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Title: Measurement of the passive fast-ion D-alpha emission on the NSTX-U tokamak

On National Spherical Torus Experiment Upgrade, the passive fast-ion D-alpha (passive-FIDA) spectra from charge exchange (CX) between the beam ions and the background neutrals are measured and simulated. The results indicate that the passive-FIDA signal is measurable and comparable to the active-FIDA on several channels, such as at the major radius R = 117 cm. For this, active-FIDA means the active D-alpha emission from the fast ions that CX with the injected neutrals. The shapes of measured spectra are in agreement with FIDASIM simulations on many fibers. Furthermore, the passive-FIDA spatial profile agrees with the simulation. When making measurements of active-FIDA in the edge region using time-slice subtraction, variations in the passive-FIDA contribution to the signal should be considered.
Authors:
ORCiD logo [1] ;  [1] ; ORCiD logo [1] ; ORCiD logo [2] ;  [1] ;  [2] ; ORCiD logo [2] ;  [3]
  1. Univ. of California, Irvine, CA (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-09CH11466; FG02-06ER54867; FG03-02ER54681
Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 60; Journal Issue: 2; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1432936

Hao, G. Z., Heidbrink, W. W., Liu, D., Podesta, M., Stagner, L., Bell, R. E., Bortolon, A., and Scotti, F.. Measurement of the passive fast-ion D-alpha emission on the NSTX-U tokamak. United States: N. p., Web. doi:10.1088/1361-6587/aa9fde.
Hao, G. Z., Heidbrink, W. W., Liu, D., Podesta, M., Stagner, L., Bell, R. E., Bortolon, A., & Scotti, F.. Measurement of the passive fast-ion D-alpha emission on the NSTX-U tokamak. United States. doi:10.1088/1361-6587/aa9fde.
Hao, G. Z., Heidbrink, W. W., Liu, D., Podesta, M., Stagner, L., Bell, R. E., Bortolon, A., and Scotti, F.. 2018. "Measurement of the passive fast-ion D-alpha emission on the NSTX-U tokamak". United States. doi:10.1088/1361-6587/aa9fde.
@article{osti_1432936,
title = {Measurement of the passive fast-ion D-alpha emission on the NSTX-U tokamak},
author = {Hao, G. Z. and Heidbrink, W. W. and Liu, D. and Podesta, M. and Stagner, L. and Bell, R. E. and Bortolon, A. and Scotti, F.},
abstractNote = {On National Spherical Torus Experiment Upgrade, the passive fast-ion D-alpha (passive-FIDA) spectra from charge exchange (CX) between the beam ions and the background neutrals are measured and simulated. The results indicate that the passive-FIDA signal is measurable and comparable to the active-FIDA on several channels, such as at the major radius R = 117 cm. For this, active-FIDA means the active D-alpha emission from the fast ions that CX with the injected neutrals. The shapes of measured spectra are in agreement with FIDASIM simulations on many fibers. Furthermore, the passive-FIDA spatial profile agrees with the simulation. When making measurements of active-FIDA in the edge region using time-slice subtraction, variations in the passive-FIDA contribution to the signal should be considered.},
doi = {10.1088/1361-6587/aa9fde},
journal = {Plasma Physics and Controlled Fusion},
number = 2,
volume = 60,
place = {United States},
year = {2018},
month = {1}
}