehren, A. von Stechow, O. Grulke

^*Corresponding author for this work

Department of Physics

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Abstract

A phase contrast imaging (PCI) diagnostic has been developed for the Wendelstein 7-X (W7-X) stellarator. The PCI diagnostic provides a line-integrated measurement of turbulent electron density fluctuations, which is essential for understanding high performance scenarios that can lead to improved confinement at fusion-relevant temperatures and densities. The PCI system is also sensitive to coherent fluctuations, which arise from Alfvén eigenmodes or other MHD activity. This paper provides an overview of the hardware and the optical system and presents an example PCI measurement from the W7-X OP1.2b experimental campaign.

Original language	English
Article number	P01014
Journal	Journal of Instrumentation
Volume	16
Issue number	1
Number of pages	21
ISSN	1748-0221
DOIs	https://doi.org/10.1088/1748-0221/16/01/P01014
Publication status	Published - 2021

Keywords

Imaging
Interferometry
Nuclear instruments and methods for hot plasma diagnostics
Plasma diagnostics
Spectroscopy

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10.1088/1748-0221/16/01/P01014

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title = "The Wendelstein 7-X phase contrast imaging diagnostic",

abstract = "A phase contrast imaging (PCI) diagnostic has been developed for the Wendelstein 7-X (W7-X) stellarator. The PCI diagnostic provides a line-integrated measurement of turbulent electron density fluctuations, which is essential for understanding high performance scenarios that can lead to improved confinement at fusion-relevant temperatures and densities. The PCI system is also sensitive to coherent fluctuations, which arise from Alfv{\'e}n eigenmodes or other MHD activity. This paper provides an overview of the hardware and the optical system and presents an example PCI measurement from the W7-X OP1.2b experimental campaign.",

keywords = "Imaging, Interferometry, Nuclear instruments and methods for hot plasma diagnostics, Plasma diagnostics, Spectroscopy",

author = "Z. Huang and E. Edlund and M. Porkolab and B{\"a}hner, {J. P.} and B{\"o}ttger, {L. G.} and Sehren, {C. V.} and {von Stechow}, A. and O. Grulke",

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AU - Huang, Z.

AU - Edlund, E.

AU - Porkolab, M.

AU - Bähner, J. P.

AU - Böttger, L. G.

AU - Sehren, C. V.

AU - von Stechow, A.

AU - Grulke, O.

PY - 2021

Y1 - 2021

N2 - A phase contrast imaging (PCI) diagnostic has been developed for the Wendelstein 7-X (W7-X) stellarator. The PCI diagnostic provides a line-integrated measurement of turbulent electron density fluctuations, which is essential for understanding high performance scenarios that can lead to improved confinement at fusion-relevant temperatures and densities. The PCI system is also sensitive to coherent fluctuations, which arise from Alfvén eigenmodes or other MHD activity. This paper provides an overview of the hardware and the optical system and presents an example PCI measurement from the W7-X OP1.2b experimental campaign.

AB - A phase contrast imaging (PCI) diagnostic has been developed for the Wendelstein 7-X (W7-X) stellarator. The PCI diagnostic provides a line-integrated measurement of turbulent electron density fluctuations, which is essential for understanding high performance scenarios that can lead to improved confinement at fusion-relevant temperatures and densities. The PCI system is also sensitive to coherent fluctuations, which arise from Alfvén eigenmodes or other MHD activity. This paper provides an overview of the hardware and the optical system and presents an example PCI measurement from the W7-X OP1.2b experimental campaign.

KW - Imaging

KW - Interferometry

KW - Nuclear instruments and methods for hot plasma diagnostics

KW - Plasma diagnostics

KW - Spectroscopy

U2 - 10.1088/1748-0221/16/01/P01014

DO - 10.1088/1748-0221/16/01/P01014

M3 - Journal article

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SN - 1748-0221

VL - 16

JO - Journal of Instrumentation

JF - Journal of Instrumentation

IS - 1

M1 - P01014

ER -

The Wendelstein 7-X phase contrast imaging diagnostic

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