Low-nglobal ideal MHD instabilities in the CFETR baseline scenario
- 1 August 2020
- journal article
- research article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 62 (8), 085016
- https://doi.org/10.1088/1361-6587/ab97f0
Abstract
This article reports an evaluation on the linear ideal magnetohydrodynamic (MHD) stability of the China Fusion Engineering Test Reactor (CFETR) baseline scenario for various first-wall locations. The initial-value code NIMROD and eigen-value code AEGIS are employed in this analysis. Despite the distinctly different approaches in modeling the scrape off layer region, the dominant growth in each of the low-n (n = 1 - 10) modes are consistent between the two codes. The higher-nmodes are dominated by ballooning modes and localized in the pedestal region, while the lower-nmodes have more prominent external kink components and broader mode profiles. The influence of the plasma-vacuum profile and wall shape are also examined using NIMROD. In the presence of a resistive wall, the low-nideal MHD instabilities are further studied using AEGIS. For the designed first-wall location, then = 1 resistive wall mode is found to be unstable, which could be fully stabilized by uniform toroidal rotation above the 2.9% core Alfven speed.Funding Information
- CAS President International Fellowship Initiative
- China Postdoctoral Science Foundation (2016M592054)
- Fundamental Research Funds for the Central Universities at Huazhong University of Science and Technology (2019kfyXJJS193)
- Office of Science (DE-AC02-05CH11231)
- Fusion Energy Sciences (DE-FG02-86ER53218, DE-SC0018001)
- National Key Research and Development Program of China (2017YFE0300500, 2017YFE0300501)
- National Natural Science Foundation of China (11775221, 51821005)
- Anhui Provincial Natural Science Foundation (1708085QA22)
This publication has 32 references indexed in Scilit:
- Physics of resistive wall modesNuclear Fusion, 2012
- Stabilization of the external kink and the resistive wall modePlasma Physics and Controlled Fusion, 2010
- Reduced Critical Rotation for Resistive-Wall Mode Stabilization in a Near-Axisymmetric ConfigurationPhysical Review Letters, 2007
- Rotational Stabilization of Resistive Wall Modes by the Shear Alfvén ResonancePhysical Review Letters, 2005
- Resistive Wall Mode in Collisionless Quasistationary PlasmasPhysical Review Letters, 2004
- Stabilization of resistive wall modes in ITER by active feedback and toroidal rotationNuclear Fusion, 2004
- Resistive wall stabilization of high-beta plasmas in DIII–DNuclear Fusion, 2003
- The ITER designPlasma Physics and Controlled Fusion, 2002
- The bootstrap current and its consequencesPlasma Physics and Controlled Fusion, 2000
- Stability Analysis of Resistive Wall Kink Modes in Rotating PlasmasPhysical Review Letters, 1995