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Radial resolution enhancement of the NSTX Thomson scattering diagnostica)
a)Contributed paper, published as part of the Proceedings of the 19th Topical Conference on High-Temperature Plasma Diagnostics, Monterey, California, May 2012.
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View: Figures


Image of FIG. 1.
FIG. 1.

Fiber bundle splitting, (a) original bundle; (b) 10-fiber sub-bundle; and (c) 9-fiber sub-bundle.

Image of FIG. 2.
FIG. 2.

Thomson scattering measurements at seven times: (a) T e and (b) n e . Conjoint radial locations circled with a dashed line.

Image of FIG. 3.
FIG. 3.

Measurement difference in T e and n e between conjoint channels: (a) ΔT e ; (b) Δn e . Data shown against T e or n e at R = 143.6 cm.

Image of FIG. 4.
FIG. 4.

Spatial position center to center distances for 30-channel and 42-channel configurations.

Image of FIG. 5.
FIG. 5.

Schematic illustration of major radius overlap: (a) fiber bundle before division; (b) conjoint sub-bundles after division. Drawing is not to scale.

Image of FIG. 6.
FIG. 6.

Geometry for innermost fiber division. Nominal R ≈ 80 cm.

Image of FIG. 7.
FIG. 7.

Comparison of radial span evaluation: (a) current, (b) extrema, and (c) distribution, shown inside dashed circles.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Radial resolution enhancement of the NSTX Thomson scattering diagnostica)