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

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

doi:10.1063/1.5031879

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

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

PPPL Tokamak Expermntl Science

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Analysis of fast-ion D-alpha (FIDA) data on National Spherical Torus Experiment-Upgrade (NSTX-U) shows that the cold D_α 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 D_α line are employed. One method uses laboratory measurements with a calibration lamp; the other method uses data acquired during plasma operation and singular value decomposition analysis. After correction, both the FIDA spectra and spatial profile are in better agreement with theoretical predictions.

Original language	English (US)
Article number	063507
Journal	Review of Scientific Instruments
Volume	89
Issue number	6
DOIs	https://doi.org/10.1063/1.5031879
State	Published - Jun 1 2018

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.5031879

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title = "On the scattering correction of fast-ion D-alpha signals on NSTX-U",

abstract = "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. One method uses laboratory measurements with a calibration lamp; the other method uses data acquired during plasma operation and singular value decomposition analysis. After correction, both the FIDA spectra and spatial profile are in better agreement with theoretical predictions.",

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doi = "10.1063/1.5031879",

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T1 - On the scattering correction of fast-ion D-alpha signals on NSTX-U

AU - Hao, G. Z.

AU - Heidbrink, W. W.

AU - Liu, D.

AU - Stagner, L.

AU - Podestà, M.

AU - Bortolon, A.

PY - 2018/6/1

Y1 - 2018/6/1

N2 - 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. One method uses laboratory measurements with a calibration lamp; the other method uses data acquired during plasma operation and singular value decomposition analysis. After correction, both the FIDA spectra and spatial profile are in better agreement with theoretical predictions.

AB - 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. One method uses laboratory measurements with a calibration lamp; the other method uses data acquired during plasma operation and singular value decomposition analysis. After correction, both the FIDA spectra and spatial profile are in better agreement with theoretical predictions.

UR - https://www.scopus.com/pages/publications/85048780716

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AN - SCOPUS:85048780716

SN - 0034-6748

VL - 89

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 6

M1 - 063507

ER -

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

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