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

Abstract

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:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1432936
Grant/Contract Number:  
AC02-09CH11466; FG02-06ER54867; FG03-02ER54681
Resource 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
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

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., 2018. Web. https://doi.org/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. https://doi.org/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.. Mon . "Measurement of the passive fast-ion D-alpha emission on the NSTX-U tokamak". United States. https://doi.org/10.1088/1361-6587/aa9fde. https://www.osti.gov/servlets/purl/1432936.
@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}
}

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Figures / Tables:

Figure 1 Figure 1: Time evolution of (a) plasma current, (b) injected beam power, (c) lineaveraged electron density at inner (117 cm) and outer (140 cm) chords, and (d) electron temperature. Here, 117 and 140 cm correspond to flux surface √ ψp = 0.43 and 0.87, respectively, with ψp being normalized poloidalmore » flux.« less

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Works referenced in this record:

Hydrogenic fast-ion diagnostic using Balmer-alpha light
journal, November 2004


Measurement of the Dα spectrum produced by fast ions in DIII-D
journal, March 2007

  • Luo, Y.; Heidbrink, W. W.; Burrell, K. H.
  • Review of Scientific Instruments, Vol. 78, Issue 3
  • DOI: 10.1063/1.2712806

Fast-ion Dα measurements of the fast-ion distribution (invited)
journal, October 2010

  • Heidbrink, W. W.
  • Review of Scientific Instruments, Vol. 81, Issue 10
  • DOI: 10.1063/1.3478739

Fast-ion transport in low density L-mode plasmas at TCV using FIDA spectroscopy and the TRANSP code
journal, September 2017

  • Geiger, B.; Karpushov, A. N.; Duval, B. P.
  • Plasma Physics and Controlled Fusion, Vol. 59, Issue 11
  • DOI: 10.1088/1361-6587/aa8340

Measurement and simulation of passive fast-ion D-alpha emission from the DIII-D tokamak
journal, September 2016


Dual view FIDA measurements on MAST
journal, July 2013


Multi-view fast-ion D-alpha spectroscopy diagnostic at ASDEX Upgrade
journal, November 2013

  • Geiger, B.; Dux, R.; McDermott, R. M.
  • Review of Scientific Instruments, Vol. 84, Issue 11
  • DOI: 10.1063/1.4829481

The NSTX fast-ion D-alpha diagnostic
journal, October 2008

  • Podestà, M.; Heidbrink, W. W.; Bell, R. E.
  • Review of Scientific Instruments, Vol. 79, Issue 10
  • DOI: 10.1063/1.2956744

A tangentially viewing fast ion D-alpha diagnostic for NSTX
journal, October 2010

  • Bortolon, A.; Heidbrink, W. W.; Podestà, M.
  • Review of Scientific Instruments, Vol. 81, Issue 10
  • DOI: 10.1063/1.3495768

Fast-ion D-alpha measurements at ASDEX Upgrade
journal, April 2011


Fast-ion deuterium alpha spectroscopic observations of the effects of fishbones in the Mega-Ampere Spherical Tokamak
journal, June 2013


Measurements of fast-ion acceleration at cyclotron harmonics using Balmer-alpha spectroscopy
journal, August 2007

  • Heidbrink, W. W.; Luo, Y.; Burrell, K. H.
  • Plasma Physics and Controlled Fusion, Vol. 49, Issue 9
  • DOI: 10.1088/0741-3335/49/9/008

Fast-ion D-alpha diagnostic for NSTX
journal, October 2006

  • Heidbrink, W. W.; Bell, R. E.; Luo, Y.
  • Review of Scientific Instruments, Vol. 77, Issue 10
  • DOI: 10.1063/1.2221902

On velocity-space sensitivity of fast-ion D-alpha spectroscopy
journal, September 2014


Action-angle formulation of generalized, orbit-based, fast-ion diagnostic weight functions
journal, September 2017

  • Stagner, L.; Heidbrink, W. W.
  • Physics of Plasmas, Vol. 24, Issue 9
  • DOI: 10.1063/1.4990391

A Code that Simulates Fast-Ion D α and Neutral Particle Measurements
journal, September 2011


The tokamak Monte Carlo fast ion module NUBEAM in the National Transport Code Collaboration library
journal, June 2004

  • Pankin, Alexei; McCune, Douglas; Andre, Robert
  • Computer Physics Communications, Vol. 159, Issue 3
  • DOI: 10.1016/j.cpc.2003.11.002

Enhanced Localized Energetic-Ion Losses Resulting from Single-Pass Interactions with Alfvén Eigenmodes
journal, February 2013


Midplane neutral density profiles in the National Spherical Torus Experiment
journal, August 2015

  • Stotler, D. P.; Scotti, F.; Bell, R. E.
  • Physics of Plasmas, Vol. 22, Issue 8
  • DOI: 10.1063/1.4928372

    Works referencing / citing this record:

    Fast ion D-alpha measurements using a bandpass-filtered system on EAST
    journal, October 2018

    • Zhang, J.; Huang, J.; Chang, J. F.
    • Review of Scientific Instruments, Vol. 89, Issue 10
    • DOI: 10.1063/1.5038828

    Analysis of the Transition Time between the Space-Charge-Limited and Inverse Regimes
    journal, January 2019