ELM Suppression by Boron Powder Injection and Comparison with Lithium Powder Injection on EAST
文献类型：期刊论文
| 作者 | Maingi, R.2; Hu, J. S.3 ; Sun, Z.2; Diallo, A.2; Tritz, K.1; Qian, Y. Z.3; Xu, W.3,4; Zuo, G. Z.3; Li, C. L.3; Huang, M.3
|
| 刊名 | JOURNAL OF FUSION ENERGY
 |
| 出版日期 | 2020-10-12 |
| 关键词 | Edge-localized modes EAST Impurities Turbulence |
| ISSN号 | 0164-0313 |
| DOI | 10.1007/s10894-020-00256-3 |
| 通讯作者 | Maingi, R.(rmaingi@pppl.gov) |
| 英文摘要 | Type I edge-localized modes (ELMs) in the Experimental Advanced Superconducting Tokamak (EAST) were completely suppressed via boron powder injection into the X-point region of an upper-single null configuration over a wide range of operating conditions (2.8 < P-aux < 7.5 MW, 3.8 x 10(19) < n(e) < 6 x 10(19) m(-3), RF-only and RF + NBI heating scenarios, both grad-B drift directions, and even He ion majority plasmas) (Sun et al. in Nucl. Fusion, 2020). A window of edge B concentration for stable long pulse operation was identified: too low and ELMs return, too high and the discharge suffers radiative collapse. The injection of boron powder above the minimum for ELM suppression coincided with the occurrence of an edge harmonic oscillation detected in magnetics (both on the high-field side and low-field side), in AXUV diodes near the upper X-point, divertor D alpha emission, and in a range of other diagnostics (Diallo et al. in: Proceedings of 2020 IAEA fusion energy conference, 2021). No harmonic oscillation was observed when ELMs were present, and stored energy was slightly increased at constant density during ELM suppression. Core tungsten emission during ELM suppression either increased or decreased relative to ELMy H-mode, but the W emission was maintained at acceptable levels. The threshold B injection rate was measured for several conditions, and found to increase with heating power. Li powder injection into comparable discharges also resulted in a short phase of ELM suppression, but density and stored energy both decreased due to the strong pumping effect of lithium; no edge harmonic oscillation was observed with Li injection, indicating that the ELM suppression mechanisms differ. The new set of B-seeded, ELM-suppressed discharges exhibited certain characteristics of quiescent H-mode (Burrell et al. in Phys Plasmas 8:2153, 2001), but did not require high shear, counter beams, etc. The wide operating window and compatibility with RF-only discharges paves the way for future experiments targeting long pulse H-mode discharges with complete ELM suppression. |
| WOS关键词 | MODE PLASMAS |
| 资助项目 | U.S. Dept. of Energy[DE-AC02-09CH11466] ; U.S. Dept. of Energy[DE-FG02-09ER55012] ; U.S. Dept. of Energy[DE-FC02-04ER54698] ; National Key Research and Development Program of China[2017YFA0402500] ; National Key Research and Development Program of China[2017YFE0301100] ; National Nature Science Foundation of China[11625524] ; National Nature Science Foundation of China[11775261] ; National Nature Science Foundation of China[11605246] ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy[DE-AC02-09CH11466] |
| WOS研究方向 | Nuclear Science & Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000577089100001 |
| 出版者 | SPRINGER |
| 资助机构 | U.S. Dept. of Energy ; National Key Research and Development Program of China ; National Nature Science Foundation of China ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/104455]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Maingi, R. |
| 作者单位 | 1.Johns Hopkins Univ, Baltimore, MD USA 2.Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA 3.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China 4.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China |
| 推荐引用方式 GB/T 7714 | Maingi, R.,Hu, J. S.,Sun, Z.,et al. ELM Suppression by Boron Powder Injection and Comparison with Lithium Powder Injection on EAST[J]. JOURNAL OF FUSION ENERGY,2020. |
| APA | Maingi, R..,Hu, J. S..,Sun, Z..,Diallo, A..,Tritz, K..,...&Gong, X. Z..(2020).ELM Suppression by Boron Powder Injection and Comparison with Lithium Powder Injection on EAST.JOURNAL OF FUSION ENERGY. |
| MLA | Maingi, R.,et al."ELM Suppression by Boron Powder Injection and Comparison with Lithium Powder Injection on EAST".JOURNAL OF FUSION ENERGY (2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。