A CO2 laser based two-volume collective scattering instrument for spatially localized turbulence measurements

Mark Saffman; S. Zoletnik; Nils Plesner Basse; Winnie Edith Svendsen; G. Kocsis; M. Endler

doi:10.1063/1.1376655

A CO2 laser based two-volume collective scattering instrument for spatially localized turbulence measurements

Mark Saffman, S. Zoletnik, Nils Plesner Basse, Winnie Edith Svendsen, G. Kocsis, M. Endler

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Abstract

We describe and demonstrate a two-volume collective scattering system for localized measurements of plasma turbulence. The finite crossfield correlation length of plasma turbulence combined with spatial variations in the magnetic field direction are used to obtain spatially localized turbulence measurements at the Wendelstein 7-AS fusion experiment. By comparing with localized measurements obtained using the single wide beam technique [Truc , Rev. Sci. Instrum. 63, 3716 (1992)] we provide a proof-of-principle demonstration of the two-beam method. An optimized configuration with large toroidal separation of the measurement volumes is predicted to be capable of providing spatial resolution better than 5 cm. (C) 2001 American Institute of Physics.

Original language	English
Journal	Review of Scientific Instruments
Volume	72
Issue number	6
Pages (from-to)	2579-2592
ISSN	0034-6748
DOIs	https://doi.org/10.1063/1.1376655
Publication status	Published - 2001

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Copyright (2001) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

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abstract = "We describe and demonstrate a two-volume collective scattering system for localized measurements of plasma turbulence. The finite crossfield correlation length of plasma turbulence combined with spatial variations in the magnetic field direction are used to obtain spatially localized turbulence measurements at the Wendelstein 7-AS fusion experiment. By comparing with localized measurements obtained using the single wide beam technique [Truc , Rev. Sci. Instrum. 63, 3716 (1992)] we provide a proof-of-principle demonstration of the two-beam method. An optimized configuration with large toroidal separation of the measurement volumes is predicted to be capable of providing spatial resolution better than 5 cm. (C) 2001 American Institute of Physics.",

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T1 - A CO2 laser based two-volume collective scattering instrument for spatially localized turbulence measurements

AU - Saffman, Mark

AU - Zoletnik, S.

AU - Basse, Nils Plesner

AU - Svendsen, Winnie Edith

AU - Kocsis, G.

AU - Endler, M.

N1 - Copyright (2001) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

PY - 2001

Y1 - 2001

N2 - We describe and demonstrate a two-volume collective scattering system for localized measurements of plasma turbulence. The finite crossfield correlation length of plasma turbulence combined with spatial variations in the magnetic field direction are used to obtain spatially localized turbulence measurements at the Wendelstein 7-AS fusion experiment. By comparing with localized measurements obtained using the single wide beam technique [Truc , Rev. Sci. Instrum. 63, 3716 (1992)] we provide a proof-of-principle demonstration of the two-beam method. An optimized configuration with large toroidal separation of the measurement volumes is predicted to be capable of providing spatial resolution better than 5 cm. (C) 2001 American Institute of Physics.

AB - We describe and demonstrate a two-volume collective scattering system for localized measurements of plasma turbulence. The finite crossfield correlation length of plasma turbulence combined with spatial variations in the magnetic field direction are used to obtain spatially localized turbulence measurements at the Wendelstein 7-AS fusion experiment. By comparing with localized measurements obtained using the single wide beam technique [Truc , Rev. Sci. Instrum. 63, 3716 (1992)] we provide a proof-of-principle demonstration of the two-beam method. An optimized configuration with large toroidal separation of the measurement volumes is predicted to be capable of providing spatial resolution better than 5 cm. (C) 2001 American Institute of Physics.

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EP - 2592

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 6

ER -

A CO2 laser based two-volume collective scattering instrument for spatially localized turbulence measurements

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