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Title: Application of an empirical saturation rule to TGLF to unify low-k and high-k turbulence dominated regimes

Abstract

Here, we propose a phenomenological turbulence saturation model and apply it to the TGLF turbulence transport model, which captures the physics of interaction between low-k and high-k turbulence consistent with the multi-scale gyro-kinetic simulation result. The new model, TGLF-VX is tested with three discharges from DIII-D and EAST tokamak, which cover both low-k and high-k turbulence dominated regimes. It is found that the profile match can be substantially improved over previous models when evolving Te, Ti and ne simultaneously. Good agreement for all three discharges is obtained with one fixed parameter in the model when taking experimental uncertainties into consideration. Finally, TGLF-VX is applied to explore the sensitivity of the predicted CFETR steady-state performance to different transport models. Our result shows that a scenario using only RF auxiliary heating could be significantly affected.

Authors:
 [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [5];  [6]
  1. Huazhong Univ. of Science and Technology, Wuhan (People's Republic of China)
  2. Univ. of Science and Technology of China, Hefei (China); General Atomics, San Diego, CA (United States)
  3. Chinese Academy of Sciences, Hefei (China)
  4. Peking Univ., Beijing (China)
  5. General Atomics, San Diego, CA (United States)
  6. Huazhong Univ. of Science and Technology, Wuhan (People's Republic of China); Univ. of Science and Technology of China, Hefei (China)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1405120
Grant/Contract Number:
FC02-04ER54698
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 58; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma turbulence; TGLF model; multi-scale simulation; experimental validation

Citation Formats

Jian, Xiang, Chan, Vincent S., Chen, Jiale, Li, Zeyu, Garofalo, Andrea M., and Zhuang, Ge. Application of an empirical saturation rule to TGLF to unify low-k and high-k turbulence dominated regimes. United States: N. p., 2017. Web. doi:10.1088/1741-4326/aa8fb2.
Jian, Xiang, Chan, Vincent S., Chen, Jiale, Li, Zeyu, Garofalo, Andrea M., & Zhuang, Ge. Application of an empirical saturation rule to TGLF to unify low-k and high-k turbulence dominated regimes. United States. doi:10.1088/1741-4326/aa8fb2.
Jian, Xiang, Chan, Vincent S., Chen, Jiale, Li, Zeyu, Garofalo, Andrea M., and Zhuang, Ge. Thu . "Application of an empirical saturation rule to TGLF to unify low-k and high-k turbulence dominated regimes". United States. doi:10.1088/1741-4326/aa8fb2.
@article{osti_1405120,
title = {Application of an empirical saturation rule to TGLF to unify low-k and high-k turbulence dominated regimes},
author = {Jian, Xiang and Chan, Vincent S. and Chen, Jiale and Li, Zeyu and Garofalo, Andrea M. and Zhuang, Ge},
abstractNote = {Here, we propose a phenomenological turbulence saturation model and apply it to the TGLF turbulence transport model, which captures the physics of interaction between low-k and high-k turbulence consistent with the multi-scale gyro-kinetic simulation result. The new model, TGLF-VX is tested with three discharges from DIII-D and EAST tokamak, which cover both low-k and high-k turbulence dominated regimes. It is found that the profile match can be substantially improved over previous models when evolving Te, Ti and ne simultaneously. Good agreement for all three discharges is obtained with one fixed parameter in the model when taking experimental uncertainties into consideration. Finally, TGLF-VX is applied to explore the sensitivity of the predicted CFETR steady-state performance to different transport models. Our result shows that a scenario using only RF auxiliary heating could be significantly affected.},
doi = {10.1088/1741-4326/aa8fb2},
journal = {Nuclear Fusion},
number = ,
volume = 58,
place = {United States},
year = {Thu Sep 28 00:00:00 EDT 2017},
month = {Thu Sep 28 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on September 28, 2018
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