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Measurements with magnetic field in the National Spherical Torus Experiment using the motional Stark effect with laser induced fluorescence diagnostic
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10.1063/1.4802691
/content/aip/journal/rsi/84/4/10.1063/1.4802691
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/4/10.1063/1.4802691
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Simplified overview diagram of MSE-LIF system installation on the NSTX platform.

Image of FIG. 2.
FIG. 2.

Diagram showing MSE-LIF viewing optics system in NSTX.

Image of FIG. 3.
FIG. 3.

Calculated and measured MSE-LIF radial channel locations in NSTX.

Image of FIG. 4.
FIG. 4.

Layout of diode laser, collimation optics, and volume holographic grating (VHG) for feedback. Here, the fast-axis collimation lens is labeled FAC, the slow axis collimation lens is labeled SAC, and the corrective phase plate is labeled PP. The individual laser emitters are shown separated by the pitch.

Image of FIG. 5.
FIG. 5.

Spectrometer data showing broadband lasing and feedback mode. A calculation of the area under the curve reveals 87% of the total power to be in the feedback mode. The broadband lasing peak is more than two orders of magnitude below the feedback mode peak.

Image of FIG. 6.
FIG. 6.

Fabry Perot plot with 11.6 GHz (0.017 nm) Gaussian overlay.

Image of FIG. 7.
FIG. 7.

LIF data from channels at the edge (filled disks), near the expected magnetic axis (filled squares), and the inner-most chord (circles). This data has no applied magnetic field.

Image of FIG. 8.
FIG. 8.

Data showing variation of measured total MSE spectrum width as applied magnetic field is varied.

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/content/aip/journal/rsi/84/4/10.1063/1.4802691
2013-04-29
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Measurements with magnetic field in the National Spherical Torus Experiment using the motional Stark effect with laser induced fluorescence diagnostic
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/4/10.1063/1.4802691
10.1063/1.4802691
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