Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Diagnosing the pedestal magnetic field and magnetohydrodynamics radial structure with pedestal–scrape of layer electron cyclotron emission radiation inversion in H-mode plasma (invited)

Abstract

Forward modeling is used to interpret inversion patterns of the pedestal–Scrape of Layer (SOL) Electron Cyclotron Emission (ECE) in DIII-D H-mode experiments. The modeling not only significantly improves the ECE data interpretation quality but also leads to the potential measurements of (1) the magnetic field strength |B| at the separatrix, (2) the pedestal |B| evolution during an inter-Edge Localized Mode (ELM) period, and (3) the pedestal Magnetohydrodynamics (MHD) radial structure. The ECE shine-through effect leads to three types of pedestal–SOL radiation inversions that are discussed in this paper. The first type of inversion is the non-monotonic Te,rad profile with respect to the major radius. Using the ECE frequency at the minimum Te,rad, the inversion can be applied to measure the magnetic field |B| at the separatrix and calibrate the mapping of the ECE channels with respect to the separatrix. The second type of inversion refers to the opposite phase between the radiation fluctuations δTe,rad at the pedestal and SOL. This δTe,rad phase inversion is sensitive to density and temperature fluctuations at the pedestal foot and, thus, can be used to qualitatively measure the MHD radial structure. The third type of inversion appears when the pedestal and SOL Te,rad evolve inmore » an opposite trend, which can be used to infer the pedestal |B| field change during an inter-ELM period. Finally, the bandwidth effect on measuring δTe,rad due to pedestal MHD is also investigated in the radiation modeling.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [1];  [3]; ORCiD logo [3]; ORCiD logo [4];  [1]; ORCiD logo [1]; ORCiD logo [5]; ORCiD logo [1];  [1]
+ Show Author Affiliations
  1. Univ. of California, Davis, CA (United States)
  2. Univ. of Texas, Austin, TX (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Oak Ridge Associated Univ., Oak Ridge, TN (United States)
  5. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1899110
Alternate Identifier(s):
OSTI ID: 1893978
Grant/Contract Number:  
FC02-04ER54698; FG02-99ER54531; AC02-09CH11466; FG02-97ER54415
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 93; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma confinement; optical properties; Maxwell-Boltzmann distribution; magnetic fields; tokamaks; plasma instabilities; spectrograms; transport properties

Citation Formats

Yu, Guanying, Zhu, Yilun, Austin, Max, Chen, Ying, Cao, J., Diallo, A., Kramer, G. J., Li, Zeyu, Li, X., Liu, Xianzi, Nazikian, Raffi, Zheng, Yuan, and Luhmann, Jr., N. C. Diagnosing the pedestal magnetic field and magnetohydrodynamics radial structure with pedestal–scrape of layer electron cyclotron emission radiation inversion in H-mode plasma (invited). United States: N. p., 2022. Web. doi:10.1063/5.0099348.
Copy to clipboard
Yu, Guanying, Zhu, Yilun, Austin, Max, Chen, Ying, Cao, J., Diallo, A., Kramer, G. J., Li, Zeyu, Li, X., Liu, Xianzi, Nazikian, Raffi, Zheng, Yuan, & Luhmann, Jr., N. C. Diagnosing the pedestal magnetic field and magnetohydrodynamics radial structure with pedestal–scrape of layer electron cyclotron emission radiation inversion in H-mode plasma (invited). United States. https://doi.org/10.1063/5.0099348
Copy to clipboard
Yu, Guanying, Zhu, Yilun, Austin, Max, Chen, Ying, Cao, J., Diallo, A., Kramer, G. J., Li, Zeyu, Li, X., Liu, Xianzi, Nazikian, Raffi, Zheng, Yuan, and Luhmann, Jr., N. C. Thu . "Diagnosing the pedestal magnetic field and magnetohydrodynamics radial structure with pedestal–scrape of layer electron cyclotron emission radiation inversion in H-mode plasma (invited)". United States. https://doi.org/10.1063/5.0099348. https://www.osti.gov/servlets/purl/1899110.
Copy to clipboard
@article{osti_1899110,
title = {Diagnosing the pedestal magnetic field and magnetohydrodynamics radial structure with pedestal–scrape of layer electron cyclotron emission radiation inversion in H-mode plasma (invited)},
author = {Yu, Guanying and Zhu, Yilun and Austin, Max and Chen, Ying and Cao, J. and Diallo, A. and Kramer, G. J. and Li, Zeyu and Li, X. and Liu, Xianzi and Nazikian, Raffi and Zheng, Yuan and Luhmann, Jr., N. C.},
abstractNote = {Forward modeling is used to interpret inversion patterns of the pedestal–Scrape of Layer (SOL) Electron Cyclotron Emission (ECE) in DIII-D H-mode experiments. The modeling not only significantly improves the ECE data interpretation quality but also leads to the potential measurements of (1) the magnetic field strength |B| at the separatrix, (2) the pedestal |B| evolution during an inter-Edge Localized Mode (ELM) period, and (3) the pedestal Magnetohydrodynamics (MHD) radial structure. The ECE shine-through effect leads to three types of pedestal–SOL radiation inversions that are discussed in this paper. The first type of inversion is the non-monotonic Te,rad profile with respect to the major radius. Using the ECE frequency at the minimum Te,rad, the inversion can be applied to measure the magnetic field |B| at the separatrix and calibrate the mapping of the ECE channels with respect to the separatrix. The second type of inversion refers to the opposite phase between the radiation fluctuations δTe,rad at the pedestal and SOL. This δTe,rad phase inversion is sensitive to density and temperature fluctuations at the pedestal foot and, thus, can be used to qualitatively measure the MHD radial structure. The third type of inversion appears when the pedestal and SOL Te,rad evolve in an opposite trend, which can be used to infer the pedestal |B| field change during an inter-ELM period. Finally, the bandwidth effect on measuring δTe,rad due to pedestal MHD is also investigated in the radiation modeling.},
doi = {10.1063/5.0099348},
journal = {Review of Scientific Instruments},
number = 10,
volume = 93,
place = {United States},
year = {Thu Oct 20 00:00:00 EDT 2022},
month = {Thu Oct 20 00:00:00 EDT 2022}
}
Copy to clipboard
Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1063/5.0099348
Copyright Statement
Other availability
Search WorldCat Search WorldCat to find libraries that may hold this journal
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Works referenced in this record:

ECE-imaging of the H-mode pedestal (invited)
journal, October 2012

  • Tobias, B. J.; Austin, M. E.; Boom, J. E.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4733742

Simulations on edge localized modes mitigation with impurity seeding in the HL-2A tokamak
journal, April 2022

Electron cyclotron emission radiometer upgrade on the DIII-D tokamak
journal, March 2003

  • Austin, M. E.; Lohr, J.
  • Review of Scientific Instruments, Vol. 74, Issue 3
  • DOI: 10.1063/1.1530387

Commissioning of electron cyclotron emission imaging instrument on the DIII-D tokamak and first data
journal, October 2010

  • Tobias, B.; Domier, C. W.; Liang, T.
  • Review of Scientific Instruments, Vol. 81, Issue 10
  • DOI: 10.1063/1.3460456

Optimization of the optical system for electron cyclotron emission imaging diagnostics on the HL-2A tokamak
journal, June 2017

Design of microwave broadband CMOS transmitter and receiver circuits for MIR and ECEI plasma diagnostics
journal, April 2021

  • Chen, Ying; Zhu, Yilun; Yu, Jo-Han
  • Review of Scientific Instruments, Vol. 92, Issue 4
  • DOI: 10.1063/5.0040568

Noise suppression for MHD characterization with electron cyclotron emission imaging 1D technique
journal, March 2021

System-on-chip upgrade of millimeter-wave imaging diagnostics for fusion plasma
journal, May 2021

  • Zhu, Y.; Yu, J. -H.; Yu, G.
  • Review of Scientific Instruments, Vol. 92, Issue 5
  • DOI: 10.1063/5.0040449

Ballooning instability preventing the H-mode access in plasmas with negative triangularity shape on the DIII–D tokamak
journal, September 2021

  • Saarelma, S.; Austin, M. E.; Knolker, M.
  • Plasma Physics and Controlled Fusion, Vol. 63, Issue 10
  • DOI: 10.1088/1361-6587/ac1ea4

W-band system-on-chip electron cyclotron emission imaging system on DIII-D
journal, September 2020

  • Zhu, Y.; Yu, J. -H.; Yu, G.
  • Review of Scientific Instruments, Vol. 91, Issue 9
  • DOI: 10.1063/5.0018082

High spatial resolution upgrade of the electron cyclotron emission radiometer for the DIII-D tokamak
journal, November 2014

  • Truong, D. D.; Austin, M. E.
  • Review of Scientific Instruments, Vol. 85, Issue 11
  • DOI: 10.1063/1.4889737

Integrated package of electron cyclotron emission imaging data processing and forward modeling in OMFIT
journal, March 2021

  • Yu, G.; Zhu, Y.; Wang, Y.
  • Review of Scientific Instruments, Vol. 92, Issue 3
  • DOI: 10.1063/5.0040448

2D electron cyclotron emission imaging at ASDEX Upgrade (invited)
journal, October 2010

  • Classen, I. G. J.; Boom, J. E.; Suttrop, W.
  • Review of Scientific Instruments, Vol. 81, Issue 10
  • DOI: 10.1063/1.3483214

ECEI characterization of pedestal fluctuations in quiescent H-mode plasmas in DIII-D
journal, August 2022

  • Yu, Guanying; Nazikian, Raffi; Zhu, Yilun
  • Plasma Physics and Controlled Fusion, Vol. 64, Issue 9
  • DOI: 10.1088/1361-6587/ac7ee7

Prediction of divertor heat flux width for ITER using BOUT++ transport and turbulence module
journal, February 2019

Characterization of the separatrix plasma parameters in DIII-D
journal, May 1998

  • Porter, G. D.; Moller, J.; Brown, M.
  • Physics of Plasmas, Vol. 5, Issue 5
  • DOI: 10.1063/1.872830

Analysis of electron cyclotron emission with extended electron cyclotron forward modeling
journal, September 2018

  • Denk, S. S.; Fischer, R.; Smith, H. M.
  • Plasma Physics and Controlled Fusion, Vol. 60, Issue 10
  • DOI: 10.1088/1361-6587/aadb2f

Synthetic diagnostic for electron cyclotron emission imaging
journal, October 2018

  • Chen, M.; Zhu, Y.; Luo, C.
  • Review of Scientific Instruments, Vol. 89, Issue 10
  • DOI: 10.1063/1.5035426

ELM-free and inter-ELM divertor heat flux broadening induced by edge harmonics oscillation in NSTX
journal, October 2017

System-on-chip integrated circuit technology applications on the DIII-D tokamak for multi-field measurements
journal, January 2022

Achieving a robust grassy-ELM operation regime in CFETR
journal, February 2020

Heuristic drift-based model of the power scrape-off width in low-gas-puff H-mode tokamaks
journal, December 2011

Enhancement of the ASDEX Upgrade Real-Time Plasma Position Reflectometry Diagnostic
journal, June 2015

  • Santos, J. M.; Santos, G. S.; Zilker, M.
  • IEEE Transactions on Nuclear Science, Vol. 62, Issue 3
  • DOI: 10.1109/tns.2015.2393692

Effects of density gradients and fluctuations at the plasma edge on ECEI measurements at ASDEX Upgrade
journal, February 2018

  • Vanovac, B.; Wolfrum, E.; Denk, S. S.
  • Plasma Physics and Controlled Fusion, Vol. 60, Issue 4
  • DOI: 10.1088/1361-6587/aaa7ac

Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER
journal, August 2013

Quasi-optical electron cyclotron emission imaging diagnostic advancements on the J-TEXT tokamak
journal, June 2020

Verification and validation of integrated simulation of energetic particles in fusion plasmas
journal, April 2019

ECE electron temperature mapping errors in high-performance DIII-D discharges
journal, January 2001

110–140-GHz Wide-IF-Band 65-nm CMOS Receiver Design for Fusion Plasma Diagnostics
journal, June 2022

  • Chen, Ying; Hu, Robert; Yu, Jo-Han
  • IEEE Microwave and Wireless Components Letters, Vol. 32, Issue 6
  • DOI: 10.1109/LMWC.2021.3139628

ECRad: An electron cyclotron radiation transport solver for advanced data analysis in thermal and non-thermal fusion plasmas
journal, August 2020

Development of intelligent control module for the J-TEXT electron cyclotron emission imaging system
journal, April 2020

Millimeter-wave imaging diagnostics systems on the EAST tokamak (invited)
journal, August 2016

  • Zhu, Y. L.; Xie, J. L.; Yu, C. X.
  • Review of Scientific Instruments, Vol. 87, Issue 11
  • DOI: 10.1063/1.4959162

Numerical modeling of pedestal stability and broadband turbulence of wide-pedestal QH-mode plasmas on DIII-D
journal, May 2022

A frequency tunable, eight-channel correlation ECE system for electron temperature turbulence measurements on the DIII-D tokamak
journal, August 2016

  • Sung, C.; Peebles, W. A.; Wannberg, C.
  • Review of Scientific Instruments, Vol. 87, Issue 11
  • DOI: 10.1063/1.4961296

Synthetic diagnostics platform for fusion plasmas (invited)
journal, August 2016

  • Shi, L.; Valeo, E. J.; Tobias, B. J.
  • Review of Scientific Instruments, Vol. 87, Issue 11
  • DOI: 10.1063/1.4961553

Liquid crystal polymer receiver modules for electron cyclotron emission imaging on the DIII-D tokamak
journal, October 2018

  • Zhu, Y.; Ye, Y.; Yu, J-H.
  • Review of Scientific Instruments, Vol. 89, Issue 10
  • DOI: 10.1063/1.5035373
    Sort by:
    [ × clear filter / sort ]

    Similar Records in DOE PAGES and OSTI.GOV collections: