Role of microtearing mode in DIII-D and future high- beta p core plasmas
文献类型：期刊论文
| 作者 | Jian, X.2; Holland, C.2; Candy, J.3; Ding, S.1,4; Belli, E.3; Chan, V3; Staebler, G. M.3; Garofalo, A. M.3; Mcclenaghan, J.3; Snyder, P.3 |
| 刊名 | PHYSICS OF PLASMAS
 |
| 出版日期 | 2021-04-01 |
| 卷号 | 28 |
| ISSN号 | 1070-664X |
| DOI | 10.1063/5.0037246 |
| 通讯作者 | Jian, X.(xijian@ucsd.edu) |
| 英文摘要 | Excellent confinement has been routinely observed in DIII-D (J. L. Luxon, Nucl. Fusion 2002) high beta p discharges, which are characterized by a strong large-radius internal transport barrier (ITB) in almost all kinetic channels. Typically, the ion thermal transport is neoclassical with conventional long-wavelength turbulence instabilities suppressed by alpha stabilization, while the mechanism for the anomalous electron thermal transport remains unclear [Garofalo et al., Nucl. Fusion 55(12), 123025 (2015)]. A new gyrokinetic analysis shows that while the large values of alpha in the ITB can stabilize all local electrostatic drift wave (ES-DW) instabilities as well as the kinetic ballooning mode, a new slab-like microtearing mode (MTM) with its eigenfunction mainly peaking on the high field slide is destabilized. This destabilization is shown to be more likely to happen in discharges with high safety factors. Nonlinear gyrokinetic simulations demonstrate that this MTM branch can reproduce the experimentally inferred electron thermal flux in the ITB region and, therefore, provide convincing evidence that the electron temperature profile in the ITB is regulated by the MTM. Extrapolations to the future scenarios, like ITER high beta p plasmas, show that the dominant instability is likely to come back to ES-DW due to the lower density gradient and collisionality. However, even in this regime, some unusual features associated with MTMs predicted for DIII-D parameters, such as the high-field-side peaking and slab nature, may remain for the reactor ES-DW. |
| 资助项目 | U.S. Department of Energy[DE-SC0018287] ; U.S. Department of Energy[DE-SC0017992] ; U.S. Department of Energy[DE-FG02-95ER54309] ; U.S. Department of Energy[DE-FC02-04ER54698] ; agency of the United States Government |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000636766300002 |
| 出版者 | AMER INST PHYSICS |
| 资助机构 | U.S. Department of Energy ; agency of the United States Government |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/121575]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Jian, X. |
| 作者单位 | 1.Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA 2.Univ Calif San Diego, 9500 Gilman Dr, San Diego, CA 92093 USA 3.Gen Atom, POB 85608, San Diego, CA 92186 USA 4.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jian, X.,Holland, C.,Candy, J.,et al. Role of microtearing mode in DIII-D and future high- beta p core plasmas[J]. PHYSICS OF PLASMAS,2021,28. |
| APA | Jian, X..,Holland, C..,Candy, J..,Ding, S..,Belli, E..,...&Snyder, P..(2021).Role of microtearing mode in DIII-D and future high- beta p core plasmas.PHYSICS OF PLASMAS,28. |
| MLA | Jian, X.,et al."Role of microtearing mode in DIII-D and future high- beta p core plasmas".PHYSICS OF PLASMAS 28(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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