The Wendelstein 7-X phase contrast imaging diagnostic

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

doi:10.1088/1748-0221/16/01/p01014

The Wendelstein 7-X phase contrast imaging diagnostic

Journal Article · Mon Jan 18 00:00:00 EST 2021 · Journal of Instrumentation

DOI:https://doi.org/10.1088/1748-0221/16/01/p01014· OSTI ID:1851879

Huang, Z. ^[1]; Edlund, E. ^[2]; Porkolab, M. ^[3]; Bähner, J-P ^[4]; Böttger, L. -G. ^[5]; Sehren, C. v. ^[4]; Stechow, A. von ^[4]; Grulke, O. ^[5]

Massachusetts Institute of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; OSTI
State University of New York College at Cortland, NY (United States)
Massachusetts Institute of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Max Planck Institute for Plasma Physics, Greifswald (Germany)
Max Planck Institute for Plasma Physics, Greifswald (Germany); Technical University of Denmark, Lyngby (Denmark)

We report 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.

View Accepted Manuscript (DOE)

Research Organization:: Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: Euratom Research and Training Programme; USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: SC0014229

OSTI ID:: 1851879

Alternate ID(s):: OSTI ID: 23151781

Report Number(s):: PSFC/JA-20-7

Journal Information:: Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 01 Vol. 16; ISSN 1748-0221

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

References (19)

Beugungstheorie des schneidenver-fahrens und seiner verbesserten form, der phasenkontrastmethode Zernike, von F. Physica, Vol. 1, Issue 7-12 https://doi.org/10.1016/S0031-8914(34)80259-5	journal	May 1934
Design of phase contrast imaging on the HL-2A tokamak Gong, S. B.; Yu, Y.; Xu, M. Fusion Engineering and Design, Vol. 123 https://doi.org/10.1016/j.fusengdes.2017.04.072	journal	November 2017
The phase contrast method as an imaging diagnostic for plasma density fluctuations (invited) Weisen, H. Review of Scientific Instruments, Vol. 59, Issue 8 https://doi.org/10.1063/1.1140193	journal	August 1988
A phase contrast interferometer on DIII‐D Coda, S.; Porkolab, M.; Carlstrom, T. N. Review of Scientific Instruments, Vol. 63, Issue 10 https://doi.org/10.1063/1.1143516	journal	October 1992
Design of a tangential phase contrast imaging diagnostic for the TCV tokamak Marinoni, A.; Coda, S.; Chavan, R. Review of Scientific Instruments, Vol. 77, Issue 10 https://doi.org/10.1063/1.2222333	journal	October 2006
Vertical localization of phase contrast imaging diagnostic in Alcator C-Mod Lin, L.; Edlund, E. M.; Porkolab, M. Review of Scientific Instruments, Vol. 77, Issue 10 https://doi.org/10.1063/1.2228623	journal	October 2006
Two-dimensional phase contrast imaging for local turbulence measurements in large helical device (invited) Tanaka, K.; Michael, C. A.; Vyacheslavov, L. N. Review of Scientific Instruments, Vol. 79, Issue 10 https://doi.org/10.1063/1.2988821	journal	October 2008
A combined phase contrast imaging and heterodyne interferometer system for multiscale fluctuation measurements (invited) Davis, E. M.; Rost, J. C.; Porkolab, M. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5035413	journal	October 2018
Overview of the Wendelstein 7-X phase contrast imaging diagnostic Edlund, E. M.; Porkolab, M.; Huang, Z. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038804	journal	October 2018
Performance of Wendelstein 7-X stellarator plasmas during the first divertor operation phase Wolf, R. C.; Alonso, A.; Äkäslompolo, S. Physics of Plasmas, Vol. 26, Issue 8 https://doi.org/10.1063/1.5098761	journal	August 2019
Physics optimization of stellarators Grieger, G.; Lotz, W.; Merkel, P. Physics of Fluids B: Plasma Physics, Vol. 4, Issue 7 https://doi.org/10.1063/1.860481	journal	March 1992
Poloidal correlation reflectometry at W7-X: radial electric field and coherent fluctuations Windisch, T.; Krämer-Flecken, A.; Velasco, Jl Plasma Physics and Controlled Fusion, Vol. 59, Issue 10 https://doi.org/10.1088/1361-6587/aa759b	journal	August 2017
Pellet fueling experiments in Wendelstein 7-X Baldzuhn, J.; Damm, H.; Beidler, C. D. Plasma Physics and Controlled Fusion, Vol. 61, Issue 9 https://doi.org/10.1088/1361-6587/ab3567	journal	August 2019
High-performance plasmas after pellet injections in Wendelstein 7-X Bozhenkov, S. A.; Kazakov, Y.; Ford, O. P. Nuclear Fusion, Vol. 60, Issue 6 https://doi.org/10.1088/1741-4326/ab7867	journal	May 2020
Observation of Reversed Shear Alfvén Eigenmodes between Sawtooth Crashes in the Alcator C-Mod Tokamak Edlund, E. M.; Porkolab, M.; Kramer, G. J. Physical Review Letters, Vol. 102, Issue 16 https://doi.org/10.1103/PhysRevLett.102.165003	journal	April 2009
Resilience of Quasi-Isodynamic Stellarators against Trapped-Particle Instabilities Proll, J. H. E.; Helander, P.; Connor, J. W. Physical Review Letters, Vol. 108, Issue 24 https://doi.org/10.1103/PhysRevLett.108.245002	journal	June 2012
Stellarators Resist Turbulent Transport on the Electron Larmor Scale Plunk, G. G.; Xanthopoulos, P.; Weir, G. M. Physical Review Letters, Vol. 122, Issue 3 https://doi.org/10.1103/PhysRevLett.122.035002	journal	January 2019
Intrinsic Turbulence Stabilization in a Stellarator Xanthopoulos, P.; Plunk, G. G.; Zocco, A. Physical Review X, Vol. 6, Issue 2 https://doi.org/10.1103/PhysRevX.6.021033	journal	June 2016
Phase contrast imaging of waves and instabilities in high temperature magnetized fusion plasmas Porkolab, M.; Rost, J. C.; Basse, N. IEEE Transactions on Plasma Science, Vol. 34, Issue 2 https://doi.org/10.1109/TPS.2006.872181	journal	April 2006

Similar Records

Overview of the Wendelstein 7-X phase contrast imaging diagnostic

Journal Article · Wed Aug 15 20:00:00 EDT 2018 · Review of Scientific Instruments · OSTI ID:1612118

Localized phase contrast imaging at the Wendelstein 7-X stellarator

Journal Article · Tue Jun 11 20:00:00 EDT 2024 · Physics of Plasmas · OSTI ID:2567665

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY

The Wendelstein 7-X phase contrast imaging diagnostic

Citation Formats

References (19)

Similar Records

Related Subjects