Progress in extending high poloidal beta scenarios on DIII-D towards a steady-state fusion reactor and impact of energetic particles
文献类型：期刊论文
| 作者 | Huang, J.1 ; Garofalo, A. M.2; Qian, J. P.1; Gong, X. Z.1; Ding, S. Y.1; Varela, J.3; Chen, J. L.1; Guo, W. F.1; Li, K.1; Wu, M. Q.4
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| 刊名 | NUCLEAR FUSION
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| 出版日期 | 2020-12-01 |
| 卷号 | 60 |
| 关键词 | tokamak steady state high bootstrap current energetic particle |
| ISSN号 | 0029-5515 |
| DOI | 10.1088/1741-4326/abaf33 |
| 通讯作者 | Huang, J.(juan.huang@ipp.ac.cn) |
| 英文摘要 | To prepare for steady-state operation of future fusion reactors (e.g. the International Thermonuclear Experimental Reactor and China Fusion Engineering Test Reactor (CFETR)), experiments on DIII-D have extended the high poloidal beta (beta(P)) scenario to reactor-relevant edge safety factorq(95)similar to 6.0, while maintaining a large-radius internal transport barrier (ITB) using negative magnetic shear. Excellent energy confinement quality (H-98y2> 1.5) is sustained at high normalized beta (beta(N)similar to 3.5). This high-performance ITB state with Greenwald density fraction near 100% andq(min)>= 3 is achieved with toroidal plasma rotationV(tor)similar to 0 at rho >= 0.6. This is a key result for reactors expected to have lowV(tor). At high beta(P)(>= 1.9), large Shafranov shift can stabilize turbulence leading to a high confinement state with a low pedestal and an ITB. At lower beta(P)(<1.9), negative magnetic shear in the plasma core contributes to turbulence suppression and can compensate for reduced Shafranov shift to continue to access a large-radius ITB and excellent confinement with lowV(tor), consistent with the results of gyrofluid transport simulations. These high-beta(P)cases are characterized by weak/no Alfven eigenmodes (a.e.) and classical fast-ion transport. At high density, the fast-ion deceleration time decreases and Delta beta(fast)is lower; these reduce a.e. drive. The reverse-shear Alfven eigenmodes are weaker or stable because the negative magnetic shear region is located at higher radius, away from the peaked fast-ion profile. Resistive wall modes can be a limitation at simultaneous high beta(N), low internal inductance, and low rotation. Analysis suggests that additional off-axis external current drive could provide a more stable path at reducedq(95). Based on a DIII-D high-beta(P)plasma with large-radius ITB, two scenarios are proposed for CFETRQ= 5 steady-state operation with similar to 1 GW fusion power: a lower-li |
| WOS关键词 | ALFVEN EIGENMODES |
| 资助项目 | U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-FC02-04ER54698] ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-AC52-07NA27344] ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-FG02-08ER54999] ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-AC05-00OR22725] ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-FG02-08ER54984] ; National Natural Science Foundation of China[11975276] ; Anhui Provincial Natural Science Foundation[2008085J04] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000575503500001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; National Natural Science Foundation of China ; Anhui Provincial Natural Science Foundation |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/104377]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Huang, J. |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, Hefei, Anhui, Peoples R China 2.Gen Atom, San Diego, CA USA 3.Univ Carlos III Madrid, Madrid 28911, Spain 4.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China 5.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA 6.Univ Wisconsin, Madison, WI USA 7.Univ Calif Los Angeles, Los Angeles, CA USA 8.Oak Ridge Associated Univ, Oak Ridge, TN USA |
| 推荐引用方式 GB/T 7714 | Huang, J.,Garofalo, A. M.,Qian, J. P.,et al. Progress in extending high poloidal beta scenarios on DIII-D towards a steady-state fusion reactor and impact of energetic particles[J]. NUCLEAR FUSION,2020,60. |
| APA | Huang, J..,Garofalo, A. M..,Qian, J. P..,Gong, X. Z..,Ding, S. Y..,...&Yan, Z..(2020).Progress in extending high poloidal beta scenarios on DIII-D towards a steady-state fusion reactor and impact of energetic particles.NUCLEAR FUSION,60. |
| MLA | Huang, J.,et al."Progress in extending high poloidal beta scenarios on DIII-D towards a steady-state fusion reactor and impact of energetic particles".NUCLEAR FUSION 60(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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