U.S. Department of EnergyOffice of Scientific and Technical Information
On the scattering correction of fast-ion D-alpha signal 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.
- Authors:
-
- OSTI
- Publication Date:
- DOE Contract Number:
- AC02-09CH11466
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- U. S. Department of Energy
- Subject:
- Single value decomposition (SVD)
- OSTI Identifier:
- 1562065
- DOI:
- https://doi.org/10.11578/1562065
Citation Formats
Hao, G Z, Heidbrink, W W, Liu, D, Stagner, L, Podesta, M, and Bortolon, A. On the scattering correction of fast-ion D-alpha signal on NSTX-U. United States: N. p., 2018.
Web. doi:10.11578/1562065.
Hao, G Z, Heidbrink, W W, Liu, D, Stagner, L, Podesta, M, & Bortolon, A. On the scattering correction of fast-ion D-alpha signal on NSTX-U. United States. doi:https://doi.org/10.11578/1562065
Hao, G Z, Heidbrink, W W, Liu, D, Stagner, L, Podesta, M, and Bortolon, A. 2018.
"On the scattering correction of fast-ion D-alpha signal on NSTX-U". United States. doi:https://doi.org/10.11578/1562065. https://www.osti.gov/servlets/purl/1562065. Pub date:Fri Jun 01 00:00:00 EDT 2018
@article{osti_1562065,
title = {On the scattering correction of fast-ion D-alpha signal on NSTX-U},
author = {Hao, G Z and Heidbrink, W W and Liu, D and Stagner, L and Podesta, M and Bortolon, A},
abstractNote = {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.},
doi = {10.11578/1562065},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2018},
month = {Fri Jun 01 00:00:00 EDT 2018}
}
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