skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A scalable real-time framework for Thomson scattering analysis: Application to NSTX-U

Abstract

A detailed description of a prototype setup for real-time (RT) Thomson scattering (TS) analysis is presented and implemented in the multi-point Thomson scattering (MPTS) diagnostic system at the National Spherical Torus Experiment Upgrade (NSTX-U). The data acquisition hardware was upgraded with RT capable electronics (RT-analog digital converters and a RT server) that allow for fast digitization of the laser pulse signal of eight radial MPTS channels. In addition, a new TS spectrum analysis software for a rapid calculation of electron temperature (Te) and electron density (ne) was developed. Testing of the RT hardware and data analysis software was successfully completed and benchmarked against the standard, post-shot evaluation. Timing tests were performed showing that the end-to-end processing time was reproducibly below 17 ms for the duration of at least 5 s, meeting a 60 Hz deadline by the laser pulse repetition rate over the length of a NSTX-U discharge. The presented RT framework is designed to be scalable in system size, i.e., incorporation of additional radial channels by solely adding additional RT capable hardware. In conclusion, it is scalable in its operation duration and was continuously running for up to 30 min, making it an attractive solution for machines with longmore » discharges such as advanced, non-inductive tokamaks or stellarators.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., Princeton, NJ (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. Princeton Univ., Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
NSTX-U Team
OSTI Identifier:
1510312
Alternate Identifier(s):
OSTI ID: 1506151
Grant/Contract Number:  
AC02-09Ch11466; SC0015480; SC0015878
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 90; Journal Issue: 4; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Laggner, F. M., Diallo, A., LeBlanc, B. P., Rozenblat, R., Tchilinguirian, G., and Kolemen, E. A scalable real-time framework for Thomson scattering analysis: Application to NSTX-U. United States: N. p., 2019. Web. doi:10.1063/1.5088248.
Laggner, F. M., Diallo, A., LeBlanc, B. P., Rozenblat, R., Tchilinguirian, G., & Kolemen, E. A scalable real-time framework for Thomson scattering analysis: Application to NSTX-U. United States. doi:10.1063/1.5088248.
Laggner, F. M., Diallo, A., LeBlanc, B. P., Rozenblat, R., Tchilinguirian, G., and Kolemen, E. Wed . "A scalable real-time framework for Thomson scattering analysis: Application to NSTX-U". United States. doi:10.1063/1.5088248. https://www.osti.gov/servlets/purl/1510312.
@article{osti_1510312,
title = {A scalable real-time framework for Thomson scattering analysis: Application to NSTX-U},
author = {Laggner, F. M. and Diallo, A. and LeBlanc, B. P. and Rozenblat, R. and Tchilinguirian, G. and Kolemen, E.},
abstractNote = {A detailed description of a prototype setup for real-time (RT) Thomson scattering (TS) analysis is presented and implemented in the multi-point Thomson scattering (MPTS) diagnostic system at the National Spherical Torus Experiment Upgrade (NSTX-U). The data acquisition hardware was upgraded with RT capable electronics (RT-analog digital converters and a RT server) that allow for fast digitization of the laser pulse signal of eight radial MPTS channels. In addition, a new TS spectrum analysis software for a rapid calculation of electron temperature (Te) and electron density (ne) was developed. Testing of the RT hardware and data analysis software was successfully completed and benchmarked against the standard, post-shot evaluation. Timing tests were performed showing that the end-to-end processing time was reproducibly below 17 ms for the duration of at least 5 s, meeting a 60 Hz deadline by the laser pulse repetition rate over the length of a NSTX-U discharge. The presented RT framework is designed to be scalable in system size, i.e., incorporation of additional radial channels by solely adding additional RT capable hardware. In conclusion, it is scalable in its operation duration and was continuously running for up to 30 min, making it an attractive solution for machines with long discharges such as advanced, non-inductive tokamaks or stellarators.},
doi = {10.1063/1.5088248},
journal = {Review of Scientific Instruments},
number = 4,
volume = 90,
place = {United States},
year = {2019},
month = {4}
}

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

Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Radial resolution enhancement of the NSTX Thomson scattering diagnostic
journal, October 2012

  • LeBlanc, B. P.; Diallo, A.; Labik, G.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4738655

Equilibrium properties of spherical torus plasmas in NSTX
journal, November 2001


Operation of the NSTX Thomson scattering system
journal, March 2003

  • LeBlanc, B. P.; Bell, R. E.; Johnson, D. W.
  • Review of Scientific Instruments, Vol. 74, Issue 3
  • DOI: 10.1063/1.1532763

MDS plus data acquisition system
journal, January 1997

  • Stillerman, J. A.; Fredian, T. W.; Klare, K. A.
  • Review of Scientific Instruments, Vol. 68, Issue 1
  • DOI: 10.1063/1.1147719

Control and acquisition for MAST Thomson scattering diagnostics
journal, August 2010


Real‐time digital control, data acquisition, and analysis system for the DIII‐D multipulse Thomson scattering diagnostic
journal, October 1990

  • Greenfield, C. M.; Campbell, G. L.; Carlstrom, T. N.
  • Review of Scientific Instruments, Vol. 61, Issue 10
  • DOI: 10.1063/1.1141615

Controlling marginally detached divertor plasmas
journal, May 2017


APD detector electronics for the NSTX Thomson scattering system
journal, January 2001

  • Johnson, D. W.; LeBlanc, B. P.; Long, D. L.
  • Review of Scientific Instruments, Vol. 72, Issue 1
  • DOI: 10.1063/1.1321751

Design and performance of the Thomson scattering diagnostic on LHD
journal, January 2001

  • Narihara, K.; Yamada, I.; Hayashi, H.
  • Review of Scientific Instruments, Vol. 72, Issue 1
  • DOI: 10.1063/1.1319368

High-resolution edge Thomson scattering measurements on the Alcator C-Mod tokamak
journal, January 2001

  • Hughes, J. W.; Mossessian, D. A.; Hubbard, A. E.
  • Review of Scientific Instruments, Vol. 72, Issue 1
  • DOI: 10.1063/1.1319367

RABBIT: Real-time simulation of the NBI fast-ion distribution
journal, July 2018


Real-time capable modeling of neutral beam injection on NSTX-U using neural networks
journal, March 2019


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


High resolution Thomson scattering for Joint European Torus (JET)
journal, October 2004

  • Pasqualotto, R.; Nielsen, P.; Gowers, C.
  • Review of Scientific Instruments, Vol. 75, Issue 10
  • DOI: 10.1063/1.1787922

Performance of the Thomson scattering diagnostic on Helical Symmetry Experiment
journal, October 2004

  • Zhai, K.; Anderson, F. S. B.; Willis, K.
  • Review of Scientific Instruments, Vol. 75, Issue 10
  • DOI: 10.1063/1.1788835

Plasma boundary shape control and real-time equilibrium reconstruction on NSTX-U
journal, January 2018


Analytic formula for fully relativistic Thomson scattering spectrum
journal, November 1993

  • Naito, O.; Yoshida, H.; Matoba, T.
  • Physics of Fluids B: Plasma Physics, Vol. 5, Issue 11
  • DOI: 10.1063/1.860593

Thomson scattering density calibration by Rayleigh and rotational Raman scattering on NSTX
journal, October 2008

  • LeBlanc, B. P.
  • Review of Scientific Instruments, Vol. 79, Issue 10
  • DOI: 10.1063/1.2956747

TFTR Thomson scattering system
journal, May 1985

  • Johnson, D.; Dimock, D.; Grek, B.
  • Review of Scientific Instruments, Vol. 56, Issue 5
  • DOI: 10.1063/1.1138255

Design and operation of the multipulse Thomson scattering diagnostic on DIII‐D (invited)
journal, October 1992

  • Carlstrom, T. N.; Campbell, G. L.; DeBoo, J. C.
  • Review of Scientific Instruments, Vol. 63, Issue 10
  • DOI: 10.1063/1.1143545

Bayesian modelling of fusion diagnostics
journal, May 2003


Raman scattering — A possibility of calibrating laser scattering devices
journal, February 1977


Current status of the LHD Thomson scattering system
journal, May 2012


Simple analytic form of the relativistic Thomson scattering spectrum
journal, October 1980


The Thomson scattering diagnostic at Wendelstein 7-X and its performance in the first operation phase
journal, October 2017


Plasma Diagnostics by Thomson Scattering of a Laser Beam
journal, June 1966

  • Gerry, Edward T.; Rose, D. J.
  • Journal of Applied Physics, Vol. 37, Issue 7
  • DOI: 10.1063/1.1782108

Prospects for the Thomson scattering system on NSTX-Upgrade
journal, October 2012

  • Diallo, A.; LeBlanc, B. P.; Labik, G.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4740267

A pulse-burst laser system for Thomson scattering on NSTX-U
journal, October 2017


Multipulse Thomson scattering system for the National Spherical Torus Experiment
journal, January 1999

  • Johnson, D.; Bretz, N.; LeBlanc, B.
  • Review of Scientific Instruments, Vol. 70, Issue 1
  • DOI: 10.1063/1.1149276

A 130 point Nd:YAG Thomson scattering diagnostic on MAST
journal, October 2010

  • Scannell, R.; Walsh, M. J.; Dunstan, M. R.
  • Review of Scientific Instruments, Vol. 81, Issue 10
  • DOI: 10.1063/1.3460628

Improvements in the evaluation of Thomson scattering data on ASDEX upgrade
journal, January 2001

  • Kurzan, B.; Murmann, H.; Salzmann, H.
  • Review of Scientific Instruments, Vol. 72, Issue 1
  • DOI: 10.1063/1.1321747

Calibrations of the LHD Thomson scattering system
journal, August 2016

  • Yamada, I.; Funaba, H.; Yasuhara, R.
  • Review of Scientific Instruments, Vol. 87, Issue 11
  • DOI: 10.1063/1.4961276

Design of a new Nd:YAG Thomson scattering system for MAST
journal, October 2008

  • Scannell, R.; Walsh, M. J.; Carolan, P. G.
  • Review of Scientific Instruments, Vol. 79, Issue 10
  • DOI: 10.1063/1.2971971

The Thomson scattering system at Wendelstein 7-X
journal, September 2016

  • Pasch, E.; Beurskens, M. N. A.; Bozhenkov, S. A.
  • Review of Scientific Instruments, Vol. 87, Issue 11
  • DOI: 10.1063/1.4962248

    Works referencing / citing this record:

    Development of Real-Time Software for Thomson Scattering Analysis at NSTX-U
    journal, September 2019