Comparing simulated and experimental spectral line splitting in visible spectroscopy diagnostics in the HL-2A tokamak
Abstract We established the passive-visible spectroscopy diagnostics (P-VSD) and active-VSD (A-VSD) spectral splitting models for the HL-2A tokamak. Spectral splitting due to the influence of electromagnetic fields on the spectra in VSD is studied. Zeeman splitting induced by the magnetic field ( B...
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Published in | Plasma science & technology Vol. 25; no. 2; pp. 25104 - 25114 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
IOP Publishing
01.02.2023
|
Subjects | |
Online Access | Get full text |
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Summary: | Abstract
We established the passive-visible spectroscopy diagnostics (P-VSD) and active-VSD (A-VSD) spectral splitting models for the HL-2A tokamak. Spectral splitting due to the influence of electromagnetic fields on the spectra in VSD is studied. Zeeman splitting induced by the magnetic field (
B
) is used to distinguish reflected light overlap in the divertor for P-VSD. Stark splitting caused by the Lorentz electric field (
E
Lorentz
) from the neutral beam injection particle’s interaction with the magnetic field (
V
beam
×
B
) is used to measure the safety factor
q
profile for A-VSD. We give a comparison and error analysis by fitting the experimental spectra with the simulation results. The distinguishing of edge (scrape-off layer and divertor) hydrogen/deuterium spectral lines and the
q
profile derived from the spectra provides a reference for HL-2M VSD. |
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Bibliography: | Institute of Plasma Physics PST-2022-0201.R3 |
ISSN: | 1009-0630 2058-6272 |
DOI: | 10.1088/2058-6272/ac910d |