Title: Resonant mode effects on rotation braking induced by n = 1 resonant magnetic perturbations in the EAST tokamak

Abstract

Abstract The spectrum effects on toroidal rotation braking, induced by n  = 1 resonant magnetic perturbations (RMPs) in the discharges with $q_{95}=4.1$ and $q_{95}=5.1$ , are studied in the EAST tokamak. Here n is the toroidal mode number, RMP spectrum is varied by scanning $\delta {\varphi }_{\mathrm{U}\mathrm{L}}$ , the phase difference between the upper and lower rows of RMP coils. The toroidal rotation changes periodically with the periodic $\delta {\varphi }_{\mathrm{U}\mathrm{L}}$ scanning and such an effect is stronger in the discharge with lower $q_{95}=4.1$ . The spectrum dependence of the neoclassical toroidal viscosity (NTV) torque, modeled by NTVTOK based on the magnetic perturbation obtained from MARS-F calculation, agrees well with that of the experimentally observed braking torques in both discharges. The modeled NTV torque is stronger in the discharge with lower q ₉₅ , which also agrees with the observations. The comparisons between the spectrum dependence of the NTV and magnetic perturbations show that the resonant mode of magnetic perturbations near the plasma edge mainly contribute the NTV torque. These agreements between modeling and experiments highlight the capability of NTV theory in explaining the experimental observation in the EAST tokamak.

Authors:

Sheng, H. ;

• Search DOE PAGES for author "Sheng, H."
• Search DOE PAGES for ORCID "0000-0001-6052-5229"

Sun, Y. W. ;

• Search DOE PAGES for author "Sun, Y. W."
• Search DOE PAGES for ORCID "0000-0002-9934-1328"

Li, X. Y.; Li, H. H.; Wu, X. M.; Li, Y. Y. ;

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• Search DOE PAGES for ORCID "0000-0002-2978-908X"

Mao, S. F. ;

• Search DOE PAGES for author "Mao, S. F."
• Search DOE PAGES for ORCID "0000-0002-2370-1585"

Ma, Q. ;

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• Search DOE PAGES for ORCID "0000-0001-8057-8934"

Liu, Y. Q. ;

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• Search DOE PAGES for ORCID "0000-0002-8192-8411"

Ye, C. ;

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• Search DOE PAGES for ORCID "0000-0001-6941-8745"

Yan, X. T. ;

• Search DOE PAGES for author "Yan, X. T."
• Search DOE PAGES for ORCID "0000-0002-0934-2969"

Xie, P. C. ;

• Search DOE PAGES for author "Xie, P. C."
• Search DOE PAGES for ORCID "0000-0002-0567-646X"

Zang, Q.; Wang, H. H. ;

• Search DOE PAGES for author "Wang, H. H."
• Search DOE PAGES for ORCID "0000-0002-3034-0925"

Jia, M. N. ;

• Search DOE PAGES for author "Jia, M. N."
• Search DOE PAGES for ORCID "0000-0002-1672-9782"

Ye, M. Y.

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• Search DOE PAGES for ORCID "0000-0002-9055-1476"

Publication Date:

Fri May 19 00:00:00 EDT 2023

Sponsoring Org.:

USDOE

OSTI Identifier:

1974281

Alternate Identifier(s):

OSTI ID: 1972394

Grant/Contract Number:  

SC0020298

Resource Type:

Published Article

Journal Name:

Nuclear Fusion

Additional Journal Information:

Journal Name: Nuclear Fusion Journal Volume: 63 Journal Issue: 7; Journal ID: ISSN 0029-5515

Publisher:

IOP Publishing

Country of Publication:

IAEA

Language:

English