On the scattering correction of fast-ion D-alpha signals on NSTX-U

Hao, G. Z.; Heidbrink, W. W.; Liu, D.; Stagner, L.; Podestà, M.; Bortolon, A.

doi:10.1063/1.5031879

Title: On the scattering correction of fast-ion D-alpha signals on NSTX-U

Journal Article · Mon Jun 18 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5031879· OSTI ID:1467888

Hao, G. Z. ^[1]; Heidbrink, W. W. ^[1];

^[1];

^[1]; Podestà, M. ^[2];

^[2]

Univ. of California, Irvine, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Analysis of fast-ion D-alpha (FIDA) data on National Spherical Torus Experiment-Upgrade (NSTX-U) shows that the cold Dα line contaminates the FIDA baseline. The scattered light is comparable to the FIDA emission. A scattering correction is required to extract the FIDA signal. Two methods that relate the scattered light contamination to the intensity of the cold Dα line are employed. Here, one method uses laboratory measurements with a calibration lamp; the other method uses data acquired during plasma operation and singular value decomposition analysis. Finally, after correction, both the FIDA spectra and spatial profile are in better agreement with theoretical predictions.

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Research Organization:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466; FG02-06ER54867; FG03-02ER54681; FG02- 06ER54867

OSTI ID:: 1467888

Alternate ID(s):: OSTI ID: 1454658

Journal Information:: Review of Scientific Instruments, Vol. 89, Issue 6; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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Cited By (1)

On the scattering correction of fast-ion D-alpha signal on NSTX-U Hao, G.; Heidbrink, W.; Liu, D. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States) https://doi.org/10.11578/1562065	dataset	January 2018