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

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.

doi:10.1063/5.0099348

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)

Journal Article · Thu Oct 20 00:00:00 EDT 2022 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0099348· OSTI ID:1899110

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^[1]; Cao, J. ^[1]; Diallo, A. ^[3];

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^[4]; Li, X. ^[1];

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^[1]; Luhmann, Jr., N. C. ^[1]

Univ. of California, Davis, CA (United States)
Univ. of Texas, Austin, TX (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Oak Ridge Associated Univ., Oak Ridge, TN (United States)
General Atomics, San Diego, CA (United States)

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 T_e,rad profile with respect to the major radius. Using the ECE frequency at the minimum T_e,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 δT_e,rad at the pedestal and SOL. This δT_e,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 T_e,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 δT_e,rad due to pedestal MHD is also investigated in the radiation modeling.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FC02-04ER54698; FG02-99ER54531; AC02-09CH11466; FG02-97ER54415

OSTI ID:: 1899110

Alternate ID(s):: OSTI ID: 1893978

Journal Information:: Review of Scientific Instruments, Vol. 93, Issue 10; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (37)

ECE-imaging of the H-mode pedestal (invited) Tobias, B. J.; Austin, M. E.; Boom, J. E. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4733742	journal	October 2012
Simulations on edge localized modes mitigation with impurity seeding in the HL-2A tokamak Zhu, Yiren; Xiao, Guoliang; Zou, Xiaolan Nuclear Fusion, Vol. 62, Issue 7 https://doi.org/10.1088/1741-4326/ac65fb	journal	April 2022
High level of integration of front-end imaging optics system for electron cyclotron emission imaging diagnostics on the DIII-D tokamak Li, X. L.; Zhu, Y. L.; Yu, G. Y. Fusion Engineering and Design, Vol. 172 https://doi.org/10.1016/j.fusengdes.2021.112915	journal	November 2021
Electron cyclotron emission radiometer upgrade on the DIII-D tokamak Austin, M. E.; Lohr, J. Review of Scientific Instruments, Vol. 74, Issue 3 https://doi.org/10.1063/1.1530387	journal	March 2003
Commissioning of electron cyclotron emission imaging instrument on the DIII-D tokamak and first data Tobias, B.; Domier, C. W.; Liang, T. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3460456	journal	October 2010
Optimization of the optical system for electron cyclotron emission imaging diagnostics on the HL-2A tokamak Jiang, Min; Shi, Zhongbing; Zhu, Yilun Plasma Science and Technology, Vol. 19, Issue 8 https://doi.org/10.1088/2058-6272/aa62f7	journal	June 2017
Design of microwave broadband CMOS transmitter and receiver circuits for MIR and ECEI plasma diagnostics Chen, Ying; Zhu, Yilun; Yu, Jo-Han Review of Scientific Instruments, Vol. 92, Issue 4 https://doi.org/10.1063/5.0040568	journal	April 2021
Noise suppression for MHD characterization with electron cyclotron emission imaging 1D technique Yu, G.; Kramer, G. J.; Zhu, Y. Plasma Physics and Controlled Fusion, Vol. 63, Issue 5 https://doi.org/10.1088/1361-6587/abe9f2	journal	March 2021
System-on-chip upgrade of millimeter-wave imaging diagnostics for fusion plasma Zhu, Y.; Yu, J. -H.; Yu, G. Review of Scientific Instruments, Vol. 92, Issue 5 https://doi.org/10.1063/5.0040449	journal	May 2021
Ballooning instability preventing the H-mode access in plasmas with negative triangularity shape on the DIII–D tokamak Saarelma, S.; Austin, M. E.; Knolker, M. Plasma Physics and Controlled Fusion, Vol. 63, Issue 10 https://doi.org/10.1088/1361-6587/ac1ea4	journal	September 2021
W-band system-on-chip electron cyclotron emission imaging system on DIII-D Zhu, Y.; Yu, J. -H.; Yu, G. Review of Scientific Instruments, Vol. 91, Issue 9 https://doi.org/10.1063/5.0018082	journal	September 2020
High spatial resolution upgrade of the electron cyclotron emission radiometer for the DIII-D tokamak Truong, D. D.; Austin, M. E. Review of Scientific Instruments, Vol. 85, Issue 11 https://doi.org/10.1063/1.4889737	journal	November 2014
Integrated package of electron cyclotron emission imaging data processing and forward modeling in OMFIT Yu, G.; Zhu, Y.; Wang, Y. Review of Scientific Instruments, Vol. 92, Issue 3 https://doi.org/10.1063/5.0040448	journal	March 2021
2D electron cyclotron emission imaging at ASDEX Upgrade (invited) Classen, I. G. J.; Boom, J. E.; Suttrop, W. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3483214	journal	October 2010
ECEI characterization of pedestal fluctuations in quiescent H-mode plasmas in DIII-D Yu, Guanying; Nazikian, Raffi; Zhu, Yilun Plasma Physics and Controlled Fusion, Vol. 64, Issue 9 https://doi.org/10.1088/1361-6587/ac7ee7	journal	August 2022
Prediction of divertor heat flux width for ITER using BOUT++ transport and turbulence module Li, Ze-Yu; Xu, X. Q.; Li, Na-Mi Nuclear Fusion, Vol. 59, Issue 4 https://doi.org/10.1088/1741-4326/ab0184	journal	February 2019
Characterization of the separatrix plasma parameters in DIII-D Porter, G. D.; Moller, J.; Brown, M. Physics of Plasmas, Vol. 5, Issue 5 https://doi.org/10.1063/1.872830	journal	May 1998
Analysis of electron cyclotron emission with extended electron cyclotron forward modeling Denk, S. S.; Fischer, R.; Smith, H. M. Plasma Physics and Controlled Fusion, Vol. 60, Issue 10 https://doi.org/10.1088/1361-6587/aadb2f	journal	September 2018
Synthetic diagnostic for electron cyclotron emission imaging Chen, M.; Zhu, Y.; Luo, C. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5035426	journal	October 2018
ELM-free and inter-ELM divertor heat flux broadening induced by edge harmonics oscillation in NSTX Gan, K. F.; Ahn, J. -W.; Gray, T. K. Nuclear Fusion, Vol. 57, Issue 12 https://doi.org/10.1088/1741-4326/aa8c4a	journal	October 2017
System-on-chip integrated circuit technology applications on the DIII-D tokamak for multi-field measurements Zheng, Y.; Yu, G. Y.; Chen, J. Journal of Instrumentation, Vol. 17, Issue 01 https://doi.org/10.1088/1748-0221/17/01/c01013	journal	January 2022
Achieving a robust grassy-ELM operation regime in CFETR Zhu, Yi-Ren; Li, Ze-Yu; Chan, V. S. Nuclear Fusion, Vol. 60, Issue 4 https://doi.org/10.1088/1741-4326/ab72c0	journal	February 2020
Heuristic drift-based model of the power scrape-off width in low-gas-puff H-mode tokamaks Goldston, R. J. Nuclear Fusion, Vol. 52, Issue 1 https://doi.org/10.1088/0029-5515/52/1/013009	journal	December 2011
Enhancement of the ASDEX Upgrade Real-Time Plasma Position Reflectometry Diagnostic Santos, J. M.; Santos, G. S.; Zilker, M. IEEE Transactions on Nuclear Science, Vol. 62, Issue 3 https://doi.org/10.1109/tns.2015.2393692	journal	June 2015
Effects of density gradients and fluctuations at the plasma edge on ECEI measurements at ASDEX Upgrade Vanovac, B.; Wolfrum, E.; Denk, S. S. Plasma Physics and Controlled Fusion, Vol. 60, Issue 4 https://doi.org/10.1088/1361-6587/aaa7ac	journal	February 2018
Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER Eich, T.; Leonard, A. W.; Pitts, R. A. Nuclear Fusion, Vol. 53, Issue 9 https://doi.org/10.1088/0029-5515/53/9/093031	journal	August 2013
Quasi-optical electron cyclotron emission imaging diagnostic advancements on the J-TEXT tokamak Xie, X. L.; Zhou, J.; Zhu, Y. Fusion Engineering and Design, Vol. 155 https://doi.org/10.1016/j.fusengdes.2020.111636	journal	June 2020
Verification and validation of integrated simulation of energetic particles in fusion plasmas Taimourzadeh, S.; Bass, E. M.; Chen, Y. Nuclear Fusion, Vol. 59, Issue 6 https://doi.org/10.1088/1741-4326/ab0c38	journal	April 2019
ECE electron temperature mapping errors in high-performance DIII-D discharges Garstka, G. D.; Austin, M. E.; Ellis, R. F. Fusion Engineering and Design, Vol. 53, Issue 1-4 https://doi.org/10.1016/s0920-3796(00)00486-5	journal	January 2001
110–140-GHz Wide-IF-Band 65-nm CMOS Receiver Design for Fusion Plasma Diagnostics Chen, Ying; Hu, Robert; Yu, Jo-Han IEEE Microwave and Wireless Components Letters, Vol. 32, Issue 6 https://doi.org/10.1109/LMWC.2021.3139628	journal	June 2022
ECRad: An electron cyclotron radiation transport solver for advanced data analysis in thermal and non-thermal fusion plasmas Denk, S. S.; Fischer, R.; Poli, E. Computer Physics Communications, Vol. 253 https://doi.org/10.1016/j.cpc.2020.107175	journal	August 2020
Development of intelligent control module for the J-TEXT electron cyclotron emission imaging system Yang, Z. J.; Zhou, J.; Pan, X. M. Fusion Engineering and Design, Vol. 153 https://doi.org/10.1016/j.fusengdes.2020.111494	journal	April 2020
Millimeter-wave imaging diagnostics systems on the EAST tokamak (invited) Zhu, Y. L.; Xie, J. L.; Yu, C. X. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4959162	journal	August 2016
Numerical modeling of pedestal stability and broadband turbulence of wide-pedestal QH-mode plasmas on DIII-D Li, Zeyu; Chen, Xi; Muscatello, C. M. Nuclear Fusion, Vol. 62, Issue 7 https://doi.org/10.1088/1741-4326/ac4acf	journal	May 2022
A frequency tunable, eight-channel correlation ECE system for electron temperature turbulence measurements on the DIII-D tokamak Sung, C.; Peebles, W. A.; Wannberg, C. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4961296	journal	August 2016
Synthetic diagnostics platform for fusion plasmas (invited) Shi, L.; Valeo, E. J.; Tobias, B. J. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4961553	journal	August 2016
Liquid crystal polymer receiver modules for electron cyclotron emission imaging on the DIII-D tokamak Zhu, Y.; Ye, Y.; Yu, J-H. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5035373	journal	October 2018

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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)

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