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Title: Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade

Abstract

A compact and multi-view solid state neutral particle analyzer (SSNPA) diagnostic based on silicon photodiode arrays has been successfully tested on the National Spherical Torus Experiment-Upgrade. The SSNPA diagnostic provides spatially, temporally, and pitch-angle resolved measurements of fast-ion distribution by detecting fast neutral flux resulting from the charge exchange (CX) reactions. The system consists of three 16-channel subsystems: t-SSNPA viewing the plasma mid-radius and neutral beam (NB) line #2 tangentially, r-SSNPA viewing the plasma core and NB line #1 radially, and p-SSNPA with no intersection with any NB lines. Due to the setup geometry, the active CX signals of t-SSNPA and r-SSNPA are mainly sensitive to passing and trapped particles, respectively. Additionally, both t-SSNPA and r-SSNPA utilize three vertically stacked arrays with different filter thicknesses to obtain coarse energy information. The experimental data show that all channels are operational. The signal to noise ratio is typically larger than 10, and the main noise is x-ray induced signal. The active and passive CX signals are clearly observed on t-SSNPA and r-SSNPA during NB modulation. The SSNPA data also indicate significant losses of passing particles during sawteeth, while trapped particles are weakly affected. Fluctuations up to 120 kHz have been observed onmore » SSNPA, and they are strongly correlated with magnetohydrodynamics instabilities.« less

Authors:
ORCiD logo [1];  [1];  [2];  [3];  [1];  [1]
  1. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  2. Johns Hopkins Univ., Baltimore, MD (United States). Department of Physics and Astronomy
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1368180
Grant/Contract Number:  
AC02-09CH11466; FG02-06ER54867; FG03-02ER54681
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Liu, D., Heidbrink, W. W., Tritz, K., Fredrickson, E. D., Hao, G. Z., and Zhu, Y. B. Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade. United States: N. p., 2016. Web. doi:10.1063/1.4959798.
Liu, D., Heidbrink, W. W., Tritz, K., Fredrickson, E. D., Hao, G. Z., & Zhu, Y. B. Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade. United States. doi:10.1063/1.4959798.
Liu, D., Heidbrink, W. W., Tritz, K., Fredrickson, E. D., Hao, G. Z., and Zhu, Y. B. Fri . "Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade". United States. doi:10.1063/1.4959798. https://www.osti.gov/servlets/purl/1368180.
@article{osti_1368180,
title = {Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade},
author = {Liu, D. and Heidbrink, W. W. and Tritz, K. and Fredrickson, E. D. and Hao, G. Z. and Zhu, Y. B.},
abstractNote = {A compact and multi-view solid state neutral particle analyzer (SSNPA) diagnostic based on silicon photodiode arrays has been successfully tested on the National Spherical Torus Experiment-Upgrade. The SSNPA diagnostic provides spatially, temporally, and pitch-angle resolved measurements of fast-ion distribution by detecting fast neutral flux resulting from the charge exchange (CX) reactions. The system consists of three 16-channel subsystems: t-SSNPA viewing the plasma mid-radius and neutral beam (NB) line #2 tangentially, r-SSNPA viewing the plasma core and NB line #1 radially, and p-SSNPA with no intersection with any NB lines. Due to the setup geometry, the active CX signals of t-SSNPA and r-SSNPA are mainly sensitive to passing and trapped particles, respectively. Additionally, both t-SSNPA and r-SSNPA utilize three vertically stacked arrays with different filter thicknesses to obtain coarse energy information. The experimental data show that all channels are operational. The signal to noise ratio is typically larger than 10, and the main noise is x-ray induced signal. The active and passive CX signals are clearly observed on t-SSNPA and r-SSNPA during NB modulation. The SSNPA data also indicate significant losses of passing particles during sawteeth, while trapped particles are weakly affected. Fluctuations up to 120 kHz have been observed on SSNPA, and they are strongly correlated with magnetohydrodynamics instabilities.},
doi = {10.1063/1.4959798},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {2016},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Top down view of NSTX-U with six NB sources (1A, 1B and 1C from NB line #1 and 2A, 2B and 2C from NB line #2) and sightlines of three SSNPA subsystems located at Bay B, I and L.

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Works referenced in this record:

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journal, October 2006

  • Veshchev, E. A.; Ozaki, T.; Goncharov, P. R.
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A photodiode-based neutral particle bolometer for characterizing charge-exchanged fast-ion behavior
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Chapter 5: Physics of energetic ions
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Performance of the solid state neutral particle analyzer array on the national spherical torus experiment
journal, October 2006

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  • Review of Scientific Instruments, Vol. 77, Issue 10
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Compact multichannel neutral particle analyzer for measurement of energetic charge-exchanged neutrals in Alcator C-Mod
journal, August 2006

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Solid state neutral particle analyzer array on National Spherical Torus Experiment
journal, October 2004

  • Shinohara, K.; Darrow, D. S.; Roquemore, A. L.
  • Review of Scientific Instruments, Vol. 75, Issue 10
  • DOI: 10.1063/1.1785266

Design of solid state neutral particle analyzer array for National Spherical Torus Experiment-Upgrade
journal, November 2014

  • Liu, D.; Heidbrink, W. W.; Tritz, K.
  • Review of Scientific Instruments, Vol. 85, Issue 11
  • DOI: 10.1063/1.4889913

Overview of the physics and engineering design of NSTX upgrade
journal, July 2012


Compact solid-state neutral particle analyzer in current mode
journal, October 2012

  • Zhu, Y. B.; Bortolon, A.; Heidbrink, W. W.
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  • DOI: 10.1063/1.4732070

A new compact solid-state neutral particle analyser at ASDEX Upgrade: Setup and physics modeling
journal, July 2015

  • Schneider, P. A.; Blank, H.; Geiger, B.
  • Review of Scientific Instruments, Vol. 86, Issue 7
  • DOI: 10.1063/1.4926886

Invited Review Article: Contemporary instrumentation and application of charge exchange neutral particle diagnostics in magnetic fusion energy experiments
journal, January 2008

  • Medley, S. S.; Donné, A. J. H.; Kaita, R.
  • Review of Scientific Instruments, Vol. 79, Issue 1
  • DOI: 10.1063/1.2823259

Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade
dataset, January 2016

  • Liu, D.; Heidbrink, W. W.; Tritz, K.
  • Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
  • DOI: 10.11578/1367167

Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade
dataset, January 2016

  • Liu, D.; Heidbrink, W. W.; Tritz, K.
  • Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
  • DOI: 10.11578/1367167

Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade
dataset, January 2016

  • Liu, D.; Heidbrink, W.; Tritz, K.
  • Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
  • DOI: 10.11578/1562050

    Works referencing / citing this record:

    Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade
    dataset, January 2016

    • Liu, D.; Heidbrink, W. W.; Tritz, K.
    • Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
    • DOI: 10.11578/1367167

    Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade
    dataset, January 2016

    • Liu, D.; Heidbrink, W. W.; Tritz, K.
    • Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
    • DOI: 10.11578/1367167

    Solid state neutral particle analyzer array on National Spherical Torus Experiment
    journal, October 2004

    • Shinohara, K.; Darrow, D. S.; Roquemore, A. L.
    • Review of Scientific Instruments, Vol. 75, Issue 10
    • DOI: 10.1063/1.1785266

    Performance of the solid state neutral particle analyzer array on the national spherical torus experiment
    journal, October 2006

    • Liu, D.; Heidbrink, W. W.; Darrow, D. S.
    • Review of Scientific Instruments, Vol. 77, Issue 10
    • DOI: 10.1063/1.2227440

    Compact multichannel neutral particle analyzer for measurement of energetic charge-exchanged neutrals in Alcator C-Mod
    journal, August 2006

    • Tang, V.; Liptac, J.; Parker, R. R.
    • Review of Scientific Instruments, Vol. 77, Issue 8
    • DOI: 10.1063/1.2238519

    Initial angle resolved measurements of fast neutrals using a multichannel linear AXUV detector system on LHD
    journal, October 2006

    • Veshchev, E. A.; Ozaki, T.; Goncharov, P. R.
    • Review of Scientific Instruments, Vol. 77, Issue 10
    • DOI: 10.1063/1.2351916

    Invited Review Article: Contemporary instrumentation and application of charge exchange neutral particle diagnostics in magnetic fusion energy experiments
    journal, January 2008

    • Medley, S. S.; Donné, A. J. H.; Kaita, R.
    • Review of Scientific Instruments, Vol. 79, Issue 1
    • DOI: 10.1063/1.2823259

    Compact solid-state neutral particle analyzer in current mode
    journal, October 2012

    • Zhu, Y. B.; Bortolon, A.; Heidbrink, W. W.
    • Review of Scientific Instruments, Vol. 83, Issue 10
    • DOI: 10.1063/1.4732070

    A photodiode-based neutral particle bolometer for characterizing charge-exchanged fast-ion behavior
    journal, October 2012

    • Clary, R.; Smirnov, A.; Dettrick, S.
    • Review of Scientific Instruments, Vol. 83, Issue 10
    • DOI: 10.1063/1.4732860

    Design of solid state neutral particle analyzer array for National Spherical Torus Experiment-Upgrade
    journal, November 2014

    • Liu, D.; Heidbrink, W. W.; Tritz, K.
    • Review of Scientific Instruments, Vol. 85, Issue 11
    • DOI: 10.1063/1.4889913

    A new compact solid-state neutral particle analyser at ASDEX Upgrade: Setup and physics modeling
    journal, July 2015

    • Schneider, P. A.; Blank, H.; Geiger, B.
    • Review of Scientific Instruments, Vol. 86, Issue 7
    • DOI: 10.1063/1.4926886

    Overview of the physics and engineering design of NSTX upgrade
    journal, July 2012


    Scenario development during commissioning operations on the National Spherical Torus Experiment Upgrade
    journal, February 2018


    Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade
    dataset, January 2016

    • Liu, D.; Heidbrink, W.; Tritz, K.
    • Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
    • DOI: 10.11578/1562050

    Scenario development during commissioning operations on the National Spherical Torus Experiment Upgrade
    journal, February 2018


      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.